Merge branch 'develop'

This reverts commit 8afe162910.

.travis.yml

@@ -1,12 +1,10 @@
-# Copyright 2016-2019 Peter Dimov
+# Copyright 2016-2020 Peter Dimov
 # Distributed under the Boost Software License, Version 1.0.
 # (See accompanying file LICENSE_1_0.txt or copy at http://boost.org/LICENSE_1_0.txt)
 
 language: cpp
 
-sudo: false
-
-dist: trusty
+dist: xenial
 
 branches:
   only:
@@ -25,8 +23,23 @@ matrix:
 
   include:
     - os: linux
+      arch: arm64
       compiler: g++
-      env: TOOLSET=gcc COMPILER=g++ CXXSTD=03,11
+      env: TOOLSET=gcc COMPILER=g++ CXXSTD=03,11,14
+
+    - os: linux
+      arch: ppc64le
+      compiler: g++
+      env: TOOLSET=gcc COMPILER=g++ CXXSTD=03,11,14
+
+    - os: linux
+      arch: s390x
+      compiler: g++
+      env: TOOLSET=gcc COMPILER=g++ CXXSTD=03,11,14
+
+    - os: freebsd
+      compiler: clang++
+      env: TOOLSET=clang COMPILER=clang++ CXXSTD=03,11,14,17,2a
 
     - os: linux
       compiler: g++-4.4
@@ -147,6 +160,28 @@ matrix:
           sources:
             - ubuntu-toolchain-r-test
 
+    - os: linux
+      dist: bionic
+      compiler: g++-10
+      env: TOOLSET=gcc COMPILER=g++-10 CXXSTD=03,11,14
+      addons:
+        apt:
+          packages:
+            - g++-10
+          sources:
+            - ubuntu-toolchain-r-test
+
+    - os: linux
+      dist: bionic
+      compiler: g++-10
+      env: TOOLSET=gcc COMPILER=g++-10 CXXSTD=17,2a
+      addons:
+        apt:
+          packages:
+            - g++-10
+          sources:
+            - ubuntu-toolchain-r-test
+
     - os: linux
       compiler: g++-7
       env: UBSAN=1 TOOLSET=gcc COMPILER=g++-7 CXXSTD=03,11,14,17 UBSAN_OPTIONS=print_stacktrace=1 LINKFLAGS=-fuse-ld=gold
@@ -158,10 +193,7 @@ matrix:
             - ubuntu-toolchain-r-test
 
     - os: linux
-      compiler: clang++
-      env: TOOLSET=clang COMPILER=clang++ CXXSTD=03,11
-
-    - os: linux
+      dist: trusty
       compiler: /usr/bin/clang++
       env: TOOLSET=clang COMPILER=/usr/bin/clang++ CXXSTD=03,11
       addons:
@@ -170,6 +202,7 @@ matrix:
             - clang-3.3
 
     - os: linux
+      dist: trusty
       compiler: /usr/bin/clang++
       env: TOOLSET=clang COMPILER=/usr/bin/clang++ CXXSTD=03,11
       addons:
@@ -179,15 +212,13 @@ matrix:
 
     - os: linux
       compiler: clang++-3.5
-      env: TOOLSET=clang COMPILER=clang++-3.5 CXXSTD=03,11,14,1z
+      env: TOOLSET=clang COMPILER=clang++-3.5 CXXSTD=03,11
       addons:
         apt:
           packages:
             - clang-3.5
-            - libstdc++-4.9-dev
           sources:
             - ubuntu-toolchain-r-test
-            - llvm-toolchain-precise-3.5
 
     - os: linux
       compiler: clang++-3.6
@@ -198,7 +229,6 @@ matrix:
             - clang-3.6
           sources:
             - ubuntu-toolchain-r-test
-            - llvm-toolchain-precise-3.6
 
     - os: linux
       compiler: clang++-3.7
@@ -209,7 +239,6 @@ matrix:
             - clang-3.7
           sources:
             - ubuntu-toolchain-r-test
-            - llvm-toolchain-precise-3.7
 
     - os: linux
       compiler: clang++-3.8
@@ -218,10 +247,8 @@ matrix:
         apt:
           packages:
             - clang-3.8
-            - libstdc++-4.9-dev
           sources:
             - ubuntu-toolchain-r-test
-            - llvm-toolchain-precise-3.8
 
     - os: linux
       compiler: clang++-3.9
@@ -230,10 +257,8 @@ matrix:
         apt:
           packages:
             - clang-3.9
-            - libstdc++-4.9-dev
           sources:
             - ubuntu-toolchain-r-test
-            - llvm-toolchain-precise-3.9
 
     - os: linux
       compiler: clang++-4.0
@@ -244,7 +269,6 @@ matrix:
             - clang-4.0
           sources:
             - ubuntu-toolchain-r-test
-            - llvm-toolchain-trusty-4.0
 
     - os: linux
       compiler: clang++-5.0
@@ -255,7 +279,6 @@ matrix:
             - clang-5.0
           sources:
             - ubuntu-toolchain-r-test
-            - llvm-toolchain-trusty-5.0
 
     - os: linux
       compiler: clang++-6.0
@@ -266,7 +289,6 @@ matrix:
             - clang-6.0
           sources:
             - ubuntu-toolchain-r-test
-            - llvm-toolchain-trusty-6.0
 
     - os: linux
       compiler: clang++-7
@@ -277,7 +299,7 @@ matrix:
             - clang-7
           sources:
             - ubuntu-toolchain-r-test
-            - llvm-toolchain-trusty-7
+            - llvm-toolchain-xenial-7
 
     - os: linux
       compiler: clang++-8
@@ -288,21 +310,47 @@ matrix:
             - clang-8
           sources:
             - ubuntu-toolchain-r-test
-            - llvm-toolchain-trusty-8
+            - llvm-toolchain-xenial-8
 
     - os: linux
-      compiler: clang++-7
-      env: UBSAN=1 TOOLSET=clang COMPILER=clang++-7 CXXSTD=03,11,14,17,2a UBSAN_OPTIONS=print_stacktrace=1
+      dist: xenial
+      compiler: clang++-9
+      env: TOOLSET=clang COMPILER=clang++-9 CXXSTD=03,11,14,17,2a
       addons:
         apt:
           packages:
-            - clang-7
-            - libstdc++-5-dev
+            - clang-9
           sources:
             - ubuntu-toolchain-r-test
-            - llvm-toolchain-trusty-7
+            - sourceline: 'deb https://apt.llvm.org/xenial/ llvm-toolchain-xenial-9 main'
+              key_url: 'https://apt.llvm.org/llvm-snapshot.gpg.key'
 
     - os: linux
+      dist: xenial
+      compiler: clang++-10
+      env: TOOLSET=clang COMPILER=clang++-10 CXXSTD=03,11,14,17,2a
+      addons:
+        apt:
+          packages:
+            - clang-10
+          sources:
+            - ubuntu-toolchain-r-test
+            - sourceline: 'deb https://apt.llvm.org/xenial/ llvm-toolchain-xenial-10 main'
+              key_url: 'https://apt.llvm.org/llvm-snapshot.gpg.key'
+
+    - os: linux
+      compiler: clang++-8
+      env: UBSAN=1 TOOLSET=clang COMPILER=clang++-8 CXXSTD=03,11,14,17,2a UBSAN_OPTIONS=print_stacktrace=1
+      addons:
+        apt:
+          packages:
+            - clang-8
+          sources:
+            - ubuntu-toolchain-r-test
+            - llvm-toolchain-xenial-8
+
+    - os: linux
+      dist: trusty
       compiler: clang++-libc++
       env: TOOLSET=clang COMPILER=clang++-libc++ CXXSTD=03,11,14,1z
       addons:
@@ -311,6 +359,7 @@ matrix:
             - libc++-dev
 
     - os: linux
+      dist: trusty
       compiler: clang++-libc++
       env: UBSAN=1 TOOLSET=clang COMPILER=clang++-libc++ CXXSTD=03,11,14,1z UBSAN_OPTIONS=print_stacktrace=1
       addons:
@@ -322,6 +371,17 @@ matrix:
       compiler: clang++
       env: TOOLSET=clang COMPILER=clang++ CXXSTD=03,11,14,1z
 
+    - os: osx
+      compiler: clang++
+      env: UBSAN=1 TOOLSET=clang COMPILER=clang++ CXXSTD=03,11,14,1z UBSAN_OPTIONS=print_stacktrace=1
+
+    - os: linux
+      env: CMAKE_TEST=1
+      script:
+        - mkdir __build__ && cd __build__
+        - cmake -DBOOST_ENABLE_CMAKE=1 -DBoost_VERBOSE=1 -DBOOST_INCLUDE_LIBRARIES=smart_ptr -DBUILD_TESTING=ON ..
+        - ctest --output-on-failure -R boost_smart_ptr
+
     - os: linux
       compiler: g++
       env: CMAKE_SUBDIR_TEST=1
@@ -331,6 +391,18 @@ matrix:
       - cmake --build .
       - cmake --build . --target check
 
+    - os: linux
+      env: CMAKE_INSTALL_TEST=1
+      script:
+        - pip install --user cmake
+        - mkdir __build__ && cd __build__
+        - cmake -DBOOST_ENABLE_CMAKE=1 -DBoost_VERBOSE=1 -DBOOST_INCLUDE_LIBRARIES=smart_ptr -DBUILD_TESTING=OFF -DCMAKE_INSTALL_PREFIX=~/.local ..
+        - cmake --build . --target install
+        - cd ../libs/smart_ptr/test/cmake_install_test && mkdir __build__ && cd __build__
+        - cmake -DCMAKE_INSTALL_PREFIX=~/.local ..
+        - cmake --build .
+        - cmake --build . --target check
+
 install:
   - BOOST_BRANCH=develop && [ "$TRAVIS_BRANCH" == "master" ] && BOOST_BRANCH=master || true
   - cd ..
@@ -352,7 +424,10 @@ install:
   - git submodule init tools/build
   - git submodule init libs/headers
   - git submodule init tools/boost_install
-  - git submodule update --jobs 3
+  - git submodule init tools/cmake
+  - git submodule init libs/preprocessor
+  - git submodule init libs/bind
+  - git submodule update # no --jobs 3 on non-amd64
   - cp -r $TRAVIS_BUILD_DIR/* libs/smart_ptr
   - ./bootstrap.sh
   - ./b2 headers

CMakeLists.txt

@@ -1,12 +1,10 @@
-# Copyright 2018 Mike Dev
+# Copyright 2018-2020 Peter Dimov
 # Distributed under the Boost Software License, Version 1.0.
 # See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt
 
-# Partial (add_subdirectory only) and experimental CMake support
-# Subject to change; please do not rely on the contents of this file yet
+cmake_minimum_required(VERSION 3.5...3.16)
 
-cmake_minimum_required(VERSION 3.5)
-project(BoostSmartPtr LANGUAGES CXX)
+project(boost_smart_ptr VERSION "${BOOST_SUPERPROJECT_VERSION}" LANGUAGES CXX)
 
 add_library(boost_smart_ptr INTERFACE)
 add_library(Boost::smart_ptr ALIAS boost_smart_ptr)
@@ -14,13 +12,18 @@ add_library(Boost::smart_ptr ALIAS boost_smart_ptr)
 target_include_directories(boost_smart_ptr INTERFACE include)
 
 target_link_libraries(boost_smart_ptr
-    INTERFACE
-        Boost::assert
-        Boost::config
-        Boost::core
-        Boost::move
-        Boost::predef
-        Boost::static_assert
-        Boost::throw_exception
-        Boost::type_traits
+  INTERFACE
+    Boost::assert
+    Boost::config
+    Boost::core
+    Boost::move
+    Boost::static_assert
+    Boost::throw_exception
+    Boost::type_traits
 )
+
+if(BUILD_TESTING)
+
+  add_subdirectory(test)
+
+endif()

appveyor.yml

@@ -70,6 +70,7 @@ install:
   - git submodule init tools/build
   - git submodule init libs/headers
   - git submodule init tools/boost_install
+  - git submodule init libs/bind
   - git submodule update --jobs 3
   - xcopy /s /e /q %APPVEYOR_BUILD_FOLDER% libs\smart_ptr\
   - cmd /c bootstrap

doc/smart_ptr-docinfo-footer.html

@@ -1,6 +1,7 @@
 <style>
 
 *:not(pre)>code { background: none; color: #600000; }
+:not(pre):not([class^=L])>code { background: none; color: #600000; }
 table tr.even, table tr.alt, table tr:nth-of-type(even) { background: none; }
 
 </style>

doc/smart_ptr.adoc

@@ -18,40 +18,26 @@ Greg Colvin, Beman Dawes, Peter Dimov, Glen Fernandes
 :leveloffset: +1
 
 include::smart_ptr/introduction.adoc[]
-
 include::smart_ptr/changelog.adoc[]
-
 include::smart_ptr/scoped_ptr.adoc[]
-
 include::smart_ptr/scoped_array.adoc[]
-
 include::smart_ptr/shared_ptr.adoc[]
-
 include::smart_ptr/weak_ptr.adoc[]
-
 include::smart_ptr/make_shared.adoc[]
-
 include::smart_ptr/enable_shared_from_this.adoc[]
-
 include::smart_ptr/enable_shared_from.adoc[]
-
 include::smart_ptr/make_unique.adoc[]
-
 include::smart_ptr/allocate_unique.adoc[]
-
 include::smart_ptr/intrusive_ptr.adoc[]
-
 include::smart_ptr/intrusive_ref_counter.adoc[]
-
 include::smart_ptr/local_shared_ptr.adoc[]
-
 include::smart_ptr/make_local_shared.adoc[]
-
 include::smart_ptr/pointer_cast.adoc[]
-
 include::smart_ptr/pointer_to_other.adoc[]
-
 include::smart_ptr/atomic_shared_ptr.adoc[]
+include::smart_ptr/owner_less.adoc[]
+include::smart_ptr/owner_equal_to.adoc[]
+include::smart_ptr/owner_hash.adoc[]
 
 // appendix
 include::smart_ptr/techniques.adoc[]
@@ -73,7 +59,7 @@ This documentation is
 * Copyright 1999 Greg Colvin
 * Copyright 1999 Beman Dawes
 * Copyright 2002 Darin Adler
-* Copyright 2003-2017 Peter Dimov
+* Copyright 2003-2020 Peter Dimov
 * Copyright 2005, 2006 Ion Gaztañaga
 * Copyright 2008 Frank Mori Hess
 * Copyright 2012-2017 Glen Fernandes

doc/smart_ptr/changelog.adoc

@@ -1,5 +1,5 @@
 ////
-Copyright 2019 Peter Dimov
+Copyright 2019, 2020 Peter Dimov
 
 Distributed under the Boost Software License, Version 1.0.
 
@@ -13,6 +13,15 @@ http://www.boost.org/LICENSE_1_0.txt
 :toc-title:
 :idprefix: changelog_
 
+## Changes in 1.74.0
+
+* Added `owner_equals` to `shared_ptr`, `weak_ptr`, `local_shared_ptr`
+* Added `owner_hash_value` to `shared_ptr`, `weak_ptr`
+* Added `owner_equal_to`, `owner_hash`
+* Added `std::hash` specializations for `shared_ptr`, `local_shared_ptr`
+* Added `boost::hash` support to, and `std::hash`, `std::equal_to`
+  specializations for, `weak_ptr`
+
 ## Changes in 1.72.0
 
 * Added `allocate_unique`

doc/smart_ptr/introduction.adoc

@@ -31,7 +31,7 @@ This library provides six smart pointer class templates:
 * `<<scoped_ptr,scoped_ptr>>`, used to contain ownership of a dynamically allocated object to the current scope;
 * `<<scoped_array,scoped_array>>`, which provides scoped ownership for a dynamically allocated array;
 * `<<shared_ptr,shared_ptr>>`, a versatile tool for managing shared ownership of an object or array;
-* `<<weak_ptr,weak_ptr>>`, a non-owning observer to a shared_ptr-managed object that can be promoted temporarily to shared_ptr;
+* `<<weak_ptr,weak_ptr>>`, a non-owning observer to a `shared_ptr`-managed object that can be promoted temporarily to `shared_ptr`;
 * `<<intrusive_ptr,intrusive_ptr>>`, a pointer to objects with an embedded reference count;
 * `<<local_shared_ptr,local_shared_ptr>>`, providing shared ownership within a single thread.
 
@@ -39,10 +39,11 @@ This library provides six smart pointer class templates:
 
 In addition, the library contains the following supporting utility functions and classes:
 
-* `<<make_shared,make_shared>>`, a factory function for creating objects that returns a `shared_ptr`;
+* `<<make_shared,make_shared>>` and `allocate_shared`, factory functions for creating objects that return a `shared_ptr`;
 * `<<make_unique,make_unique>>`, a factory function returning `std::unique_ptr`;
 * `<<allocate_unique,allocate_unique>>`, a factory function for creating objects using an allocator that returns a `std::unique_ptr`;
 * `<<enable_shared_from_this,enable_shared_from_this>>`, a helper base class that enables the acquisition of a `shared_ptr` pointing to `this`;
+* `<<enable_shared_from,enable_shared_from>>`, a newer and better replacement for `enable_shared_from_this`;
 * `<<pointer_to_other,pointer_to_other>>`, a helper trait for converting one smart pointer type to another;
 * `<<pointer_cast,static_pointer_cast>>` and companions, generic smart pointer casts;
 * `<<intrusive_ref_counter,intrusive_ref_counter>>`, a helper base class containing a reference count.

doc/smart_ptr/intrusive_ptr.adoc

@@ -174,7 +174,8 @@ template<class Y> intrusive_ptr(intrusive_ptr<Y> && r);
 [none]
 * {blank}
 +
-Postconditions:: `get()` equals the old value of `r.get()`. `r.get() == 0`.
+Postconditions::
+  `get()` equals the old value of `r.get()`. `r.get() == 0`.
 
 ### destructor
 
@@ -185,7 +186,8 @@ Postconditions:: `get()` equals the old value of `r.get()`. `r.get() == 0`.
 [none]
 * {blank}
 +
-Effects:: `if(get() != 0) intrusive_ptr_release(get());`.
+Effects::
+  `if(get() != 0) intrusive_ptr_release(get());`.
 
 ### assignment
 
@@ -245,7 +247,8 @@ void reset(T * r, bool add_ref);
 [none]
 * {blank}
 +
-Effects:: Equivalent to `intrusive_ptr(r, add_ref).swap(*this)`.
+Effects::
+  Equivalent to `intrusive_ptr(r, add_ref).swap(*this)`.
 
 ### indirection
 
@@ -278,7 +281,8 @@ T * get() const noexcept;
 [none]
 * {blank}
 +
-Returns:: the stored pointer.
+Returns::
+  the stored pointer.
 
 ### detach
 
@@ -325,7 +329,8 @@ void swap(intrusive_ptr & b) noexcept;
 [none]
 * {blank}
 +
-Effects:: Exchanges the contents of the two smart pointers.
+Effects::
+  Exchanges the contents of the two smart pointers.
 
 ## Free Functions
 
@@ -412,7 +417,8 @@ template<class T> void swap(intrusive_ptr<T> & a, intrusive_ptr<T> & b) noexcept
 [none]
 * {blank}
 +
-Effects:: Equivalent to `a.swap(b)`.
+Effects::
+  Equivalent to `a.swap(b)`.
 
 ### get_pointer
 
@@ -437,7 +443,8 @@ template<class T, class U>
 [none]
 * {blank}
 +
-Returns:: `intrusive_ptr<T>(static_cast<T*>(r.get()))`.
+Returns::
+  `intrusive_ptr<T>(static_cast<T*>(r.get()))`.
 
 ### const_pointer_cast
 
@@ -449,7 +456,8 @@ template<class T, class U>
 [none]
 * {blank}
 +
-Returns:: `intrusive_ptr<T>(const_cast<T*>(r.get()))`.
+Returns::
+  `intrusive_ptr<T>(const_cast<T*>(r.get()))`.
 
 ### dynamic_pointer_cast
 
@@ -461,7 +469,8 @@ template<class T, class U>
 [none]
 * {blank}
 +
-Returns:: `intrusive_ptr<T>(dynamic_cast<T*>(r.get()))`.
+Returns::
+  `intrusive_ptr<T>(dynamic_cast<T*>(r.get()))`.
 
 ### operator<<
 

doc/smart_ptr/intrusive_ref_counter.adoc

@@ -111,7 +111,8 @@ intrusive_ref_counter& operator=(const intrusive_ref_counter& v) noexcept;
 [none]
 * {blank}
 +
-Effects:: Does nothing, reference counter is not modified.
+Effects::
+  Does nothing, reference counter is not modified.
 
 ### use_count
 
@@ -137,7 +138,8 @@ template<class Derived, class CounterPolicy>
 [none]
 * {blank}
 +
-Effects:: Increments the reference counter.
+Effects::
+  Increments the reference counter.
 
 ### intrusive_ptr_release
 

doc/smart_ptr/local_shared_ptr.adoc

@@ -124,7 +124,7 @@ namespace boost {
     template<class Y> void reset(local_shared_ptr<Y> && r, element_type * p) noexcept;
 
     // accessors
-    
+
     T & operator*() const noexcept; // only valid when T is not an array type
     T * operator->() const noexcept; // only valid when T is not an array type
 
@@ -143,12 +143,16 @@ namespace boost {
     template<class Y> operator weak_ptr<Y>() const noexcept;
 
     // swap
-    
+
     void swap(local_shared_ptr & b) noexcept;
 
     // owner_before
-    
-    template<class Y> bool owner_before(local_shared_ptr<Y> const & rhs) const noexcept;
+
+    template<class Y> bool owner_before(local_shared_ptr<Y> const & r) const noexcept;
+
+    // owner_equals
+
+    template<class Y> bool owner_equals(local_shared_ptr<Y> const & r) const noexcept;
   };
 
   // comparisons
@@ -459,7 +463,8 @@ template<class Y> void reset(local_shared_ptr<Y> && r, element_type * p) noexcep
 [none]
 * {blank}
 +
-Effects:: Equivalent to `local_shared_ptr(std::move(r), p).swap(*this)`.
+Effects::
+  Equivalent to `local_shared_ptr(std::move(r), p).swap(*this)`.
 
 ### indirection
 ```
@@ -497,7 +502,8 @@ element_type * get() const noexcept;
 [none]
 * {blank}
 +
-Returns:: The stored pointer.
+Returns::
+  The stored pointer.
 
 ### local_use_count
 ```
@@ -506,7 +512,8 @@ long local_use_count() const noexcept;
 [none]
 * {blank}
 +
-Returns:: The number of `local_shared_ptr` objects, `*this` included, that share ownership with `*this`, or 0 when `*this` is empty.
+Returns::
+  The number of `local_shared_ptr` objects, `*this` included, that share ownership with `*this`, or 0 when `*this` is empty.
 
 ### conversions
 ```
@@ -538,16 +545,28 @@ void swap(local_shared_ptr & b) noexcept;
 [none]
 * {blank}
 +
-Effects:: Exchanges the contents of the two smart pointers.
+Effects::
+  Exchanges the contents of the two smart pointers.
 
 ### owner_before
 ```
-template<class Y> bool owner_before(local_shared_ptr<Y> const & rhs) const noexcept;
+template<class Y> bool owner_before(local_shared_ptr<Y> const & r) const noexcept;
 ```
 [none]
 * {blank}
 +
-Effects:: See the description of `operator<`.
+Returns::
+  See the description of `operator<`.
+
+### owner_equals
+```
+template<class Y> bool owner_equals(local_shared_ptr<Y> const & r) const noexcept;
+```
+[none]
+* {blank}
++
+Returns::
+  `true` if and only if `*this` and `r` share ownership or are both empty.
 
 ## Free Functions
 
@@ -631,7 +650,8 @@ template<class T> void swap(local_shared_ptr<T> & a, local_shared_ptr<T> & b) no
 [none]
 * {blank}
 +
-Effects:: Equivalent to `a.swap(b)`.
+Effects::
+  Equivalent to `a.swap(b)`.
 
 ### get_pointer
 ```

doc/smart_ptr/make_unique.adoc

@@ -106,7 +106,7 @@ template<class T>
 +
 Constraints:: `T` is not an array.
 Returns:: `std::unique_ptr<T>(new T)`.
-Example:: `auto p = make_unique_noinit<double[1024]>();`
+Example:: `auto p = make_unique_noinit<std::array<double, 1024> >();`
 
 ```
 template<class T>

doc/smart_ptr/owner_equal_to.adoc

@@ -0,0 +1,45 @@
+////
+Copyright 2020 Peter Dimov
+Distributed under the Boost Software License, Version 1.0.
+https://www.boost.org/LICENSE_1_0.txt
+////
+
+[#owner_equal_to]
+# owner_equal_to
+:toc:
+:toc-title:
+:idprefix: owner_equal_to_
+
+## Description
+
+`owner_equal_to<T>` is a helper function object that compares two smart
+pointer objects using `owner_equals`.
+
+## Synopsis
+
+`owner_equal_to` is defined in `<boost/smart_ptr/owner_equal_to.hpp>`.
+
+```
+namespace boost {
+
+  template<class T = void> struct owner_equal_to
+  {
+    typedef bool result_type;
+    typedef T first_argument_type;
+    typedef T second_argument_type;
+
+    template<class U, class V> bool operator()( U const & u, V const & v ) const noexcept;
+  };
+}
+```
+
+## Members
+
+```
+template<class U, class V> bool operator()( U const & u, V const & v ) const noexcept;
+```
+[none]
+* {blank}
++
+Returns::
+  `u.owner_equals( v )`.

doc/smart_ptr/owner_hash.adoc

@@ -0,0 +1,56 @@
+////
+Copyright 2020 Peter Dimov
+Distributed under the Boost Software License, Version 1.0.
+https://www.boost.org/LICENSE_1_0.txt
+////
+
+[#owner_hash]
+# owner_hash
+:toc:
+:toc-title:
+:idprefix: owner_hash_to_
+
+## Description
+
+`owner_hash<T>` is a helper function object that takes a smart pointer `p`
+and returns `p.owner_hash_value()`. It's useful for creating unordered
+containers of `shared_ptr` that use ownership-based equality, instead of
+the default pointer value equality. (It can be used with `weak_ptr` too,
+but there's no need, because `boost::hash` and `std::hash` for `weak_ptr`
+already use ownership-based equality.)
+
+## Example
+
+```
+std::unordered_set< boost::shared_ptr<void>,
+  boost::owner_hash< boost::shared_ptr<void> >,
+  boost::owner_equal_to< boost::shared_ptr<void> > > set;
+```
+
+## Synopsis
+
+`owner_hash` is defined in `<boost/smart_ptr/owner_hash.hpp>`.
+
+```
+namespace boost {
+
+  template<class T> struct owner_hash
+  {
+    typedef std::size_t result_type;
+    typedef T argument_type;
+
+    std::size_t operator()( T const & p ) const noexcept;
+  };
+}
+```
+
+## Members
+
+```
+std::size_t operator()( T const & p ) const noexcept;
+```
+[none]
+* {blank}
++
+Returns::
+  `p.owner_hash_value()`.

doc/smart_ptr/owner_less.adoc

@@ -0,0 +1,50 @@
+////
+Copyright 2020 Peter Dimov
+Distributed under the Boost Software License, Version 1.0.
+https://www.boost.org/LICENSE_1_0.txt
+////
+
+[#owner_less]
+# owner_less
+:toc:
+:toc-title:
+:idprefix: owner_less_
+
+## Description
+
+`owner_less<T>` is a helper function object that compares two smart
+pointer objects using `owner_before`. It is only provided for compatibility
+with {cpp}11 and corresponds to the standard component of the same name.
+
+When using Boost smart pointers, the use of `owner_less` is unnecessary, as
+the supplied `operator<` overloads (and, correspondingly, `std::less`) return
+the same result.
+
+## Synopsis
+
+`owner_less` is defined in `<boost/smart_ptr/owner_less.hpp>`.
+
+```
+namespace boost {
+
+  template<class T = void> struct owner_less
+  {
+    typedef bool result_type;
+    typedef T first_argument_type;
+    typedef T second_argument_type;
+
+    template<class U, class V> bool operator()( U const & u, V const & v ) const noexcept;
+  };
+}
+```
+
+## Members
+
+```
+template<class U, class V> bool operator()( U const & u, V const & v ) const noexcept;
+```
+[none]
+* {blank}
++
+Returns::
+  `u.owner_before( v )`.

doc/smart_ptr/shared_ptr.adoc

@@ -178,8 +178,13 @@ namespace boost {
 
     void swap(shared_ptr & b) noexcept;
 
-    template<class Y> bool owner_before(shared_ptr<Y> const & rhs) const noexcept;
-    template<class Y> bool owner_before(weak_ptr<Y> const & rhs) const noexcept;
+    template<class Y> bool owner_before(shared_ptr<Y> const & r) const noexcept;
+    template<class Y> bool owner_before(weak_ptr<Y> const & r) const noexcept;
+
+    template<class Y> bool owner_equals(shared_ptr<Y> const & r) const noexcept;
+    template<class Y> bool owner_equals(weak_ptr<Y> const & r) const noexcept;
+
+    std::size_t owner_hash_value() const noexcept;
   };
 
   template<class T, class U>
@@ -560,7 +565,8 @@ template<class Y> void reset(shared_ptr<Y> && r, element_type * p) noexcept;
 [none]
 * {blank}
 +
-Effects:: Equivalent to `shared_ptr(std::move(r), p).swap(*this)`.
+Effects::
+  Equivalent to `shared_ptr(std::move(r), p).swap(*this)`.
 
 ### indirection
 ```
@@ -598,7 +604,8 @@ element_type * get() const noexcept;
 [none]
 * {blank}
 +
-Returns:: The stored pointer.
+Returns::
+  The stored pointer.
 
 ### unique
 ```
@@ -607,7 +614,8 @@ bool unique() const noexcept;
 [none]
 * {blank}
 +
-Returns:: `use_count() == 1`.
+Returns::
+  `use_count() == 1`.
 
 ### use_count
 ```
@@ -616,7 +624,8 @@ long use_count() const noexcept;
 [none]
 * {blank}
 +
-Returns:: The number of `shared_ptr` objects, `*this` included, that share ownership with `*this`, or 0 when `*this` is empty.
+Returns::
+  The number of `shared_ptr` objects, `*this` included, that share ownership with `*this`, or 0 when `*this` is empty.
 
 ### conversions
 ```
@@ -641,19 +650,45 @@ void swap(shared_ptr & b) noexcept;
 [none]
 * {blank}
 +
-Effects:: Exchanges the contents of the two smart pointers.
+Effects::
+  Exchanges the contents of the two smart pointers.
 
 ### owner_before
 ```
-template<class Y> bool owner_before(shared_ptr<Y> const & rhs) const noexcept;
+template<class Y> bool owner_before(shared_ptr<Y> const & r) const noexcept;
 ```
 ```
-template<class Y> bool owner_before(weak_ptr<Y> const & rhs) const noexcept;
+template<class Y> bool owner_before(weak_ptr<Y> const & r) const noexcept;
 ```
 [none]
 * {blank}
 +
-Effects:: See the description of `operator<`.
+Returns::
+  See the description of `operator<`.
+
+### owner_equals
+```
+template<class Y> bool owner_equals(shared_ptr<Y> const & r) const noexcept;
+```
+```
+template<class Y> bool owner_equals(weak_ptr<Y> const & r) const noexcept;
+```
+[none]
+* {blank}
++
+Returns::
+  `true` if and only if `*this` and `r` share ownership or are both empty.
+
+### owner_hash_value
+```
+std::size_t owner_hash_value() const noexcept;
+```
+[none]
+* {blank}
++
+Returns::
+  An unspecified hash value such that two instances that share ownership
+  have the same hash value.
 
 ## Free Functions
 
@@ -721,7 +756,8 @@ template<class T> void swap(shared_ptr<T> & a, shared_ptr<T> & b) noexcept;
 [none]
 * {blank}
 +
-Effects:: Equivalent to `a.swap(b)`.
+Effects::
+  Equivalent to `a.swap(b)`.
 
 ### get_pointer
 ```
@@ -805,7 +841,8 @@ template<class D, class T>
 [none]
 * {blank}
 +
-Returns:: If `*this` owns a deleter `d` of type (cv-unqualified) `D`, returns `&d`; otherwise returns 0.
+Returns::
+  If `*this` owns a deleter `d` of type (cv-unqualified) `D`, returns `&d`; otherwise returns 0.
 
 ### Atomic Access
 

doc/smart_ptr/weak_ptr.adoc

@@ -112,6 +112,11 @@ namespace boost {
 
     template<class Y> bool owner_before( weak_ptr<Y> const & r ) const noexcept;
     template<class Y> bool owner_before( shared_ptr<Y> const & r ) const noexcept;
+
+    template<class Y> bool owner_equals( weak_ptr<Y> const & r ) const noexcept;
+    template<class Y> bool owner_equals( shared_ptr<Y> const & r ) const noexcept;
+
+    std::size_t owner_hash_value() const noexcept;
   };
 
   template<class T, class U>
@@ -185,7 +190,8 @@ NOTE: These constructors are an extension, not present in `std::weak_ptr`.
 [none]
 * {blank}
 +
-Effects:: Destroys this `weak_ptr` but has no effect on the object its stored pointer points to.
+Effects::
+  Destroys this `weak_ptr` but has no effect on the object its stored pointer points to.
 
 ### assignment
 ```
@@ -214,7 +220,8 @@ long use_count() const noexcept;
 [none]
 * {blank}
 +
-Returns:: 0 if `*this` is empty; otherwise, the number of `shared_ptr` objects that share ownership with `*this`.
+Returns::
+  0 if `*this` is empty; otherwise, the number of `shared_ptr` objects that share ownership with `*this`.
 
 ### expired
 ```
@@ -223,7 +230,8 @@ bool expired() const noexcept;
 [none]
 * {blank}
 +
-Returns:: `use_count() == 0`.
+Returns::
+  `use_count() == 0`.
 
 ### empty
 ```
@@ -243,7 +251,8 @@ shared_ptr<T> lock() const noexcept;
 [none]
 * {blank}
 +
-Returns:: `expired()? shared_ptr<T>(): shared_ptr<T>(*this)`.
+Returns::
+  `expired()? shared_ptr<T>(): shared_ptr<T>(*this)`.
 
 ### reset
 ```
@@ -252,7 +261,8 @@ void reset() noexcept;
 [none]
 * {blank}
 +
-Effects:: Equivalent to `weak_ptr().swap(*this)`.
+Effects::
+  Equivalent to `weak_ptr().swap(*this)`.
 
 ### swap
 ```
@@ -261,8 +271,10 @@ void swap(weak_ptr & b) noexcept;
 [none]
 * {blank}
 +
-Effects:: Exchanges the contents of the two smart pointers.
+Effects::
+  Exchanges the contents of the two smart pointers.
 
+### owner_before
 ```
 template<class Y> bool owner_before( weak_ptr<Y> const & r ) const noexcept;
 ```
@@ -272,7 +284,32 @@ template<class Y> bool owner_before( shared_ptr<Y> const & r ) const noexcept;
 [none]
 * {blank}
 +
-Returns:: See the description of `operator<`.
+Returns::
+  See the description of `operator<`.
+
+### owner_equals
+```
+template<class Y> bool owner_equals( weak_ptr<Y> const & r ) const noexcept;
+```
+```
+template<class Y> bool owner_equals( shared_ptr<Y> const & r ) const noexcept;
+```
+[none]
+* {blank}
++
+Returns::
+  `true` if and only if `*this` and `r` share ownership or are both empty.
+
+### owner_hash_value
+```
+std::size_t owner_hash_value() const noexcept;
+```
+[none]
+* {blank}
++
+Returns::
+  An unspecified hash value such that two instances that share ownership
+  have the same hash value.
 
 ## Free Functions
 
@@ -298,7 +335,8 @@ template<class T> void swap(weak_ptr<T> & a, weak_ptr<T> & b) noexcept;
 [none]
 * {blank}
 +
-Effects:: Equivalent to `a.swap(b)`.
+Effects::
+  Equivalent to `a.swap(b)`.
 
 ## Frequently Asked Questions
 

extras/src/sp_debug_hooks.cpp

@@ -73,7 +73,7 @@ void * operator new(size_t n) throw(bad_alloc)
     return p;
 }
 
-#if !defined(__BORLANDC__) || (__BORLANDC__ > 0x551)
+#if !defined(BOOST_BORLANDC) || (BOOST_BORLANDC > 0x551)
 
 void * operator new(size_t n, nothrow_t const &) throw()
 {
@@ -95,7 +95,7 @@ void * operator new[](size_t n) throw(bad_alloc)
     return p;
 }
 
-#if !defined(__BORLANDC__) || (__BORLANDC__ > 0x551)
+#if !defined(BOOST_BORLANDC) || (BOOST_BORLANDC > 0x551)
 
 void * operator new[](size_t n, nothrow_t const &) throw()
 {
@@ -205,7 +205,7 @@ void operator delete(void * p) throw()
     free(pm);
 }
 
-#if !defined(__BORLANDC__) || (__BORLANDC__ > 0x551)
+#if !defined(BOOST_BORLANDC) || (BOOST_BORLANDC > 0x551)
 
 void operator delete(void * p, nothrow_t const &) throw()
 {
@@ -231,7 +231,7 @@ void operator delete[](void * p) throw()
     free(pm);
 }
 
-#if !defined(__BORLANDC__) || (__BORLANDC__ > 0x551)
+#if !defined(BOOST_BORLANDC) || (BOOST_BORLANDC > 0x551)
 
 void operator delete[](void * p, nothrow_t const &) throw()
 {

include/boost/detail/lightweight_thread.hpp

@@ -21,168 +21,6 @@
 //  template<class F> int lw_thread_create( lw_thread_t & th, F f );
 //  void lw_thread_join( lw_thread_t th );
 
-
-#include <boost/config.hpp>
-#include <memory>
-#include <cerrno>
-
-#if defined( BOOST_HAS_PTHREADS )
-
-#include <pthread.h>
-
-namespace boost
-{
-namespace detail
-{
-
-typedef ::pthread_t lw_thread_t;
-
-inline int lw_thread_create_( lw_thread_t* thread, const pthread_attr_t* attr, void* (*start_routine)( void* ), void* arg )
-{
-    return ::pthread_create( thread, attr, start_routine, arg );
-}
-
-inline void lw_thread_join( lw_thread_t th )
-{
-    ::pthread_join( th, 0 );
-}
-
-} // namespace detail
-} // namespace boost
-
-#else // defined( BOOST_HAS_PTHREADS )
-
-#include <windows.h>
-#include <process.h>
-
-namespace boost
-{
-namespace detail
-{
-
-typedef HANDLE lw_thread_t;
-
-inline int lw_thread_create_( lw_thread_t * thread, void const *, unsigned (__stdcall * start_routine) (void*), void* arg )
-{
-    HANDLE h = (HANDLE)_beginthreadex( 0, 0, start_routine, arg, 0, 0 );
-
-    if( h != 0 )
-    {
-        *thread = h;
-        return 0;
-    }
-    else
-    {
-        return EAGAIN;
-    }
-}
-
-inline void lw_thread_join( lw_thread_t thread )
-{
-    ::WaitForSingleObject( thread, INFINITE );
-    ::CloseHandle( thread );
-}
-
-} // namespace detail
-} // namespace boost
-
-#endif // defined( BOOST_HAS_PTHREADS )
-
-
-namespace boost
-{
-namespace detail
-{
-
-class lw_abstract_thread
-{
-public:
-
-    virtual ~lw_abstract_thread() {}
-    virtual void run() = 0;
-};
-
-#if defined( BOOST_HAS_PTHREADS )
-
-extern "C" void * lw_thread_routine( void * pv )
-{
-#if defined(BOOST_NO_CXX11_SMART_PTR)
-
-    std::auto_ptr<lw_abstract_thread> pt( static_cast<lw_abstract_thread *>( pv ) );
-
-#else
-
-    std::unique_ptr<lw_abstract_thread> pt( static_cast<lw_abstract_thread *>( pv ) );
-
-#endif
-
-    pt->run();
-
-    return 0;
-}
-
-#else
-
-unsigned __stdcall lw_thread_routine( void * pv )
-{
-#if defined(BOOST_NO_CXX11_SMART_PTR)
-
-    std::auto_ptr<lw_abstract_thread> pt( static_cast<lw_abstract_thread *>( pv ) );
-
-#else
-
-    std::unique_ptr<lw_abstract_thread> pt( static_cast<lw_abstract_thread *>( pv ) );
-
-#endif
-
-    pt->run();
-
-    return 0;
-}
-
-#endif
-
-template<class F> class lw_thread_impl: public lw_abstract_thread
-{
-public:
-
-    explicit lw_thread_impl( F f ): f_( f )
-    {
-    }
-
-    void run()
-    {
-        f_();
-    }
-
-private:
-
-    F f_;
-};
-
-template<class F> int lw_thread_create( lw_thread_t & th, F f )
-{
-#if defined(BOOST_NO_CXX11_SMART_PTR)
-
-    std::auto_ptr<lw_abstract_thread> p( new lw_thread_impl<F>( f ) );
-
-#else
-
-    std::unique_ptr<lw_abstract_thread> p( new lw_thread_impl<F>( f ) );
-
-#endif
-
-    int r = lw_thread_create_( &th, 0, lw_thread_routine, p.get() );
-
-    if( r == 0 )
-    {
-        p.release();
-    }
-
-    return r;
-}
-
-} // namespace detail
-} // namespace boost
+#include <boost/smart_ptr/detail/lightweight_thread.hpp>
 
 #endif // #ifndef BOOST_DETAIL_LIGHTWEIGHT_THREAD_HPP_INCLUDED

include/boost/smart_ptr/allocate_local_shared_array.hpp

@@ -21,11 +21,12 @@ public:
         count_ = shared_count(base);
     }
 
-    virtual void local_cb_destroy() BOOST_SP_NOEXCEPT {
+    void local_cb_destroy() BOOST_SP_NOEXCEPT BOOST_OVERRIDE {
         shared_count().swap(count_);
     }
 
-    virtual shared_count local_cb_get_shared_count() const BOOST_SP_NOEXCEPT {
+    shared_count local_cb_get_shared_count() const
+        BOOST_SP_NOEXCEPT BOOST_OVERRIDE {
         return count_;
     }
 
@@ -73,7 +74,7 @@ inline typename enable_if_<is_unbounded_array<T>::value,
 allocate_local_shared(const A& allocator, std::size_t count)
 {
     typedef typename detail::sp_array_element<T>::type element;
-    typedef typename detail::sp_bind_allocator<A, element>::type other;
+    typedef typename allocator_rebind<A, element>::type other;
     typedef detail::lsp_array_state<other> state;
     typedef detail::sp_array_base<state> base;
     detail::sp_array_result<other, base> result(allocator, count);
@@ -96,7 +97,7 @@ allocate_local_shared(const A& allocator)
         count = extent<T>::value
     };
     typedef typename detail::sp_array_element<T>::type element;
-    typedef typename detail::sp_bind_allocator<A, element>::type other;
+    typedef typename allocator_rebind<A, element>::type other;
     typedef detail::lsp_size_array_state<other, count> state;
     typedef detail::sp_array_base<state> base;
     detail::sp_array_result<other, base> result(allocator, count);
@@ -117,7 +118,7 @@ allocate_local_shared(const A& allocator, std::size_t count,
     const typename remove_extent<T>::type& value)
 {
     typedef typename detail::sp_array_element<T>::type element;
-    typedef typename detail::sp_bind_allocator<A, element>::type other;
+    typedef typename allocator_rebind<A, element>::type other;
     typedef detail::lsp_array_state<other> state;
     typedef detail::sp_array_base<state> base;
     detail::sp_array_result<other, base> result(allocator, count);
@@ -141,7 +142,7 @@ allocate_local_shared(const A& allocator,
         count = extent<T>::value
     };
     typedef typename detail::sp_array_element<T>::type element;
-    typedef typename detail::sp_bind_allocator<A, element>::type other;
+    typedef typename allocator_rebind<A, element>::type other;
     typedef detail::lsp_size_array_state<other, count> state;
     typedef detail::sp_array_base<state> base;
     detail::sp_array_result<other, base> result(allocator, count);

include/boost/smart_ptr/allocate_shared_array.hpp

@@ -8,6 +8,7 @@ Distributed under the Boost Software License, Version 1.0.
 #ifndef BOOST_SMART_PTR_ALLOCATE_SHARED_ARRAY_HPP
 #define BOOST_SMART_PTR_ALLOCATE_SHARED_ARRAY_HPP
 
+#include <boost/core/allocator_access.hpp>
 #include <boost/core/alloc_construct.hpp>
 #include <boost/core/first_scalar.hpp>
 #include <boost/smart_ptr/shared_ptr.hpp>
@@ -57,18 +58,6 @@ struct sp_align_up {
     };
 };
 
-#if !defined(BOOST_NO_CXX11_ALLOCATOR)
-template<class A, class T>
-struct sp_bind_allocator {
-    typedef typename std::allocator_traits<A>::template rebind_alloc<T> type;
-};
-#else
-template<class A, class T>
-struct sp_bind_allocator {
-    typedef typename A::template rebind<T>::other type;
-};
-#endif
-
 template<class T>
 BOOST_CONSTEXPR inline std::size_t
 sp_objects(std::size_t size) BOOST_SP_NOEXCEPT
@@ -171,7 +160,7 @@ public:
     }
 
 private:
-    typename sp_bind_allocator<A, type>::type other_;
+    typename boost::allocator_rebind<A, type>::type other_;
     std::size_t size_;
 };
 
@@ -206,28 +195,29 @@ public:
         return state_;
     }
 
-    virtual void dispose() BOOST_SP_NOEXCEPT {
+    void dispose() BOOST_SP_NOEXCEPT BOOST_OVERRIDE {
         boost::alloc_destroy_n(state_.allocator(),
             boost::first_scalar(sp_array_start<type>(this)),
             state_.size() * sp_array_count<type>::value);
     }
 
-    virtual void destroy() BOOST_SP_NOEXCEPT {
+    void destroy() BOOST_SP_NOEXCEPT BOOST_OVERRIDE {
         sp_array_creator<allocator, sp_array_base> other(state_.allocator(),
             state_.size());
         this->~sp_array_base();
         other.destroy(this);
     }
 
-    virtual void* get_deleter(const sp_typeinfo_&) BOOST_SP_NOEXCEPT {
+    void* get_deleter(const sp_typeinfo_&) BOOST_SP_NOEXCEPT BOOST_OVERRIDE {
         return 0;
     }
 
-    virtual void* get_local_deleter(const sp_typeinfo_&) BOOST_SP_NOEXCEPT {
+    void* get_local_deleter(const sp_typeinfo_&)
+        BOOST_SP_NOEXCEPT BOOST_OVERRIDE {
         return 0;
     }
 
-    virtual void* get_untyped_deleter() BOOST_SP_NOEXCEPT {
+    void* get_untyped_deleter() BOOST_SP_NOEXCEPT BOOST_OVERRIDE {
         return 0;
     }
 
@@ -272,7 +262,7 @@ inline typename enable_if_<is_unbounded_array<T>::value, shared_ptr<T> >::type
 allocate_shared(const A& allocator, std::size_t count)
 {
     typedef typename detail::sp_array_element<T>::type element;
-    typedef typename detail::sp_bind_allocator<A, element>::type other;
+    typedef typename allocator_rebind<A, element>::type other;
     typedef detail::sp_array_state<other> state;
     typedef detail::sp_array_base<state> base;
     detail::sp_array_result<other, base> result(allocator, count);
@@ -292,7 +282,7 @@ allocate_shared(const A& allocator)
         count = extent<T>::value
     };
     typedef typename detail::sp_array_element<T>::type element;
-    typedef typename detail::sp_bind_allocator<A, element>::type other;
+    typedef typename allocator_rebind<A, element>::type other;
     typedef detail::sp_size_array_state<other, extent<T>::value> state;
     typedef detail::sp_array_base<state> base;
     detail::sp_array_result<other, base> result(allocator, count);
@@ -310,7 +300,7 @@ allocate_shared(const A& allocator, std::size_t count,
     const typename remove_extent<T>::type& value)
 {
     typedef typename detail::sp_array_element<T>::type element;
-    typedef typename detail::sp_bind_allocator<A, element>::type other;
+    typedef typename allocator_rebind<A, element>::type other;
     typedef detail::sp_array_state<other> state;
     typedef detail::sp_array_base<state> base;
     detail::sp_array_result<other, base> result(allocator, count);
@@ -331,7 +321,7 @@ allocate_shared(const A& allocator,
         count = extent<T>::value
     };
     typedef typename detail::sp_array_element<T>::type element;
-    typedef typename detail::sp_bind_allocator<A, element>::type other;
+    typedef typename allocator_rebind<A, element>::type other;
     typedef detail::sp_size_array_state<other, extent<T>::value> state;
     typedef detail::sp_array_base<state> base;
     detail::sp_array_result<other, base> result(allocator, count);

include/boost/smart_ptr/allocate_unique.hpp

@@ -10,6 +10,7 @@ Distributed under the Boost Software License, Version 1.0.
 
 #include <boost/smart_ptr/detail/sp_noexcept.hpp>
 #include <boost/smart_ptr/detail/sp_nullptr_t.hpp>
+#include <boost/core/allocator_access.hpp>
 #include <boost/core/alloc_construct.hpp>
 #include <boost/core/empty_value.hpp>
 #include <boost/core/first_scalar.hpp>
@@ -61,30 +62,6 @@ struct sp_alloc_value {
         boost::remove_extent<T>::type>::type type;
 };
 
-#if !defined(BOOST_NO_CXX11_ALLOCATOR)
-template<class A, class T>
-struct sp_alloc_to {
-    typedef typename std::allocator_traits<A>::template rebind_alloc<T> type;
-};
-#else
-template<class A, class T>
-struct sp_alloc_to {
-    typedef typename A::template rebind<T>::other type;
-};
-#endif
-
-#if !defined(BOOST_NO_CXX11_ALLOCATOR)
-template<class A>
-struct sp_alloc_type {
-    typedef typename std::allocator_traits<A>::pointer type;
-};
-#else
-template<class A>
-struct sp_alloc_type {
-    typedef typename A::pointer type;
-};
-#endif
-
 template<class T, class P>
 class sp_alloc_ptr {
 public:
@@ -296,7 +273,7 @@ operator!=(detail::sp_nullptr_t,
 
 template<class A>
 inline void
-sp_alloc_clear(A& a, typename sp_alloc_type<A>::type p, std::size_t,
+sp_alloc_clear(A& a, typename boost::allocator_pointer<A>::type p, std::size_t,
     boost::false_type)
 {
     boost::alloc_destroy(a, boost::to_address(p));
@@ -304,8 +281,8 @@ sp_alloc_clear(A& a, typename sp_alloc_type<A>::type p, std::size_t,
 
 template<class A>
 inline void
-sp_alloc_clear(A& a, typename sp_alloc_type<A>::type p, std::size_t n,
-    boost::true_type)
+sp_alloc_clear(A& a, typename boost::allocator_pointer<A>::type p,
+    std::size_t n, boost::true_type)
 {
 #if defined(BOOST_MSVC) && BOOST_MSVC < 1800
     if (!p) {
@@ -320,15 +297,15 @@ sp_alloc_clear(A& a, typename sp_alloc_type<A>::type p, std::size_t n,
 
 template<class T, class A>
 class alloc_deleter
-    : empty_value<typename detail::sp_alloc_to<A,
+    : empty_value<typename allocator_rebind<A,
         typename detail::sp_alloc_value<T>::type>::type> {
-    typedef typename detail::sp_alloc_to<A,
+    typedef typename allocator_rebind<A,
         typename detail::sp_alloc_value<T>::type>::type allocator;
     typedef empty_value<allocator> base;
 
 public:
     typedef detail::sp_alloc_ptr<T,
-        typename detail::sp_alloc_type<allocator>::type> pointer;
+        typename allocator_pointer<allocator>::type> pointer;
 
     explicit alloc_deleter(const allocator& a) BOOST_SP_NOEXCEPT
         : base(empty_init_t(), a) { }
@@ -349,7 +326,7 @@ namespace detail {
 template<class T, class A>
 class sp_alloc_make {
 public:
-    typedef typename sp_alloc_to<A,
+    typedef typename boost::allocator_rebind<A,
         typename sp_alloc_value<T>::type>::type allocator;
 
 private:
@@ -384,7 +361,7 @@ public:
     }
 
 private:
-    typedef typename sp_alloc_type<allocator>::type pointer;
+    typedef typename boost::allocator_pointer<allocator>::type pointer;
 
     allocator a_;
     std::size_t n_;

include/boost/smart_ptr/bad_weak_ptr.hpp

@@ -20,7 +20,7 @@
 #include <boost/config.hpp>
 #include <exception>
 
-#ifdef __BORLANDC__
+#ifdef BOOST_BORLANDC
 # pragma warn -8026     // Functions with excep. spec. are not expanded inline
 #endif
 
@@ -33,7 +33,7 @@ namespace boost
 // is compiled with -ps, the compiler issues an error.
 // Hence, the temporary #pragma option -pc below.
 
-#if defined(__BORLANDC__) && __BORLANDC__ <= 0x564
+#if defined(BOOST_BORLANDC) && BOOST_BORLANDC <= 0x564
 # pragma option push -pc
 #endif
 
@@ -47,7 +47,7 @@ class bad_weak_ptr: public std::exception
 {
 public:
 
-    virtual char const * what() const BOOST_NOEXCEPT_OR_NOTHROW
+    char const * what() const BOOST_NOEXCEPT_OR_NOTHROW BOOST_OVERRIDE
     {
         return "tr1::bad_weak_ptr";
     }
@@ -57,13 +57,13 @@ public:
 # pragma clang diagnostic pop
 #endif
 
-#if defined(__BORLANDC__) && __BORLANDC__ <= 0x564
+#if defined(BOOST_BORLANDC) && BOOST_BORLANDC <= 0x564
 # pragma option pop
 #endif
 
 } // namespace boost
 
-#ifdef __BORLANDC__
+#ifdef BOOST_BORLANDC
 # pragma warn .8026     // Functions with excep. spec. are not expanded inline
 #endif
 

include/boost/smart_ptr/detail/atomic_count.hpp

@@ -43,8 +43,9 @@
 //    Memory Ordering: acquire/release
 //
 
+#include <boost/smart_ptr/detail/sp_has_gcc_intrinsics.hpp>
+#include <boost/smart_ptr/detail/sp_has_sync_intrinsics.hpp>
 #include <boost/config.hpp>
-#include <boost/smart_ptr/detail/sp_has_sync.hpp>
 
 #if defined( BOOST_AC_DISABLE_THREADS )
 # include <boost/smart_ptr/detail/atomic_count_nt.hpp>
@@ -73,15 +74,18 @@
 #elif defined( BOOST_DISABLE_THREADS ) && !defined( BOOST_SP_ENABLE_THREADS ) && !defined( BOOST_DISABLE_WIN32 )
 # include <boost/smart_ptr/detail/atomic_count_nt.hpp>
 
+#elif defined( BOOST_SP_HAS_GCC_INTRINSICS )
+# include <boost/smart_ptr/detail/atomic_count_gcc_atomic.hpp>
+
 #elif !defined( BOOST_NO_CXX11_HDR_ATOMIC )
 # include <boost/smart_ptr/detail/atomic_count_std_atomic.hpp>
 
+#elif defined( BOOST_SP_HAS_SYNC_INTRINSICS )
+# include <boost/smart_ptr/detail/atomic_count_sync.hpp>
+
 #elif defined( __GNUC__ ) && ( defined( __i386__ ) || defined( __x86_64__ ) ) && !defined( __PATHSCALE__ )
 # include <boost/smart_ptr/detail/atomic_count_gcc_x86.hpp>
 
-#elif defined( BOOST_SP_HAS_SYNC )
-# include <boost/smart_ptr/detail/atomic_count_sync.hpp>
-
 #elif defined(WIN32) || defined(_WIN32) || defined(__WIN32__) || defined(__CYGWIN__)
 # include <boost/smart_ptr/detail/atomic_count_win32.hpp>
 

include/boost/smart_ptr/detail/atomic_count_gcc.hpp

@@ -23,6 +23,13 @@
 # include <bits/atomicity.h>
 #endif
 
+#if defined(BOOST_SP_REPORT_IMPLEMENTATION)
+
+#include <boost/config/pragma_message.hpp>
+BOOST_PRAGMA_MESSAGE("Using libstdc++ atomic_count")
+
+#endif
+
 namespace boost
 {
 

include/boost/smart_ptr/detail/atomic_count_gcc_atomic.hpp

@@ -0,0 +1,63 @@
+#ifndef BOOST_SMART_PTR_DETAIL_ATOMIC_COUNT_GCC_ATOMIC_HPP_INCLUDED
+#define BOOST_SMART_PTR_DETAIL_ATOMIC_COUNT_GCC_ATOMIC_HPP_INCLUDED
+
+// boost/detail/atomic_count_gcc_atomic.hpp
+//
+// atomic_count for g++ 4.7+
+//
+// Copyright 2007, 2020 Peter Dimov
+//
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+
+#include <boost/cstdint.hpp>
+
+#if defined(BOOST_SP_REPORT_IMPLEMENTATION)
+
+#include <boost/config/pragma_message.hpp>
+BOOST_PRAGMA_MESSAGE("Using __atomic atomic_count")
+
+#endif
+
+namespace boost
+{
+
+namespace detail
+{
+
+class atomic_count
+{
+public:
+
+    explicit atomic_count( long v ): value_( static_cast< boost::int_least32_t >( v ) )
+    {
+    }
+
+    long operator++()
+    {
+        return __atomic_add_fetch( &value_, +1, __ATOMIC_ACQ_REL );
+    }
+
+    long operator--()
+    {
+        return __atomic_add_fetch( &value_, -1, __ATOMIC_ACQ_REL );
+    }
+
+    operator long() const
+    {
+        return __atomic_load_n( &value_, __ATOMIC_ACQUIRE );
+    }
+
+private:
+
+    atomic_count(atomic_count const &);
+    atomic_count & operator=(atomic_count const &);
+
+    boost::int_least32_t value_;
+};
+
+} // namespace detail
+
+} // namespace boost
+
+#endif // #ifndef BOOST_SMART_PTR_DETAIL_ATOMIC_COUNT_GCC_ATOMIC_HPP_INCLUDED

include/boost/smart_ptr/detail/atomic_count_gcc_x86.hpp

@@ -13,6 +13,17 @@
 //  http://www.boost.org/LICENSE_1_0.txt)
 //
 
+#include <boost/smart_ptr/detail/sp_obsolete.hpp>
+
+#if defined(BOOST_SP_REPORT_IMPLEMENTATION)
+
+#include <boost/config/pragma_message.hpp>
+BOOST_PRAGMA_MESSAGE("Using g++/x86 atomic_count")
+
+#endif
+
+BOOST_SP_OBSOLETE()
+
 namespace boost
 {
 

include/boost/smart_ptr/detail/atomic_count_nt.hpp

@@ -15,6 +15,13 @@
 //  http://www.boost.org/LICENSE_1_0.txt
 //
 
+#if defined(BOOST_SP_REPORT_IMPLEMENTATION)
+
+#include <boost/config/pragma_message.hpp>
+BOOST_PRAGMA_MESSAGE("Using single-threaded, non-atomic atomic_count")
+
+#endif
+
 namespace boost
 {
 

include/boost/smart_ptr/detail/atomic_count_pt.hpp

@@ -14,6 +14,13 @@
 #include <boost/assert.hpp>
 #include <pthread.h>
 
+#if defined(BOOST_SP_REPORT_IMPLEMENTATION)
+
+#include <boost/config/pragma_message.hpp>
+BOOST_PRAGMA_MESSAGE("Using pthread_mutex atomic_count")
+
+#endif
+
 //
 //  The generic pthread_mutex-based implementation sometimes leads to
 //    inefficiencies. Example: a class with two atomic_count members

include/boost/smart_ptr/detail/atomic_count_solaris.hpp

@@ -1,59 +0,0 @@
-#ifndef BOOST_SMART_PTR_DETAIL_ATOMIC_COUNT_SOLARIS_HPP_INCLUDED
-#define BOOST_SMART_PTR_DETAIL_ATOMIC_COUNT_SOLARIS_HPP_INCLUDED
-
-//
-//  boost/detail/atomic_count_solaris.hpp
-//   based on: boost/detail/atomic_count_win32.hpp
-//
-//  Copyright (c) 2001-2005 Peter Dimov
-//  Copyright (c) 2006 Michael van der Westhuizen
-//
-// Distributed under the Boost Software License, Version 1.0. (See
-// accompanying file LICENSE_1_0.txt or copy at
-// http://www.boost.org/LICENSE_1_0.txt)
-//
-
-#include <atomic.h>
-
-namespace boost
-{
-
-namespace detail
-{
-
-class atomic_count
-{
-public:
-
-    explicit atomic_count( uint32_t v ): value_( v )
-    {
-    }
-
-    long operator++()
-    {
-        return atomic_inc_32_nv( &value_ );
-    }
-
-    long operator--()
-    {
-        return atomic_dec_32_nv( &value_ );
-    }
-
-    operator uint32_t() const
-    {
-        return static_cast<uint32_t const volatile &>( value_ );
-    }
-
-private:
-
-    atomic_count( atomic_count const & );
-    atomic_count & operator=( atomic_count const & );
-
-    uint32_t value_;
-};
-
-} // namespace detail
-
-} // namespace boost
-
-#endif // #ifndef BOOST_SMART_PTR_DETAIL_ATOMIC_COUNT_SOLARIS_HPP_INCLUDED

include/boost/smart_ptr/detail/atomic_count_spin.hpp

@@ -13,6 +13,13 @@
 
 #include <boost/smart_ptr/detail/spinlock_pool.hpp>
 
+#if defined(BOOST_SP_REPORT_IMPLEMENTATION)
+
+#include <boost/config/pragma_message.hpp>
+BOOST_PRAGMA_MESSAGE("Using spinlock-based atomic_count")
+
+#endif
+
 namespace boost
 {
 

include/boost/smart_ptr/detail/atomic_count_std_atomic.hpp

@@ -16,6 +16,13 @@
 #include <atomic>
 #include <cstdint>
 
+#if defined(BOOST_SP_REPORT_IMPLEMENTATION)
+
+#include <boost/config/pragma_message.hpp>
+BOOST_PRAGMA_MESSAGE("Using std::atomic atomic_count")
+
+#endif
+
 namespace boost
 {
 

include/boost/smart_ptr/detail/atomic_count_sync.hpp

@@ -15,10 +15,19 @@
 //  http://www.boost.org/LICENSE_1_0.txt)
 //
 
+#include <boost/cstdint.hpp>
+
 #if defined( __ia64__ ) && defined( __INTEL_COMPILER )
 # include <ia64intrin.h>
 #endif
 
+#if defined(BOOST_SP_REPORT_IMPLEMENTATION)
+
+#include <boost/config/pragma_message.hpp>
+BOOST_PRAGMA_MESSAGE("Using __sync atomic_count")
+
+#endif
+
 namespace boost
 {
 
@@ -29,7 +38,9 @@ class atomic_count
 {
 public:
 
-    explicit atomic_count( long v ) : value_( v ) {}
+    explicit atomic_count( long v ): value_( static_cast< boost::int_least32_t >( v ) )
+    {
+    }
 
     long operator++()
     {
@@ -51,7 +62,7 @@ private:
     atomic_count(atomic_count const &);
     atomic_count & operator=(atomic_count const &);
 
-    mutable long value_;
+    mutable boost::int_least32_t value_;
 };
 
 } // namespace detail

include/boost/smart_ptr/detail/atomic_count_win32.hpp

@@ -19,6 +19,13 @@
 
 #include <boost/smart_ptr/detail/sp_interlocked.hpp>
 
+#if defined(BOOST_SP_REPORT_IMPLEMENTATION)
+
+#include <boost/config/pragma_message.hpp>
+BOOST_PRAGMA_MESSAGE("Using Win32 atomic_count")
+
+#endif
+
 namespace boost
 {
 

include/boost/smart_ptr/detail/lightweight_thread.hpp

@@ -0,0 +1,188 @@
+#ifndef BOOST_SMART_PTR_DETAIL_LIGHTWEIGHT_THREAD_HPP_INCLUDED
+#define BOOST_SMART_PTR_DETAIL_LIGHTWEIGHT_THREAD_HPP_INCLUDED
+
+// MS compatible compilers support #pragma once
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
+#endif
+
+//  boost/detail/lightweight_thread.hpp
+//
+//  Copyright (c) 2002 Peter Dimov and Multi Media Ltd.
+//  Copyright (c) 2008, 2018 Peter Dimov
+//
+//  Distributed under the Boost Software License, Version 1.0.
+//  See accompanying file LICENSE_1_0.txt or copy at
+//  http://www.boost.org/LICENSE_1_0.txt
+//
+//
+//  typedef /*...*/ lw_thread_t; // as pthread_t
+//  template<class F> int lw_thread_create( lw_thread_t & th, F f );
+//  void lw_thread_join( lw_thread_t th );
+
+
+#include <boost/config.hpp>
+#include <memory>
+#include <cerrno>
+
+#if defined( BOOST_HAS_PTHREADS )
+
+#include <pthread.h>
+
+namespace boost
+{
+namespace detail
+{
+
+typedef ::pthread_t lw_thread_t;
+
+inline int lw_thread_create_( lw_thread_t* thread, const pthread_attr_t* attr, void* (*start_routine)( void* ), void* arg )
+{
+    return ::pthread_create( thread, attr, start_routine, arg );
+}
+
+inline void lw_thread_join( lw_thread_t th )
+{
+    ::pthread_join( th, 0 );
+}
+
+} // namespace detail
+} // namespace boost
+
+#else // defined( BOOST_HAS_PTHREADS )
+
+#include <windows.h>
+#include <process.h>
+
+namespace boost
+{
+namespace detail
+{
+
+typedef HANDLE lw_thread_t;
+
+inline int lw_thread_create_( lw_thread_t * thread, void const *, unsigned (__stdcall * start_routine) (void*), void* arg )
+{
+    HANDLE h = (HANDLE)_beginthreadex( 0, 0, start_routine, arg, 0, 0 );
+
+    if( h != 0 )
+    {
+        *thread = h;
+        return 0;
+    }
+    else
+    {
+        return EAGAIN;
+    }
+}
+
+inline void lw_thread_join( lw_thread_t thread )
+{
+    ::WaitForSingleObject( thread, INFINITE );
+    ::CloseHandle( thread );
+}
+
+} // namespace detail
+} // namespace boost
+
+#endif // defined( BOOST_HAS_PTHREADS )
+
+
+namespace boost
+{
+namespace detail
+{
+
+class lw_abstract_thread
+{
+public:
+
+    virtual ~lw_abstract_thread() {}
+    virtual void run() = 0;
+};
+
+#if defined( BOOST_HAS_PTHREADS )
+
+extern "C" void * lw_thread_routine( void * pv )
+{
+#if defined(BOOST_NO_CXX11_SMART_PTR)
+
+    std::auto_ptr<lw_abstract_thread> pt( static_cast<lw_abstract_thread *>( pv ) );
+
+#else
+
+    std::unique_ptr<lw_abstract_thread> pt( static_cast<lw_abstract_thread *>( pv ) );
+
+#endif
+
+    pt->run();
+
+    return 0;
+}
+
+#else
+
+unsigned __stdcall lw_thread_routine( void * pv )
+{
+#if defined(BOOST_NO_CXX11_SMART_PTR)
+
+    std::auto_ptr<lw_abstract_thread> pt( static_cast<lw_abstract_thread *>( pv ) );
+
+#else
+
+    std::unique_ptr<lw_abstract_thread> pt( static_cast<lw_abstract_thread *>( pv ) );
+
+#endif
+
+    pt->run();
+
+    return 0;
+}
+
+#endif
+
+template<class F> class lw_thread_impl: public lw_abstract_thread
+{
+public:
+
+    explicit lw_thread_impl( F f ): f_( f )
+    {
+    }
+
+    void run()
+    {
+        f_();
+    }
+
+private:
+
+    F f_;
+};
+
+template<class F> int lw_thread_create( lw_thread_t & th, F f )
+{
+#if defined(BOOST_NO_CXX11_SMART_PTR)
+
+    std::auto_ptr<lw_abstract_thread> p( new lw_thread_impl<F>( f ) );
+
+#else
+
+    std::unique_ptr<lw_abstract_thread> p( new lw_thread_impl<F>( f ) );
+
+#endif
+
+    int r = lw_thread_create_( &th, 0, lw_thread_routine, p.get() );
+
+    if( r == 0 )
+    {
+        p.release();
+    }
+
+    return r;
+}
+
+} // namespace detail
+} // namespace boost
+
+#endif // #ifndef BOOST_SMART_PTR_DETAIL_LIGHTWEIGHT_THREAD_HPP_INCLUDED

include/boost/smart_ptr/detail/local_counted_base.hpp

@@ -113,12 +113,12 @@ public:
 
 #endif
 
-    virtual void local_cb_destroy() BOOST_SP_NOEXCEPT
+    void local_cb_destroy() BOOST_SP_NOEXCEPT BOOST_OVERRIDE
     {
         delete this;
     }
 
-    virtual boost::detail::shared_count local_cb_get_shared_count() const BOOST_SP_NOEXCEPT
+    boost::detail::shared_count local_cb_get_shared_count() const BOOST_SP_NOEXCEPT BOOST_OVERRIDE
     {
         return pn_;
     }
@@ -130,12 +130,12 @@ public:
 
     shared_count pn_;
 
-    virtual void local_cb_destroy() BOOST_SP_NOEXCEPT
+    void local_cb_destroy() BOOST_SP_NOEXCEPT BOOST_OVERRIDE
     {
         shared_count().swap( pn_ );
     }
 
-    virtual boost::detail::shared_count local_cb_get_shared_count() const BOOST_SP_NOEXCEPT
+    boost::detail::shared_count local_cb_get_shared_count() const BOOST_SP_NOEXCEPT BOOST_OVERRIDE
     {
         return pn_;
     }

include/boost/smart_ptr/detail/shared_count.hpp

@@ -18,32 +18,29 @@
 // http://www.boost.org/LICENSE_1_0.txt)
 //
 
-#ifdef __BORLANDC__
+#if defined(__BORLANDC__) && !defined(__clang__)
 # pragma warn -8027     // Functions containing try are not expanded inline
 #endif
 
-#include <boost/config.hpp>
-#include <boost/checked_delete.hpp>
-#include <boost/throw_exception.hpp>
 #include <boost/smart_ptr/bad_weak_ptr.hpp>
 #include <boost/smart_ptr/detail/sp_counted_base.hpp>
 #include <boost/smart_ptr/detail/sp_counted_impl.hpp>
 #include <boost/smart_ptr/detail/sp_disable_deprecated.hpp>
 #include <boost/smart_ptr/detail/sp_noexcept.hpp>
+#include <boost/checked_delete.hpp>
+#include <boost/throw_exception.hpp>
+#include <boost/core/addressof.hpp>
+#include <boost/config.hpp>
 #include <boost/config/workaround.hpp>
-// In order to avoid circular dependencies with Boost.TR1
-// we make sure that our include of <memory> doesn't try to
-// pull in the TR1 headers: that's why we use this header 
-// rather than including <memory> directly:
-#include <boost/config/no_tr1/memory.hpp>  // std::auto_ptr
-#include <functional>       // std::less
+#include <boost/cstdint.hpp>
+#include <memory>            // std::auto_ptr
+#include <functional>        // std::less
+#include <cstddef>           // std::size_t
 
 #ifdef BOOST_NO_EXCEPTIONS
 # include <new>              // std::bad_alloc
 #endif
 
-#include <boost/core/addressof.hpp>
-
 #if defined( BOOST_SP_DISABLE_DEPRECATED )
 #pragma GCC diagnostic push
 #pragma GCC diagnostic ignored "-Wdeprecated-declarations"
@@ -103,6 +100,14 @@ template< class D > struct sp_convert_reference< D& >
     typedef sp_reference_wrapper< D > type;
 };
 
+template<class T> std::size_t sp_hash_pointer( T* p ) BOOST_NOEXCEPT
+{
+    boost::uintptr_t v = reinterpret_cast<boost::uintptr_t>( p );
+
+    // match boost::hash<T*>
+    return static_cast<std::size_t>( v + ( v >> 3 ) );
+}
+
 class weak_count;
 
 class shared_count
@@ -489,16 +494,20 @@ public:
         return pi_ == 0;
     }
 
-    friend inline bool operator==(shared_count const & a, shared_count const & b) BOOST_SP_NOEXCEPT
+    bool operator==( shared_count const & r ) const BOOST_SP_NOEXCEPT
     {
-        return a.pi_ == b.pi_;
+        return pi_ == r.pi_;
     }
 
-    friend inline bool operator<(shared_count const & a, shared_count const & b) BOOST_SP_NOEXCEPT
+    bool operator==( weak_count const & r ) const BOOST_SP_NOEXCEPT;
+
+    bool operator<( shared_count const & r ) const BOOST_SP_NOEXCEPT
     {
-        return std::less<sp_counted_base *>()( a.pi_, b.pi_ );
+        return std::less<sp_counted_base *>()( pi_, r.pi_ );
     }
 
+    bool operator<( weak_count const & r ) const BOOST_SP_NOEXCEPT;
+
     void * get_deleter( sp_typeinfo_ const & ti ) const BOOST_SP_NOEXCEPT
     {
         return pi_? pi_->get_deleter( ti ): 0;
@@ -513,6 +522,11 @@ public:
     {
         return pi_? pi_->get_untyped_deleter(): 0;
     }
+
+    std::size_t hash_value() const BOOST_SP_NOEXCEPT
+    {
+        return sp_hash_pointer( pi_ );
+    }
 };
 
 
@@ -620,14 +634,29 @@ public:
         return pi_ == 0;
     }
 
-    friend inline bool operator==(weak_count const & a, weak_count const & b) BOOST_SP_NOEXCEPT
+    bool operator==( weak_count const & r ) const BOOST_SP_NOEXCEPT
     {
-        return a.pi_ == b.pi_;
+        return pi_ == r.pi_;
     }
 
-    friend inline bool operator<(weak_count const & a, weak_count const & b) BOOST_SP_NOEXCEPT
+    bool operator==( shared_count const & r ) const BOOST_SP_NOEXCEPT
     {
-        return std::less<sp_counted_base *>()(a.pi_, b.pi_);
+        return pi_ == r.pi_;
+    }
+
+    bool operator<( weak_count const & r ) const BOOST_SP_NOEXCEPT
+    {
+        return std::less<sp_counted_base *>()( pi_, r.pi_ );
+    }
+
+    bool operator<( shared_count const & r ) const BOOST_SP_NOEXCEPT
+    {
+        return std::less<sp_counted_base *>()( pi_, r.pi_ );
+    }
+
+    std::size_t hash_value() const BOOST_SP_NOEXCEPT
+    {
+        return sp_hash_pointer( pi_ );
     }
 };
 
@@ -653,6 +682,16 @@ inline shared_count::shared_count( weak_count const & r, sp_nothrow_tag ) BOOST_
     }
 }
 
+inline bool shared_count::operator==( weak_count const & r ) const BOOST_SP_NOEXCEPT
+{
+    return pi_ == r.pi_;
+}
+
+inline bool shared_count::operator<( weak_count const & r ) const BOOST_SP_NOEXCEPT
+{
+    return std::less<sp_counted_base *>()( pi_, r.pi_ );
+}
+
 } // namespace detail
 
 } // namespace boost
@@ -661,7 +700,7 @@ inline shared_count::shared_count( weak_count const & r, sp_nothrow_tag ) BOOST_
 #pragma GCC diagnostic pop
 #endif
 
-#ifdef __BORLANDC__
+#if defined(__BORLANDC__) && !defined(__clang__)
 # pragma warn .8027     // Functions containing try are not expanded inline
 #endif
 

include/boost/smart_ptr/detail/sp_convertible.hpp

@@ -26,7 +26,7 @@
 # define BOOST_SP_NO_SP_CONVERTIBLE
 #endif
 
-#if !defined( BOOST_SP_NO_SP_CONVERTIBLE ) && defined( __BORLANDC__ ) && ( __BORLANDC__ < 0x630 )
+#if !defined( BOOST_SP_NO_SP_CONVERTIBLE ) && defined( BOOST_BORLANDC ) && ( BOOST_BORLANDC < 0x630 )
 # define BOOST_SP_NO_SP_CONVERTIBLE
 #endif
 

include/boost/smart_ptr/detail/sp_counted_base.hpp

@@ -17,14 +17,9 @@
 // http://www.boost.org/LICENSE_1_0.txt)
 //
 
+#include <boost/smart_ptr/detail/sp_has_gcc_intrinsics.hpp>
+#include <boost/smart_ptr/detail/sp_has_sync_intrinsics.hpp>
 #include <boost/config.hpp>
-#include <boost/smart_ptr/detail/sp_has_sync.hpp>
-
-#if !defined( __c2__ ) && defined( __clang__ ) && defined( __has_extension )
-# if __has_extension( __c_atomic__ )
-#   define BOOST_SP_HAS_CLANG_C11_ATOMICS
-# endif
-#endif
 
 #if defined( BOOST_SP_DISABLE_THREADS )
 # include <boost/smart_ptr/detail/sp_counted_base_nt.hpp>
@@ -41,18 +36,24 @@
 #elif defined( BOOST_DISABLE_THREADS ) && !defined( BOOST_SP_ENABLE_THREADS ) && !defined( BOOST_DISABLE_WIN32 )
 # include <boost/smart_ptr/detail/sp_counted_base_nt.hpp>
 
-#elif defined( BOOST_SP_HAS_CLANG_C11_ATOMICS )
-# include <boost/smart_ptr/detail/sp_counted_base_clang.hpp>
+#elif defined( BOOST_SP_HAS_GCC_INTRINSICS )
+# include <boost/smart_ptr/detail/sp_counted_base_gcc_atomic.hpp>
 
 #elif !defined( BOOST_NO_CXX11_HDR_ATOMIC )
 # include <boost/smart_ptr/detail/sp_counted_base_std_atomic.hpp>
 
-#elif defined( __SNC__ )
-# include <boost/smart_ptr/detail/sp_counted_base_snc_ps3.hpp>
+#elif defined( __GCC_HAVE_SYNC_COMPARE_AND_SWAP_4 )
+# include <boost/smart_ptr/detail/sp_counted_base_sync.hpp>
 
 #elif defined( __GNUC__ ) && ( defined( __i386__ ) || defined( __x86_64__ ) ) && !defined(__PATHSCALE__)
 # include <boost/smart_ptr/detail/sp_counted_base_gcc_x86.hpp>
 
+#elif defined( BOOST_SP_HAS_SYNC_INTRINSICS )
+# include <boost/smart_ptr/detail/sp_counted_base_sync.hpp>
+
+#elif defined( __SNC__ )
+# include <boost/smart_ptr/detail/sp_counted_base_snc_ps3.hpp>
+
 #elif defined(__HP_aCC) && defined(__ia64)
 # include <boost/smart_ptr/detail/sp_counted_base_acc_ia64.hpp>
 
@@ -71,9 +72,6 @@
 #elif defined( __GNUC__ ) && ( defined( __mips__ ) || defined( _mips ) ) && !defined(__PATHSCALE__) && !defined( __mips16 )
 # include <boost/smart_ptr/detail/sp_counted_base_gcc_mips.hpp>
 
-#elif defined( BOOST_SP_HAS_SYNC )
-# include <boost/smart_ptr/detail/sp_counted_base_sync.hpp>
-
 #elif defined(__GNUC__) && ( defined( __sparcv9 ) || ( defined( __sparcv8 ) && ( __GNUC__ * 100 + __GNUC_MINOR__ >= 402 ) ) )
 # include <boost/smart_ptr/detail/sp_counted_base_gcc_sparc.hpp>
 
@@ -91,6 +89,4 @@
 
 #endif
 
-#undef BOOST_SP_HAS_CLANG_C11_ATOMICS
-
 #endif  // #ifndef BOOST_SMART_PTR_DETAIL_SP_COUNTED_BASE_HPP_INCLUDED

include/boost/smart_ptr/detail/sp_counted_base_acc_ia64.hpp

@@ -16,9 +16,19 @@
 //
 
 #include <boost/smart_ptr/detail/sp_typeinfo_.hpp>
+#include <boost/smart_ptr/detail/sp_obsolete.hpp>
 #include <boost/config.hpp>
 #include <machine/sys/inline.h>
 
+#if defined(BOOST_SP_REPORT_IMPLEMENTATION)
+
+#include <boost/config/pragma_message.hpp>
+BOOST_PRAGMA_MESSAGE("Using HP aCC++/HP-UX/IA64 sp_counted_base")
+
+#endif
+
+BOOST_SP_OBSOLETE()
+
 namespace boost
 {
 

include/boost/smart_ptr/detail/sp_counted_base_aix.hpp

@@ -25,6 +25,13 @@
 #include <builtins.h>
 #include <sys/atomic_op.h>
 
+#if defined(BOOST_SP_REPORT_IMPLEMENTATION)
+
+#include <boost/config/pragma_message.hpp>
+BOOST_PRAGMA_MESSAGE("Using AIX sp_counted_base")
+
+#endif
+
 namespace boost
 {
 

include/boost/smart_ptr/detail/sp_counted_base_clang.hpp

@@ -1,152 +0,0 @@
-#ifndef BOOST_SMART_PTR_DETAIL_SP_COUNTED_BASE_CLANG_HPP_INCLUDED
-#define BOOST_SMART_PTR_DETAIL_SP_COUNTED_BASE_CLANG_HPP_INCLUDED
-
-// MS compatible compilers support #pragma once
-
-#if defined(_MSC_VER) && (_MSC_VER >= 1020)
-# pragma once
-#endif
-
-//  detail/sp_counted_base_clang.hpp - __c11 clang intrinsics
-//
-//  Copyright (c) 2007, 2013, 2015 Peter Dimov
-//
-//  Distributed under the Boost Software License, Version 1.0.
-//  See accompanying file LICENSE_1_0.txt or copy at
-//  http://www.boost.org/LICENSE_1_0.txt
-
-#include <boost/smart_ptr/detail/sp_typeinfo_.hpp>
-#include <boost/smart_ptr/detail/sp_noexcept.hpp>
-#include <boost/config.hpp>
-#include <boost/cstdint.hpp>
-
-namespace boost
-{
-
-namespace detail
-{
-
-typedef _Atomic( boost::int_least32_t ) atomic_int_least32_t;
-
-inline void atomic_increment( atomic_int_least32_t * pw ) BOOST_SP_NOEXCEPT
-{
-    __c11_atomic_fetch_add( pw, 1, __ATOMIC_RELAXED );
-}
-
-inline boost::int_least32_t atomic_decrement( atomic_int_least32_t * pw ) BOOST_SP_NOEXCEPT
-{
-    return __c11_atomic_fetch_sub( pw, 1, __ATOMIC_ACQ_REL );
-}
-
-inline boost::int_least32_t atomic_conditional_increment( atomic_int_least32_t * pw ) BOOST_SP_NOEXCEPT
-{
-    // long r = *pw;
-    // if( r != 0 ) ++*pw;
-    // return r;
-
-    boost::int_least32_t r = __c11_atomic_load( pw, __ATOMIC_RELAXED );
-
-    for( ;; )
-    {
-        if( r == 0 )
-        {
-            return r;
-        }
-
-        if( __c11_atomic_compare_exchange_weak( pw, &r, r + 1, __ATOMIC_RELAXED, __ATOMIC_RELAXED ) )
-        {
-            return r;
-        }
-    }    
-}
-
-#if defined(__clang__)
-# pragma clang diagnostic push
-# pragma clang diagnostic ignored "-Wweak-vtables"
-#endif
-
-class BOOST_SYMBOL_VISIBLE sp_counted_base
-{
-private:
-
-    sp_counted_base( sp_counted_base const & );
-    sp_counted_base & operator= ( sp_counted_base const & );
-
-    atomic_int_least32_t use_count_;    // #shared
-    atomic_int_least32_t weak_count_;   // #weak + (#shared != 0)
-
-public:
-
-    sp_counted_base() BOOST_SP_NOEXCEPT
-    {
-        __c11_atomic_init( &use_count_, 1 );
-        __c11_atomic_init( &weak_count_, 1 );
-    }
-
-    virtual ~sp_counted_base() /*BOOST_SP_NOEXCEPT*/
-    {
-    }
-
-    // dispose() is called when use_count_ drops to zero, to release
-    // the resources managed by *this.
-
-    virtual void dispose() BOOST_SP_NOEXCEPT = 0; // nothrow
-
-    // destroy() is called when weak_count_ drops to zero.
-
-    virtual void destroy() BOOST_SP_NOEXCEPT // nothrow
-    {
-        delete this;
-    }
-
-    virtual void * get_deleter( sp_typeinfo_ const & ti ) BOOST_SP_NOEXCEPT = 0;
-    virtual void * get_local_deleter( sp_typeinfo_ const & ti ) BOOST_SP_NOEXCEPT = 0;
-    virtual void * get_untyped_deleter() BOOST_SP_NOEXCEPT = 0;
-
-    void add_ref_copy() BOOST_SP_NOEXCEPT
-    {
-        atomic_increment( &use_count_ );
-    }
-
-    bool add_ref_lock() BOOST_SP_NOEXCEPT // true on success
-    {
-        return atomic_conditional_increment( &use_count_ ) != 0;
-    }
-
-    void release() BOOST_SP_NOEXCEPT
-    {
-        if( atomic_decrement( &use_count_ ) == 1 )
-        {
-            dispose();
-            weak_release();
-        }
-    }
-
-    void weak_add_ref() BOOST_SP_NOEXCEPT
-    {
-        atomic_increment( &weak_count_ );
-    }
-
-    void weak_release() BOOST_SP_NOEXCEPT
-    {
-        if( atomic_decrement( &weak_count_ ) == 1 )
-        {
-            destroy();
-        }
-    }
-
-    long use_count() const BOOST_SP_NOEXCEPT
-    {
-        return __c11_atomic_load( const_cast< atomic_int_least32_t* >( &use_count_ ), __ATOMIC_ACQUIRE );
-    }
-};
-
-#if defined(__clang__)
-# pragma clang diagnostic pop
-#endif
-
-} // namespace detail
-
-} // namespace boost
-
-#endif  // #ifndef BOOST_SMART_PTR_DETAIL_SP_COUNTED_BASE_CLANG_HPP_INCLUDED

include/boost/smart_ptr/detail/sp_counted_base_cw_ppc.hpp

@@ -25,8 +25,18 @@
 //
 
 #include <boost/smart_ptr/detail/sp_typeinfo_.hpp>
+#include <boost/smart_ptr/detail/sp_obsolete.hpp>
 #include <boost/config.hpp>
 
+#if defined(BOOST_SP_REPORT_IMPLEMENTATION)
+
+#include <boost/config/pragma_message.hpp>
+BOOST_PRAGMA_MESSAGE("Using CodeWarrior/PowerPC sp_counted_base")
+
+#endif
+
+BOOST_SP_OBSOLETE()
+
 namespace boost
 {
 

include/boost/smart_ptr/detail/sp_counted_base_cw_x86.hpp

@@ -1,161 +0,0 @@
-#ifndef BOOST_SMART_PTR_DETAIL_SP_COUNTED_BASE_CW_X86_HPP_INCLUDED
-#define BOOST_SMART_PTR_DETAIL_SP_COUNTED_BASE_CW_X86_HPP_INCLUDED
-
-// MS compatible compilers support #pragma once
-
-#if defined(_MSC_VER) && (_MSC_VER >= 1020)
-# pragma once
-#endif
-
-//
-//  detail/sp_counted_base_cw_x86.hpp - CodeWarrion on 486+
-//
-//  Copyright (c) 2001, 2002, 2003 Peter Dimov and Multi Media Ltd.
-//  Copyright 2004-2005 Peter Dimov
-//  Copyright 2005 Rene Rivera
-//
-//  Distributed under the Boost Software License, Version 1.0. (See
-//  accompanying file LICENSE_1_0.txt or copy at
-//  http://www.boost.org/LICENSE_1_0.txt)
-//
-//
-//  Lock-free algorithm by Alexander Terekhov
-//
-//  Thanks to Ben Hitchings for the #weak + (#shared != 0)
-//  formulation
-//
-
-#include <boost/smart_ptr/detail/sp_typeinfo_.hpp>
-#include <boost/config.hpp>
-
-namespace boost
-{
-
-namespace detail
-{
-
-inline int atomic_exchange_and_add( int * pw, int dv )
-{
-    // int r = *pw;
-    // *pw += dv;
-    // return r;
-
-    asm
-    {
-        mov esi, [pw]
-        mov eax, dv
-        lock xadd dword ptr [esi], eax
-    }
-}
-
-inline void atomic_increment( int * pw )
-{
-    //atomic_exchange_and_add( pw, 1 );
-
-    asm
-    {
-        mov esi, [pw]
-        lock inc dword ptr [esi]
-    }
-}
-
-inline int atomic_conditional_increment( int * pw )
-{
-    // int rv = *pw;
-    // if( rv != 0 ) ++*pw;
-    // return rv;
-
-    asm
-    {
-        mov esi, [pw]
-        mov eax, dword ptr [esi]
-    L0:
-        test eax, eax
-        je L1
-        mov ebx, eax
-        inc ebx
-        lock cmpxchg dword ptr [esi], ebx
-        jne L0
-    L1:
-    }
-}
-
-class BOOST_SYMBOL_VISIBLE sp_counted_base
-{
-private:
-
-    sp_counted_base( sp_counted_base const & );
-    sp_counted_base & operator= ( sp_counted_base const & );
-
-    int use_count_;        // #shared
-    int weak_count_;       // #weak + (#shared != 0)
-
-public:
-
-    sp_counted_base(): use_count_( 1 ), weak_count_( 1 )
-    {
-    }
-
-    virtual ~sp_counted_base() // nothrow
-    {
-    }
-
-    // dispose() is called when use_count_ drops to zero, to release
-    // the resources managed by *this.
-
-    virtual void dispose() = 0; // nothrow
-
-    // destroy() is called when weak_count_ drops to zero.
-
-    virtual void destroy() // nothrow
-    {
-        delete this;
-    }
-
-    virtual void * get_deleter( sp_typeinfo_ const & ti ) = 0;
-    virtual void * get_local_deleter( sp_typeinfo_ const & ti ) = 0;
-    virtual void * get_untyped_deleter() = 0;
-
-    void add_ref_copy()
-    {
-        atomic_increment( &use_count_ );
-    }
-
-    bool add_ref_lock() // true on success
-    {
-        return atomic_conditional_increment( &use_count_ ) != 0;
-    }
-
-    void release() // nothrow
-    {
-        if( atomic_exchange_and_add( &use_count_, -1 ) == 1 )
-        {
-            dispose();
-            weak_release();
-        }
-    }
-
-    void weak_add_ref() // nothrow
-    {
-        atomic_increment( &weak_count_ );
-    }
-
-    void weak_release() // nothrow
-    {
-        if( atomic_exchange_and_add( &weak_count_, -1 ) == 1 )
-        {
-            destroy();
-        }
-    }
-
-    long use_count() const // nothrow
-    {
-        return static_cast<int const volatile &>( use_count_ );
-    }
-};
-
-} // namespace detail
-
-} // namespace boost
-
-#endif  // #ifndef BOOST_SMART_PTR_DETAIL_SP_COUNTED_BASE_CW_X86_HPP_INCLUDED

include/boost/smart_ptr/detail/sp_counted_base_gcc_atomic.hpp

@@ -0,0 +1,148 @@
+#ifndef BOOST_SMART_PTR_DETAIL_SP_COUNTED_BASE_GCC_ATOMIC_HPP_INCLUDED
+#define BOOST_SMART_PTR_DETAIL_SP_COUNTED_BASE_GCC_ATOMIC_HPP_INCLUDED
+
+// MS compatible compilers support #pragma once
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
+#endif
+
+// detail/sp_counted_base_gcc_atomic.hpp - g++ 4.7+ __atomic intrinsics
+//
+// Copyright 2007, 2020 Peter Dimov
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+
+#include <boost/smart_ptr/detail/sp_typeinfo_.hpp>
+#include <boost/config.hpp>
+#include <boost/cstdint.hpp>
+
+#if defined(BOOST_SP_REPORT_IMPLEMENTATION)
+
+#include <boost/config/pragma_message.hpp>
+BOOST_PRAGMA_MESSAGE("Using __atomic sp_counted_base")
+
+#endif
+
+namespace boost
+{
+
+namespace detail
+{
+
+inline void atomic_increment( boost::uint_least32_t * pw )
+{
+    __atomic_fetch_add( pw, 1, __ATOMIC_RELAXED );
+}
+
+inline boost::uint_least32_t atomic_decrement( boost::uint_least32_t * pw )
+{
+    return __atomic_fetch_sub( pw, 1, __ATOMIC_ACQ_REL );
+}
+
+inline boost::uint_least32_t atomic_conditional_increment( boost::uint_least32_t * pw )
+{
+    // long r = *pw;
+    // if( r != 0 ) ++*pw;
+    // return r;
+
+    boost::uint_least32_t r = __atomic_load_n( pw, __ATOMIC_RELAXED );
+
+    for( ;; )
+    {
+        if( r == 0 )
+        {
+            return r;
+        }
+
+        if( __atomic_compare_exchange_n( pw, &r, r + 1, true, __ATOMIC_RELAXED, __ATOMIC_RELAXED ) )
+        {
+            return r;
+        }
+    }
+}
+
+inline boost::uint_least32_t atomic_load( boost::uint_least32_t const * pw )
+{
+    return __atomic_load_n( pw, __ATOMIC_ACQUIRE );
+}
+
+class BOOST_SYMBOL_VISIBLE sp_counted_base
+{
+private:
+
+    sp_counted_base( sp_counted_base const & );
+    sp_counted_base & operator= ( sp_counted_base const & );
+
+    boost::uint_least32_t use_count_;        // #shared
+    boost::uint_least32_t weak_count_;       // #weak + (#shared != 0)
+
+public:
+
+    sp_counted_base(): use_count_( 1 ), weak_count_( 1 )
+    {
+    }
+
+    virtual ~sp_counted_base() // nothrow
+    {
+    }
+
+    // dispose() is called when use_count_ drops to zero, to release
+    // the resources managed by *this.
+
+    virtual void dispose() = 0; // nothrow
+
+    // destroy() is called when weak_count_ drops to zero.
+
+    virtual void destroy() // nothrow
+    {
+        delete this;
+    }
+
+    virtual void * get_deleter( sp_typeinfo_ const & ti ) = 0;
+    virtual void * get_local_deleter( sp_typeinfo_ const & ti ) = 0;
+    virtual void * get_untyped_deleter() = 0;
+
+    void add_ref_copy()
+    {
+        atomic_increment( &use_count_ );
+    }
+
+    bool add_ref_lock() // true on success
+    {
+        return atomic_conditional_increment( &use_count_ ) != 0;
+    }
+
+    void release() // nothrow
+    {
+        if( atomic_decrement( &use_count_ ) == 1 )
+        {
+            dispose();
+            weak_release();
+        }
+    }
+
+    void weak_add_ref() // nothrow
+    {
+        atomic_increment( &weak_count_ );
+    }
+
+    void weak_release() // nothrow
+    {
+        if( atomic_decrement( &weak_count_ ) == 1 )
+        {
+            destroy();
+        }
+    }
+
+    long use_count() const // nothrow
+    {
+        return atomic_load( &use_count_ );
+    }
+};
+
+} // namespace detail
+
+} // namespace boost
+
+#endif  // #ifndef BOOST_SMART_PTR_DETAIL_SP_COUNTED_BASE_SYNC_HPP_INCLUDED

include/boost/smart_ptr/detail/sp_counted_base_gcc_ia64.hpp

@@ -17,8 +17,18 @@
 //
 
 #include <boost/smart_ptr/detail/sp_typeinfo_.hpp>
+#include <boost/smart_ptr/detail/sp_obsolete.hpp>
 #include <boost/config.hpp>
 
+#if defined(BOOST_SP_REPORT_IMPLEMENTATION)
+
+#include <boost/config/pragma_message.hpp>
+BOOST_PRAGMA_MESSAGE("Using g++/IA64 sp_counted_base")
+
+#endif
+
+BOOST_SP_OBSOLETE()
+
 namespace boost
 {
 

include/boost/smart_ptr/detail/sp_counted_base_gcc_mips.hpp

@@ -21,8 +21,18 @@
 //
 
 #include <boost/smart_ptr/detail/sp_typeinfo_.hpp>
+#include <boost/smart_ptr/detail/sp_obsolete.hpp>
 #include <boost/config.hpp>
 
+#if defined(BOOST_SP_REPORT_IMPLEMENTATION)
+
+#include <boost/config/pragma_message.hpp>
+BOOST_PRAGMA_MESSAGE("Using g++/MIPS sp_counted_base")
+
+#endif
+
+BOOST_SP_OBSOLETE()
+
 namespace boost
 {
 

include/boost/smart_ptr/detail/sp_counted_base_gcc_ppc.hpp

@@ -25,8 +25,18 @@
 //
 
 #include <boost/smart_ptr/detail/sp_typeinfo_.hpp>
+#include <boost/smart_ptr/detail/sp_obsolete.hpp>
 #include <boost/config.hpp>
 
+#if defined(BOOST_SP_REPORT_IMPLEMENTATION)
+
+#include <boost/config/pragma_message.hpp>
+BOOST_PRAGMA_MESSAGE("Using g++/PowerPC sp_counted_base")
+
+#endif
+
+BOOST_SP_OBSOLETE()
+
 namespace boost
 {
 

include/boost/smart_ptr/detail/sp_counted_base_gcc_sparc.hpp

@@ -20,9 +20,19 @@
 //  Thanks to Michael van der Westhuizen
 
 #include <boost/smart_ptr/detail/sp_typeinfo_.hpp>
+#include <boost/smart_ptr/detail/sp_obsolete.hpp>
 #include <boost/config.hpp>
 #include <inttypes.h> // int32_t
 
+#if defined(BOOST_SP_REPORT_IMPLEMENTATION)
+
+#include <boost/config/pragma_message.hpp>
+BOOST_PRAGMA_MESSAGE("Using g++/Sparc sp_counted_base")
+
+#endif
+
+BOOST_SP_OBSOLETE()
+
 namespace boost
 {
 

include/boost/smart_ptr/detail/sp_counted_base_gcc_x86.hpp

@@ -25,8 +25,18 @@
 //
 
 #include <boost/smart_ptr/detail/sp_typeinfo_.hpp>
+#include <boost/smart_ptr/detail/sp_obsolete.hpp>
 #include <boost/config.hpp>
 
+#if defined(BOOST_SP_REPORT_IMPLEMENTATION)
+
+#include <boost/config/pragma_message.hpp>
+BOOST_PRAGMA_MESSAGE("Using g++/x86 sp_counted_base")
+
+#endif
+
+BOOST_SP_OBSOLETE()
+
 namespace boost
 {
 

include/boost/smart_ptr/detail/sp_counted_base_nt.hpp

@@ -23,6 +23,13 @@
 #include <boost/config.hpp>
 #include <boost/cstdint.hpp>
 
+#if defined(BOOST_SP_REPORT_IMPLEMENTATION)
+
+#include <boost/config/pragma_message.hpp>
+BOOST_PRAGMA_MESSAGE("Using single-threaded, non-atomic sp_counted_base")
+
+#endif
+
 namespace boost
 {
 

include/boost/smart_ptr/detail/sp_counted_base_pt.hpp

@@ -24,6 +24,13 @@
 #include <boost/cstdint.hpp>
 #include <pthread.h>
 
+#if defined(BOOST_SP_REPORT_IMPLEMENTATION)
+
+#include <boost/config/pragma_message.hpp>
+BOOST_PRAGMA_MESSAGE("Using pthread_mutex sp_counted_base")
+
+#endif
+
 namespace boost
 {
 

include/boost/smart_ptr/detail/sp_counted_base_snc_ps3.hpp

@@ -6,7 +6,7 @@
 # pragma once
 #endif
 
-//  detail/sp_counted_base_gcc_sparc.hpp - g++ on Sparc V8+
+//  detail/sp_counted_base_gcc_snc_ps3.hpp - PS3 Cell
 //
 //  Copyright (c) 2006 Piotr Wyderski
 //  Copyright (c) 2006 Tomas Puverle
@@ -20,9 +20,19 @@
 //  Thanks to Michael van der Westhuizen
 
 #include <boost/smart_ptr/detail/sp_typeinfo_.hpp>
+#include <boost/smart_ptr/detail/sp_obsolete.hpp>
 #include <boost/config.hpp>
 #include <inttypes.h> // uint32_t
 
+#if defined(BOOST_SP_REPORT_IMPLEMENTATION)
+
+#include <boost/config/pragma_message.hpp>
+BOOST_PRAGMA_MESSAGE("Using PS3 sp_counted_base")
+
+#endif
+
+BOOST_SP_OBSOLETE()
+
 namespace boost
 {
 

include/boost/smart_ptr/detail/sp_counted_base_solaris.hpp

@@ -1,116 +0,0 @@
-#ifndef BOOST_SMART_PTR_DETAIL_SP_COUNTED_BASE_SOLARIS_HPP_INCLUDED
-#define BOOST_SMART_PTR_DETAIL_SP_COUNTED_BASE_SOLARIS_HPP_INCLUDED
-
-//
-//  detail/sp_counted_base_solaris.hpp
-//   based on: detail/sp_counted_base_w32.hpp
-//
-//  Copyright (c) 2001, 2002, 2003 Peter Dimov and Multi Media Ltd.
-//  Copyright 2004-2005 Peter Dimov
-//  Copyright 2006 Michael van der Westhuizen
-//
-//  Distributed under the Boost Software License, Version 1.0. (See
-//  accompanying file LICENSE_1_0.txt or copy at
-//  http://www.boost.org/LICENSE_1_0.txt)
-//
-//
-//  Lock-free algorithm by Alexander Terekhov
-//
-//  Thanks to Ben Hitchings for the #weak + (#shared != 0)
-//  formulation
-//
-
-#include <boost/smart_ptr/detail/sp_typeinfo_.hpp>
-#include <boost/config.hpp>
-#include <atomic.h>
-
-namespace boost
-{
-
-namespace detail
-{
-
-class BOOST_SYMBOL_VISIBLE sp_counted_base
-{
-private:
-
-    sp_counted_base( sp_counted_base const & );
-    sp_counted_base & operator= ( sp_counted_base const & );
-
-    uint32_t use_count_;        // #shared
-    uint32_t weak_count_;       // #weak + (#shared != 0)
-
-public:
-
-    sp_counted_base(): use_count_( 1 ), weak_count_( 1 )
-    {
-    }
-
-    virtual ~sp_counted_base() // nothrow
-    {
-    }
-
-    // dispose() is called when use_count_ drops to zero, to release
-    // the resources managed by *this.
-
-    virtual void dispose() = 0; // nothrow
-
-    // destroy() is called when weak_count_ drops to zero.
-
-    virtual void destroy() // nothrow
-    {
-        delete this;
-    }
-
-    virtual void * get_deleter( sp_typeinfo_ const & ti ) = 0;
-    virtual void * get_local_deleter( sp_typeinfo_ const & ti ) = 0;
-    virtual void * get_untyped_deleter() = 0;
-
-    void add_ref_copy()
-    {
-        atomic_inc_32( &use_count_ );
-    }
-
-    bool add_ref_lock() // true on success
-    {
-        for( ;; )
-        {
-            uint32_t tmp = static_cast< uint32_t const volatile& >( use_count_ );
-            if( tmp == 0 ) return false;
-            if( atomic_cas_32( &use_count_, tmp, tmp + 1 ) == tmp ) return true;
-        }
-    }
-
-    void release() // nothrow
-    {
-        if( atomic_dec_32_nv( &use_count_ ) == 0 )
-        {
-            dispose();
-            weak_release();
-        }
-    }
-
-    void weak_add_ref() // nothrow
-    {
-        atomic_inc_32( &weak_count_ );
-    }
-
-    void weak_release() // nothrow
-    {
-        if( atomic_dec_32_nv( &weak_count_ ) == 0 )
-        {
-            destroy();
-        }
-    }
-
-    long use_count() const // nothrow
-    {
-        return static_cast<long const volatile &>( use_count_ );
-    }
-};
-
-} // namespace detail
-
-} // namespace boost
-
-#endif  // #ifndef BOOST_SMART_PTR_DETAIL_SP_COUNTED_BASE_SOLARIS_HPP_INCLUDED

include/boost/smart_ptr/detail/sp_counted_base_spin.hpp

@@ -22,6 +22,13 @@
 #include <boost/smart_ptr/detail/spinlock_pool.hpp>
 #include <boost/config.hpp>
 
+#if defined(BOOST_SP_REPORT_IMPLEMENTATION)
+
+#include <boost/config/pragma_message.hpp>
+BOOST_PRAGMA_MESSAGE("Using spinlock-based sp_counted_base")
+
+#endif
+
 namespace boost
 {
 

include/boost/smart_ptr/detail/sp_counted_base_std_atomic.hpp

@@ -21,6 +21,13 @@
 #include <atomic>
 #include <cstdint>
 
+#if defined(BOOST_SP_REPORT_IMPLEMENTATION)
+
+#include <boost/config/pragma_message.hpp>
+BOOST_PRAGMA_MESSAGE("Using std::atomic sp_counted_base")
+
+#endif
+
 namespace boost
 {
 

include/boost/smart_ptr/detail/sp_counted_base_sync.hpp

@@ -23,6 +23,13 @@
 # include <ia64intrin.h>
 #endif
 
+#if defined(BOOST_SP_REPORT_IMPLEMENTATION)
+
+#include <boost/config/pragma_message.hpp>
+BOOST_PRAGMA_MESSAGE("Using __sync sp_counted_base")
+
+#endif
+
 namespace boost
 {
 

include/boost/smart_ptr/detail/sp_counted_base_vacpp_ppc.hpp

@@ -22,8 +22,18 @@
 //
 
 #include <boost/smart_ptr/detail/sp_typeinfo_.hpp>
+#include <boost/smart_ptr/detail/sp_obsolete.hpp>
 #include <boost/config.hpp>
 
+#if defined(BOOST_SP_REPORT_IMPLEMENTATION)
+
+#include <boost/config/pragma_message.hpp>
+BOOST_PRAGMA_MESSAGE("Using xlC/PowerPC sp_counted_base")
+
+#endif
+
+BOOST_SP_OBSOLETE()
+
 extern "builtin" void __lwsync(void);
 extern "builtin" void __isync(void);
 extern "builtin" int __fetch_and_add(volatile int* addr, int val);

include/boost/smart_ptr/detail/sp_counted_base_w32.hpp

@@ -29,6 +29,13 @@
 #include <boost/config/workaround.hpp>
 #include <boost/config.hpp>
 
+#if defined(BOOST_SP_REPORT_IMPLEMENTATION)
+
+#include <boost/config/pragma_message.hpp>
+BOOST_PRAGMA_MESSAGE("Using Win32 sp_counted_base")
+
+#endif
+
 namespace boost
 {
 

include/boost/smart_ptr/detail/sp_counted_impl.hpp

@@ -18,25 +18,21 @@
 // http://www.boost.org/LICENSE_1_0.txt)
 //
 
-#include <boost/config.hpp>
-
 #if defined(BOOST_SP_USE_STD_ALLOCATOR) && defined(BOOST_SP_USE_QUICK_ALLOCATOR)
 # error BOOST_SP_USE_STD_ALLOCATOR and BOOST_SP_USE_QUICK_ALLOCATOR are incompatible.
 #endif
 
-#include <boost/checked_delete.hpp>
 #include <boost/smart_ptr/detail/sp_counted_base.hpp>
 #include <boost/smart_ptr/detail/sp_noexcept.hpp>
+#include <boost/checked_delete.hpp>
 #include <boost/core/addressof.hpp>
+#include <boost/config.hpp>
 
 #if defined(BOOST_SP_USE_QUICK_ALLOCATOR)
 #include <boost/smart_ptr/detail/quick_allocator.hpp>
 #endif
 
-#if defined(BOOST_SP_USE_STD_ALLOCATOR)
-#include <memory>           // std::allocator
-#endif
-
+#include <memory>           // std::allocator, std::allocator_traits
 #include <cstddef>          // std::size_t
 
 namespace boost
@@ -85,7 +81,7 @@ public:
 #endif
     }
 
-    virtual void dispose() BOOST_SP_NOEXCEPT
+    void dispose() BOOST_SP_NOEXCEPT BOOST_OVERRIDE
     {
 #if defined(BOOST_SP_ENABLE_DEBUG_HOOKS)
         boost::sp_scalar_destructor_hook( px_, sizeof(X), this );
@@ -93,17 +89,17 @@ public:
         boost::checked_delete( px_ );
     }
 
-    virtual void * get_deleter( sp_typeinfo_ const & ) BOOST_SP_NOEXCEPT
+    void * get_deleter( sp_typeinfo_ const & ) BOOST_SP_NOEXCEPT BOOST_OVERRIDE
     {
         return 0;
     }
 
-    virtual void * get_local_deleter( sp_typeinfo_ const & ) BOOST_SP_NOEXCEPT
+    void * get_local_deleter( sp_typeinfo_ const & ) BOOST_SP_NOEXCEPT BOOST_OVERRIDE
     {
         return 0;
     }
 
-    virtual void * get_untyped_deleter() BOOST_SP_NOEXCEPT
+    void * get_untyped_deleter() BOOST_SP_NOEXCEPT BOOST_OVERRIDE
     {
         return 0;
     }
@@ -168,22 +164,22 @@ public:
     {
     }
 
-    virtual void dispose() BOOST_SP_NOEXCEPT
+    void dispose() BOOST_SP_NOEXCEPT BOOST_OVERRIDE
     {
         del( ptr );
     }
 
-    virtual void * get_deleter( sp_typeinfo_ const & ti ) BOOST_SP_NOEXCEPT
+    void * get_deleter( sp_typeinfo_ const & ti ) BOOST_SP_NOEXCEPT BOOST_OVERRIDE
     {
         return ti == BOOST_SP_TYPEID_(D)? &reinterpret_cast<char&>( del ): 0;
     }
 
-    virtual void * get_local_deleter( sp_typeinfo_ const & ti ) BOOST_SP_NOEXCEPT
+    void * get_local_deleter( sp_typeinfo_ const & ti ) BOOST_SP_NOEXCEPT BOOST_OVERRIDE
     {
         return ti == BOOST_SP_TYPEID_(D)? boost::detail::get_local_deleter( boost::addressof( del ) ): 0;
     }
 
-    virtual void * get_untyped_deleter() BOOST_SP_NOEXCEPT
+    void * get_untyped_deleter() BOOST_SP_NOEXCEPT BOOST_OVERRIDE
     {
         return &reinterpret_cast<char&>( del );
     }
@@ -242,12 +238,12 @@ public:
     {
     }
 
-    virtual void dispose() BOOST_SP_NOEXCEPT
+    void dispose() BOOST_SP_NOEXCEPT BOOST_OVERRIDE
     {
         d_( p_ );
     }
 
-    virtual void destroy() BOOST_SP_NOEXCEPT
+    void destroy() BOOST_SP_NOEXCEPT BOOST_OVERRIDE
     {
 #if !defined( BOOST_NO_CXX11_ALLOCATOR )
 
@@ -266,17 +262,17 @@ public:
         a2.deallocate( this, 1 );
     }
 
-    virtual void * get_deleter( sp_typeinfo_ const & ti ) BOOST_SP_NOEXCEPT
+    void * get_deleter( sp_typeinfo_ const & ti ) BOOST_SP_NOEXCEPT BOOST_OVERRIDE
     {
         return ti == BOOST_SP_TYPEID_( D )? &reinterpret_cast<char&>( d_ ): 0;
     }
 
-    virtual void * get_local_deleter( sp_typeinfo_ const & ti ) BOOST_SP_NOEXCEPT
+    void * get_local_deleter( sp_typeinfo_ const & ti ) BOOST_SP_NOEXCEPT BOOST_OVERRIDE
     {
         return ti == BOOST_SP_TYPEID_( D )? boost::detail::get_local_deleter( boost::addressof( d_ ) ): 0;
     }
 
-    virtual void * get_untyped_deleter() BOOST_SP_NOEXCEPT
+    void * get_untyped_deleter() BOOST_SP_NOEXCEPT BOOST_OVERRIDE
     {
         return &reinterpret_cast<char&>( d_ );
     }

include/boost/smart_ptr/detail/sp_has_gcc_intrinsics.hpp

@@ -0,0 +1,27 @@
+#ifndef BOOST_SMART_PTR_DETAIL_SP_HAS_GCC_INTRINSICS_HPP_INCLUDED
+#define BOOST_SMART_PTR_DETAIL_SP_HAS_GCC_INTRINSICS_HPP_INCLUDED
+
+// MS compatible compilers support #pragma once
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
+#endif
+
+
+// boost/smart_ptr/detail/sp_has_gcc_intrinsics.hpp
+//
+// Copyright 2020 Peter Dimov
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+//
+// Defines the BOOST_SP_HAS_GCC_INTRINSICS macro if the __atomic_*
+// intrinsics are available.
+
+
+#if defined( __ATOMIC_RELAXED ) && defined( __ATOMIC_ACQUIRE ) && defined( __ATOMIC_RELEASE ) && defined( __ATOMIC_ACQ_REL )
+
+# define BOOST_SP_HAS_GCC_INTRINSICS
+
+#endif
+
+#endif // #ifndef BOOST_SMART_PTR_DETAIL_SP_HAS_GCC_INTRINSICS_HPP_INCLUDED

include/boost/smart_ptr/detail/sp_has_sync.hpp

@@ -1,69 +0,0 @@
-#ifndef BOOST_SMART_PTR_DETAIL_SP_HAS_SYNC_HPP_INCLUDED
-#define BOOST_SMART_PTR_DETAIL_SP_HAS_SYNC_HPP_INCLUDED
-
-// MS compatible compilers support #pragma once
-
-#if defined(_MSC_VER) && (_MSC_VER >= 1020)
-# pragma once
-#endif
-
-//
-//  boost/smart_ptr/detail/sp_has_sync.hpp
-//
-//  Copyright (c) 2008, 2009 Peter Dimov
-//
-//  Distributed under the Boost Software License, Version 1.0.
-//  See accompanying file LICENSE_1_0.txt or copy at
-//  http://www.boost.org/LICENSE_1_0.txt)
-//
-//  Defines the BOOST_SP_HAS_SYNC macro if the __sync_* intrinsics
-//  are available.
-//
-
-#ifndef BOOST_SP_NO_SYNC
-
-#if !defined( __c2__ ) && defined( __GCC_HAVE_SYNC_COMPARE_AND_SWAP_4 )
-
-# define BOOST_SP_HAS_SYNC
-
-#elif defined( __IBMCPP__ ) && ( __IBMCPP__ >= 1210 ) && !defined( __COMPILER_VER__ )
-
-# define BOOST_SP_HAS_SYNC
-
-#elif !defined( __c2__ ) && defined( __GNUC__ ) && ( __GNUC__ * 100 + __GNUC_MINOR__ >= 401 )
-
-#define BOOST_SP_HAS_SYNC
-
-#if defined( __arm__ )  || defined( __armel__ )
-#undef BOOST_SP_HAS_SYNC
-#endif
-
-#if defined( __hppa ) || defined( __hppa__ )
-#undef BOOST_SP_HAS_SYNC
-#endif
-
-#if defined( __m68k__ )
-#undef BOOST_SP_HAS_SYNC
-#endif
-
-#if defined( __sh__ )
-#undef BOOST_SP_HAS_SYNC
-#endif
-
-#if defined( __sparc__ )
-#undef BOOST_SP_HAS_SYNC
-#endif
-
-#if defined( __INTEL_COMPILER ) && !defined( __ia64__ ) && ( __INTEL_COMPILER < 1110 )
-#undef BOOST_SP_HAS_SYNC
-#endif
-
-#if defined(__PATHSCALE__) && ((__PATHCC__ == 4) && (__PATHCC_MINOR__ < 9)) 
-#undef BOOST_SP_HAS_SYNC
-#endif
-
-#endif
-
-#endif // #ifndef BOOST_SP_NO_SYNC
-
-#endif // #ifndef BOOST_SMART_PTR_DETAIL_SP_HAS_SYNC_HPP_INCLUDED

include/boost/smart_ptr/detail/sp_has_sync_intrinsics.hpp

@@ -0,0 +1,69 @@
+#ifndef BOOST_SMART_PTR_DETAIL_SP_HAS_SYNC_INTRINSICS_HPP_INCLUDED
+#define BOOST_SMART_PTR_DETAIL_SP_HAS_SYNC_INTRINSICS_HPP_INCLUDED
+
+// MS compatible compilers support #pragma once
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
+#endif
+
+//
+//  boost/smart_ptr/detail/sp_has_sync_intrinsics.hpp
+//
+//  Copyright (c) 2008, 2009 Peter Dimov
+//
+//  Distributed under the Boost Software License, Version 1.0.
+//  See accompanying file LICENSE_1_0.txt or copy at
+//  http://www.boost.org/LICENSE_1_0.txt)
+//
+//  Defines the BOOST_SP_HAS_SYNC_INTRINSICS macro if the __sync_* intrinsics
+//  are available.
+//
+
+#if !defined( BOOST_SP_NO_SYNC_INTRINSICS ) && !defined( BOOST_SP_NO_SYNC )
+
+#if defined( __GCC_HAVE_SYNC_COMPARE_AND_SWAP_4 ) && !defined( __c2__ )
+
+# define BOOST_SP_HAS_SYNC_INTRINSICS
+
+#elif defined( __IBMCPP__ ) && ( __IBMCPP__ >= 1210 ) && !defined( __COMPILER_VER__ )
+
+# define BOOST_SP_HAS_SYNC_INTRINSICS
+
+#elif defined( __GNUC__ ) && ( __GNUC__ * 100 + __GNUC_MINOR__ >= 401 ) && !defined( __c2__ )
+
+#define BOOST_SP_HAS_SYNC_INTRINSICS
+
+#if defined( __arm__ )  || defined( __armel__ )
+#undef BOOST_SP_HAS_SYNC_INTRINSICS
+#endif
+
+#if defined( __hppa ) || defined( __hppa__ )
+#undef BOOST_SP_HAS_SYNC_INTRINSICS
+#endif
+
+#if defined( __m68k__ )
+#undef BOOST_SP_HAS_SYNC_INTRINSICS
+#endif
+
+#if defined( __sh__ )
+#undef BOOST_SP_HAS_SYNC_INTRINSICS
+#endif
+
+#if defined( __sparc__ )
+#undef BOOST_SP_HAS_SYNC_INTRINSICS
+#endif
+
+#if defined( __INTEL_COMPILER ) && !defined( __ia64__ ) && ( __INTEL_COMPILER < 1110 )
+#undef BOOST_SP_HAS_SYNC_INTRINSICS
+#endif
+
+#if defined(__PATHSCALE__) && ((__PATHCC__ == 4) && (__PATHCC_MINOR__ < 9)) 
+#undef BOOST_SP_HAS_SYNC_INTRINSICS
+#endif
+
+#endif
+
+#endif // #if !defined( BOOST_SP_NO_SYNC_INTRINSICS ) && !defined( BOOST_SP_NO_SYNC )
+
+#endif // #ifndef BOOST_SMART_PTR_DETAIL_SP_HAS_SYNC_INTRINSICS_HPP_INCLUDED

include/boost/smart_ptr/detail/sp_obsolete.hpp

@@ -0,0 +1,32 @@
+#ifndef BOOST_SMART_PTR_DETAIL_SP_OBSOLETE_HPP_INCLUDED
+#define BOOST_SMART_PTR_DETAIL_SP_OBSOLETE_HPP_INCLUDED
+
+// MS compatible compilers support #pragma once
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
+#endif
+
+
+// boost/smart_ptr/detail/sp_obsolete.hpp
+//
+// Copyright 2020 Peter Dimov
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+//
+// Defines the BOOST_SP_OBSOLETE macro that emits a deprecation
+// message.
+
+#include <boost/config/pragma_message.hpp>
+
+#if !defined( BOOST_SP_NO_OBSOLETE_MESSAGE )
+
+#define BOOST_SP_OBSOLETE() BOOST_PRAGMA_MESSAGE("This platform-specific implementation is presumed obsolete and is slated for removal. If you want it retained, please open an issue in https://github.com/boostorg/smart_ptr.")
+
+#else
+
+#define BOOST_SP_OBSOLETE()
+
+#endif
+
+#endif // #ifndef BOOST_SMART_PTR_DETAIL_SP_OBSOLETE_HPP_INCLUDED

include/boost/smart_ptr/detail/sp_thread_pause.hpp

@@ -0,0 +1,51 @@
+#ifndef BOOST_SMART_PTR_DETAIL_SP_THREAD_PAUSE_HPP_INCLUDED
+#define BOOST_SMART_PTR_DETAIL_SP_THREAD_PAUSE_HPP_INCLUDED
+
+// MS compatible compilers support #pragma once
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
+#endif
+
+// boost/smart_ptr/detail/sp_thread_pause.hpp
+//
+// inline void bost::detail::sp_thread_pause();
+//
+//   Emits a "pause" instruction.
+//
+// Copyright 2008, 2020 Peter Dimov
+// Distributed under the Boost Software License, Version 1.0
+// https://www.boost.org/LICENSE_1_0.txt
+
+#if defined(_MSC_VER) && _MSC_VER >= 1310 && ( defined(_M_IX86) || defined(_M_X64) ) && !defined(__c2__)
+
+extern "C" void _mm_pause();
+
+#define BOOST_SP_PAUSE _mm_pause();
+
+#elif defined(__GNUC__) && ( defined(__i386__) || defined(__x86_64__) )
+
+#define BOOST_SP_PAUSE __asm__ __volatile__( "rep; nop" : : : "memory" );
+
+#else
+
+#define BOOST_SP_PAUSE
+
+#endif
+
+namespace boost
+{
+namespace detail
+{
+
+inline void sp_thread_pause()
+{
+    BOOST_SP_PAUSE
+}
+
+} // namespace detail
+} // namespace boost
+
+#undef BOOST_SP_PAUSE
+
+#endif // #ifndef BOOST_SMART_PTR_DETAIL_SP_THREAD_PAUSE_HPP_INCLUDED

include/boost/smart_ptr/detail/sp_thread_sleep.hpp

@@ -0,0 +1,104 @@
+#ifndef BOOST_SMART_PTR_DETAIL_SP_THREAD_SLEEP_HPP_INCLUDED
+#define BOOST_SMART_PTR_DETAIL_SP_THREAD_SLEEP_HPP_INCLUDED
+
+// MS compatible compilers support #pragma once
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
+#endif
+
+// boost/smart_ptr/detail/sp_thread_sleep.hpp
+//
+// inline void bost::detail::sp_thread_sleep();
+//
+//   Cease execution for a while to yield to other threads,
+//   as if by calling nanosleep() with an appropriate interval.
+//
+// Copyright 2008, 2020 Peter Dimov
+// Distributed under the Boost Software License, Version 1.0
+// https://www.boost.org/LICENSE_1_0.txt
+
+#include <boost/config.hpp>
+#include <boost/config/pragma_message.hpp>
+
+#if defined( WIN32 ) || defined( _WIN32 ) || defined( __WIN32__ ) || defined( __CYGWIN__ )
+
+#if defined(BOOST_SP_REPORT_IMPLEMENTATION)
+  BOOST_PRAGMA_MESSAGE("Using Sleep(1) in sp_thread_sleep")
+#endif
+
+#include <boost/smart_ptr/detail/sp_win32_sleep.hpp>
+
+namespace boost
+{
+
+namespace detail
+{
+
+inline void sp_thread_sleep()
+{
+    Sleep( 1 );
+}
+
+} // namespace detail
+
+} // namespace boost
+
+#elif defined(BOOST_HAS_NANOSLEEP)
+
+#if defined(BOOST_SP_REPORT_IMPLEMENTATION)
+  BOOST_PRAGMA_MESSAGE("Using nanosleep() in sp_thread_sleep")
+#endif
+
+#include <time.h>
+
+namespace boost
+{
+
+namespace detail
+{
+
+inline void sp_thread_sleep()
+{
+    // g++ -Wextra warns on {} or {0}
+    struct timespec rqtp = { 0, 0 };
+
+    // POSIX says that timespec has tv_sec and tv_nsec
+    // But it doesn't guarantee order or placement
+
+    rqtp.tv_sec = 0;
+    rqtp.tv_nsec = 1000;
+
+    nanosleep( &rqtp, 0 );
+}
+
+} // namespace detail
+
+} // namespace boost
+
+#else
+
+#if defined(BOOST_SP_REPORT_IMPLEMENTATION)
+  BOOST_PRAGMA_MESSAGE("Using sp_thread_yield() in sp_thread_sleep")
+#endif
+
+#include <boost/smart_ptr/detail/sp_thread_yield.hpp>
+
+namespace boost
+{
+
+namespace detail
+{
+
+inline void sp_thread_sleep()
+{
+    sp_thread_yield();
+}
+
+} // namespace detail
+
+} // namespace boost
+
+#endif
+
+#endif // #ifndef BOOST_SMART_PTR_DETAIL_SP_THREAD_SLEEP_HPP_INCLUDED

include/boost/smart_ptr/detail/sp_thread_yield.hpp

@@ -0,0 +1,100 @@
+#ifndef BOOST_SMART_PTR_DETAIL_SP_THREAD_YIELD_HPP_INCLUDED
+#define BOOST_SMART_PTR_DETAIL_SP_THREAD_YIELD_HPP_INCLUDED
+
+// MS compatible compilers support #pragma once
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
+#endif
+
+// boost/smart_ptr/detail/sp_thread_yield.hpp
+//
+// inline void bost::detail::sp_thread_yield();
+//
+//   Gives up the remainder of the time slice,
+//   as if by calling sched_yield().
+//
+// Copyright 2008, 2020 Peter Dimov
+// Distributed under the Boost Software License, Version 1.0
+// https://www.boost.org/LICENSE_1_0.txt
+
+#include <boost/config.hpp>
+#include <boost/config/pragma_message.hpp>
+
+#if defined( WIN32 ) || defined( _WIN32 ) || defined( __WIN32__ ) || defined( __CYGWIN__ )
+
+#if defined(BOOST_SP_REPORT_IMPLEMENTATION)
+  BOOST_PRAGMA_MESSAGE("Using Sleep(0) in sp_thread_yield")
+#endif
+
+#include <boost/smart_ptr/detail/sp_win32_sleep.hpp>
+
+namespace boost
+{
+
+namespace detail
+{
+
+inline void sp_thread_yield()
+{
+    Sleep( 0 );
+}
+
+} // namespace detail
+
+} // namespace boost
+
+#elif defined(BOOST_HAS_SCHED_YIELD)
+
+#if defined(BOOST_SP_REPORT_IMPLEMENTATION)
+  BOOST_PRAGMA_MESSAGE("Using sched_yield() in sp_thread_yield")
+#endif
+
+#ifndef _AIX
+# include <sched.h>
+#else
+  // AIX's sched.h defines ::var which sometimes conflicts with Lambda's var
+  extern "C" int sched_yield(void);
+#endif
+
+namespace boost
+{
+
+namespace detail
+{
+
+inline void sp_thread_yield()
+{
+    sched_yield();
+}
+
+} // namespace detail
+
+} // namespace boost
+
+#else
+
+#if defined(BOOST_SP_REPORT_IMPLEMENTATION)
+  BOOST_PRAGMA_MESSAGE("Using sp_thread_pause() in sp_thread_yield")
+#endif
+
+#include <boost/smart_ptr/detail/sp_thread_pause.hpp>
+
+namespace boost
+{
+
+namespace detail
+{
+
+inline void sp_thread_yield()
+{
+    sp_thread_pause();
+}
+
+} // namespace detail
+
+} // namespace boost
+
+#endif
+
+#endif // #ifndef BOOST_SMART_PTR_DETAIL_SP_THREAD_YIELD_HPP_INCLUDED

include/boost/smart_ptr/detail/sp_win32_sleep.hpp

@@ -0,0 +1,49 @@
+#ifndef BOOST_SMART_PTR_DETAIL_SP_WIN32_SLEEP_HPP_INCLUDED
+#define BOOST_SMART_PTR_DETAIL_SP_WIN32_SLEEP_HPP_INCLUDED
+
+// MS compatible compilers support #pragma once
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
+#endif
+
+// boost/smart_ptr/detail/sp_win32_sleep.hpp
+//
+// Declares the Win32 Sleep() function.
+//
+// Copyright 2008, 2020 Peter Dimov
+// Distributed under the Boost Software License, Version 1.0
+// https://www.boost.org/LICENSE_1_0.txt
+
+#if defined( BOOST_USE_WINDOWS_H )
+# include <windows.h>
+#endif
+
+namespace boost
+{
+namespace detail
+{
+
+#if !defined( BOOST_USE_WINDOWS_H )
+
+#if defined(__clang__) && defined(__x86_64__)
+// clang x64 warns that __stdcall is ignored
+# define BOOST_SP_STDCALL
+#else
+# define BOOST_SP_STDCALL __stdcall
+#endif
+
+#if defined(__LP64__) // Cygwin 64
+  extern "C" __declspec(dllimport) void BOOST_SP_STDCALL Sleep( unsigned int ms );
+#else
+  extern "C" __declspec(dllimport) void BOOST_SP_STDCALL Sleep( unsigned long ms );
+#endif
+
+#undef BOOST_SP_STDCALL
+
+#endif // !defined( BOOST_USE_WINDOWS_H )
+
+} // namespace detail
+} // namespace boost
+
+#endif // #ifndef BOOST_SMART_PTR_DETAIL_SP_WIN32_SLEEP_HPP_INCLUDED

include/boost/smart_ptr/detail/spinlock.hpp

@@ -28,28 +28,26 @@
 //  #define BOOST_DETAIL_SPINLOCK_INIT <unspecified>
 //
 
+#include <boost/smart_ptr/detail/sp_has_gcc_intrinsics.hpp>
+#include <boost/smart_ptr/detail/sp_has_sync_intrinsics.hpp>
 #include <boost/config.hpp>
-#include <boost/smart_ptr/detail/sp_has_sync.hpp>
 
 #if defined( BOOST_SP_USE_STD_ATOMIC )
-# if !defined( __clang__ )
-#   include <boost/smart_ptr/detail/spinlock_std_atomic.hpp>
-# else
-//  Clang (at least up to 3.4) can't compile spinlock_pool when
-//  using std::atomic, so substitute the __sync implementation instead.
-#   include <boost/smart_ptr/detail/spinlock_sync.hpp>
-# endif
+#  include <boost/smart_ptr/detail/spinlock_std_atomic.hpp>
 
 #elif defined( BOOST_SP_USE_PTHREADS )
 #  include <boost/smart_ptr/detail/spinlock_pt.hpp>
 
+#elif defined( BOOST_SP_HAS_GCC_INTRINSICS )
+#  include <boost/smart_ptr/detail/spinlock_gcc_atomic.hpp>
+
 #elif !defined( BOOST_NO_CXX11_HDR_ATOMIC )
 #  include <boost/smart_ptr/detail/spinlock_std_atomic.hpp>
 
 #elif defined(__GNUC__) && defined( __arm__ ) && !defined( __thumb__ )
 #  include <boost/smart_ptr/detail/spinlock_gcc_arm.hpp>
 
-#elif defined( BOOST_SP_HAS_SYNC )
+#elif defined( BOOST_SP_HAS_SYNC_INTRINSICS )
 #  include <boost/smart_ptr/detail/spinlock_sync.hpp>
 
 #elif defined(WIN32) || defined(_WIN32) || defined(__WIN32__) || defined(__CYGWIN__)

include/boost/smart_ptr/detail/spinlock_gcc_arm.hpp

@@ -11,6 +11,13 @@
 
 #include <boost/smart_ptr/detail/yield_k.hpp>
 
+#if defined(BOOST_SP_REPORT_IMPLEMENTATION)
+
+#include <boost/config/pragma_message.hpp>
+BOOST_PRAGMA_MESSAGE("Using g++/ARM spinlock")
+
+#endif
+
 #if defined(__ARM_ARCH_7__) || defined(__ARM_ARCH_7A__) || defined(__ARM_ARCH_7R__) || defined(__ARM_ARCH_7M__) || defined(__ARM_ARCH_7EM__) || defined(__ARM_ARCH_7S__)
 
 # define BOOST_SP_ARM_BARRIER "dmb"

include/boost/smart_ptr/detail/spinlock_gcc_atomic.hpp

@@ -0,0 +1,85 @@
+#ifndef BOOST_SMART_PTR_DETAIL_SPINLOCK_GCC_ATOMIC_HPP_INCLUDED
+#define BOOST_SMART_PTR_DETAIL_SPINLOCK_GCC_ATOMIC_HPP_INCLUDED
+
+// MS compatible compilers support #pragma once
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
+#endif
+
+// Copyright 2008, 2020 Peter Dimov
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+
+#include <boost/smart_ptr/detail/yield_k.hpp>
+
+#if defined(BOOST_SP_REPORT_IMPLEMENTATION)
+
+#include <boost/config/pragma_message.hpp>
+BOOST_PRAGMA_MESSAGE("Using __atomic spinlock")
+
+#endif
+
+namespace boost
+{
+
+namespace detail
+{
+
+class spinlock
+{
+public:
+
+    unsigned char v_;
+
+public:
+
+    bool try_lock()
+    {
+        return __atomic_test_and_set( &v_, __ATOMIC_ACQUIRE ) == 0;
+    }
+
+    void lock()
+    {
+        for( unsigned k = 0; !try_lock(); ++k )
+        {
+            boost::detail::yield( k );
+        }
+    }
+
+    void unlock()
+    {
+        __atomic_clear( &v_, __ATOMIC_RELEASE );
+    }
+
+public:
+
+    class scoped_lock
+    {
+    private:
+
+        spinlock & sp_;
+
+        scoped_lock( scoped_lock const & );
+        scoped_lock & operator=( scoped_lock const & );
+
+    public:
+
+        explicit scoped_lock( spinlock & sp ): sp_( sp )
+        {
+            sp.lock();
+        }
+
+        ~scoped_lock()
+        {
+            sp_.unlock();
+        }
+    };
+};
+
+} // namespace detail
+} // namespace boost
+
+#define BOOST_DETAIL_SPINLOCK_INIT {0}
+
+#endif // #ifndef BOOST_SMART_PTR_DETAIL_SPINLOCK_GCC_ATOMIC_HPP_INCLUDED

include/boost/smart_ptr/detail/spinlock_nt.hpp

@@ -17,6 +17,13 @@
 
 #include <boost/assert.hpp>
 
+#if defined(BOOST_SP_REPORT_IMPLEMENTATION)
+
+#include <boost/config/pragma_message.hpp>
+BOOST_PRAGMA_MESSAGE("Using single-threaded spinlock emulation")
+
+#endif
+
 namespace boost
 {
 

include/boost/smart_ptr/detail/spinlock_pt.hpp

@@ -17,6 +17,13 @@
 
 #include <pthread.h>
 
+#if defined(BOOST_SP_REPORT_IMPLEMENTATION)
+
+#include <boost/config/pragma_message.hpp>
+BOOST_PRAGMA_MESSAGE("Using pthread_mutex spinlock emulation")
+
+#endif
+
 namespace boost
 {
 

include/boost/smart_ptr/detail/spinlock_std_atomic.hpp

@@ -19,6 +19,13 @@
 #include <boost/config.hpp>
 #include <atomic>
 
+#if defined(BOOST_SP_REPORT_IMPLEMENTATION)
+
+#include <boost/config/pragma_message.hpp>
+BOOST_PRAGMA_MESSAGE("Using std::atomic spinlock")
+
+#endif
+
 namespace boost
 {
 

include/boost/smart_ptr/detail/spinlock_sync.hpp

@@ -21,6 +21,13 @@
 # include <ia64intrin.h>
 #endif
 
+#if defined(BOOST_SP_REPORT_IMPLEMENTATION)
+
+#include <boost/config/pragma_message.hpp>
+BOOST_PRAGMA_MESSAGE("Using __sync spinlock")
+
+#endif
+
 namespace boost
 {
 
@@ -31,7 +38,7 @@ class spinlock
 {
 public:
 
-    int v_;
+    unsigned char v_;
 
 public:
 

include/boost/smart_ptr/detail/spinlock_w32.hpp

@@ -18,6 +18,13 @@
 #include <boost/smart_ptr/detail/sp_interlocked.hpp>
 #include <boost/smart_ptr/detail/yield_k.hpp>
 
+#if defined(BOOST_SP_REPORT_IMPLEMENTATION)
+
+#include <boost/config/pragma_message.hpp>
+BOOST_PRAGMA_MESSAGE("Using Win32 spinlock")
+
+#endif
+
 // BOOST_COMPILER_FENCE
 
 #if defined(__INTEL_COMPILER)

include/boost/smart_ptr/detail/yield_k.hpp

@@ -7,107 +7,22 @@
 # pragma once
 #endif
 
+// boost/smart_ptr/detail/yield_k.hpp
 //
-//  yield_k.hpp
+// Copyright 2008, 2020 Peter Dimov
 //
-//  Copyright (c) 2008 Peter Dimov
+// inline void boost::detail::yield( unsigned k );
 //
-//  void yield( unsigned k );
-//
-//  Typical use:
-//
-//  for( unsigned k = 0; !try_lock(); ++k ) yield( k );
-//
-//  Distributed under the Boost Software License, Version 1.0.
-//  See accompanying file LICENSE_1_0.txt or copy at
-//  http://www.boost.org/LICENSE_1_0.txt
+//   Typical use:
+//   for( unsigned k = 0; !try_lock(); ++k ) yield( k );
 //
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
 
+#include <boost/smart_ptr/detail/sp_thread_pause.hpp>
+#include <boost/smart_ptr/detail/sp_thread_sleep.hpp>
 #include <boost/config.hpp>
 
-// BOOST_SMT_PAUSE
-
-#if defined(_MSC_VER) && _MSC_VER >= 1310 && ( defined(_M_IX86) || defined(_M_X64) ) && !defined(__c2__)
-
-extern "C" void _mm_pause();
-
-#define BOOST_SMT_PAUSE _mm_pause();
-
-#elif defined(__GNUC__) && ( defined(__i386__) || defined(__x86_64__) )
-
-#define BOOST_SMT_PAUSE __asm__ __volatile__( "rep; nop" : : : "memory" );
-
-#endif
-
-//
-
-#if defined( WIN32 ) || defined( _WIN32 ) || defined( __WIN32__ ) || defined( __CYGWIN__ )
-
-#if defined( BOOST_USE_WINDOWS_H )
-# include <windows.h>
-#endif
-
-namespace boost
-{
-
-namespace detail
-{
-
-#if !defined( BOOST_USE_WINDOWS_H )
-
-#if defined(__clang__) && defined(__x86_64__)
-// clang x64 warns that __stdcall is ignored
-# define BOOST_SP_STDCALL
-#else
-# define BOOST_SP_STDCALL __stdcall
-#endif
-
-#if defined(__LP64__) // Cygwin 64
-  extern "C" __declspec(dllimport) void BOOST_SP_STDCALL Sleep( unsigned int ms );
-#else
-  extern "C" __declspec(dllimport) void BOOST_SP_STDCALL Sleep( unsigned long ms );
-#endif
-
-#undef BOOST_SP_STDCALL
-
-#endif // !defined( BOOST_USE_WINDOWS_H )
-
-inline void yield( unsigned k ) BOOST_NOEXCEPT
-{
-    if( k < 4 )
-    {
-    }
-#if defined( BOOST_SMT_PAUSE )
-    else if( k < 16 )
-    {
-        BOOST_SMT_PAUSE
-    }
-#endif
-    else if( k < 32 )
-    {
-        Sleep( 0 );
-    }
-    else
-    {
-        Sleep( 1 );
-    }
-}
-
-} // namespace detail
-
-} // namespace boost
-
-#elif defined( BOOST_HAS_PTHREADS )
-
-#ifndef _AIX
-#include <sched.h>
-#else
-   // AIX's sched.h defines ::var which sometimes conflicts with Lambda's var
-       extern "C" int sched_yield(void);
-#endif
-
-#include <time.h>
-
 namespace boost
 {
 
@@ -116,31 +31,16 @@ namespace detail
 
 inline void yield( unsigned k )
 {
-    if( k < 4 )
+    // Experiments on Windows and Fedora 32 show that a single pause,
+    // followed by an immediate sp_thread_sleep(), is best.
+
+    if( k == 0 )
     {
-    }
-#if defined( BOOST_SMT_PAUSE )
-    else if( k < 16 )
-    {
-        BOOST_SMT_PAUSE
-    }
-#endif
-    else if( k < 32 || k & 1 )
-    {
-        sched_yield();
+        sp_thread_pause();
     }
     else
     {
-        // g++ -Wextra warns on {} or {0}
-        struct timespec rqtp = { 0, 0 };
-
-        // POSIX says that timespec has tv_sec and tv_nsec
-        // But it doesn't guarantee order or placement
-
-        rqtp.tv_sec = 0;
-        rqtp.tv_nsec = 1000;
-
-        nanosleep( &rqtp, 0 );
+        sp_thread_sleep();
     }
 }
 
@@ -148,22 +48,4 @@ inline void yield( unsigned k )
 
 } // namespace boost
 
-#else
-
-namespace boost
-{
-
-namespace detail
-{
-
-inline void yield( unsigned )
-{
-}
-
-} // namespace detail
-
-} // namespace boost
-
-#endif
-
 #endif // #ifndef BOOST_SMART_PTR_DETAIL_YIELD_K_HPP_INCLUDED

include/boost/smart_ptr/enable_shared_from.hpp

@@ -3,7 +3,7 @@
 
 //  enable_shared_from.hpp
 //
-//  Copyright 2019 Peter Dimov
+//  Copyright 2019, 2020 Peter Dimov
 //
 //  Distributed under the Boost Software License, Version 1.0.
 //  See accompanying file LICENSE_1_0.txt or copy at
@@ -19,17 +19,21 @@ namespace boost
 
 class enable_shared_from: public enable_shared_from_this<enable_shared_from>
 {
+private:
+
+    using enable_shared_from_this<enable_shared_from>::shared_from_this;
+    using enable_shared_from_this<enable_shared_from>::weak_from_this;
 };
 
 
 template<class T> shared_ptr<T> shared_from( T * p )
 {
-    return shared_ptr<T>( p->enable_shared_from::shared_from_this(), p );
+    return shared_ptr<T>( p->enable_shared_from_this<enable_shared_from>::shared_from_this(), p );
 }
 
 template<class T> weak_ptr<T> weak_from( T * p ) BOOST_SP_NOEXCEPT
 {
-    return weak_ptr<T>( p->enable_shared_from::weak_from_this(), p );
+    return weak_ptr<T>( p->enable_shared_from_this<enable_shared_from>::weak_from_this(), p );
 }
 
 } // namespace boost

include/boost/smart_ptr/intrusive_ptr.hpp

@@ -385,4 +385,23 @@ template< class T > std::size_t hash_value( boost::intrusive_ptr<T> const & p )
 
 } // namespace boost
 
+// std::hash
+
+#if !defined(BOOST_NO_CXX11_HDR_FUNCTIONAL)
+
+namespace std
+{
+
+template<class T> struct hash< ::boost::intrusive_ptr<T> >
+{
+    std::size_t operator()( ::boost::intrusive_ptr<T> const & p ) const BOOST_SP_NOEXCEPT
+    {
+        return std::hash< T* >()( p.get() );
+    }
+};
+
+} // namespace std
+
+#endif // #if !defined(BOOST_NO_CXX11_HDR_FUNCTIONAL)
+
 #endif  // #ifndef BOOST_SMART_PTR_INTRUSIVE_PTR_HPP_INCLUDED

include/boost/smart_ptr/local_shared_ptr.hpp

@@ -494,6 +494,13 @@ public:
     {
         return std::less< boost::detail::local_counted_base* >()( pn, r.pn );
     }
+
+    // owner_equals
+
+    template<class Y> bool owner_equals( local_shared_ptr<Y> const & r ) const BOOST_SP_NOEXCEPT
+    {
+        return pn == r.pn;
+    }
 };
 
 template<class T, class U> inline bool operator==( local_shared_ptr<T> const & a, local_shared_ptr<U> const & b ) BOOST_SP_NOEXCEPT
@@ -681,4 +688,23 @@ template< class T > std::size_t hash_value( local_shared_ptr<T> const & p ) BOOS
 
 } // namespace boost
 
+// std::hash
+
+#if !defined(BOOST_NO_CXX11_HDR_FUNCTIONAL)
+
+namespace std
+{
+
+template<class T> struct hash< ::boost::local_shared_ptr<T> >
+{
+    std::size_t operator()( ::boost::local_shared_ptr<T> const & p ) const BOOST_SP_NOEXCEPT
+    {
+        return std::hash< typename ::boost::local_shared_ptr<T>::element_type* >()( p.get() );
+    }
+};
+
+} // namespace std
+
+#endif // #if !defined(BOOST_NO_CXX11_HDR_FUNCTIONAL)
+
 #endif  // #ifndef BOOST_SMART_PTR_LOCAL_SHARED_PTR_HPP_INCLUDED

include/boost/smart_ptr/make_shared_object.hpp

@@ -187,7 +187,7 @@ template< class T > struct sp_if_not_array< T[] >
 {
 };
 
-#if !defined( __BORLANDC__ ) || !BOOST_WORKAROUND( __BORLANDC__, < 0x600 )
+#if !defined( BOOST_BORLANDC ) || !BOOST_WORKAROUND( BOOST_BORLANDC, < 0x600 )
 
 template< class T, std::size_t N > struct sp_if_not_array< T[N] >
 {

include/boost/smart_ptr/owner_equal_to.hpp

@@ -0,0 +1,27 @@
+#ifndef BOOST_SMART_PTR_OWNER_EQUAL_TO_HPP_INCLUDED
+#define BOOST_SMART_PTR_OWNER_EQUAL_TO_HPP_INCLUDED
+
+// Copyright 2020 Peter Dimov
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+
+#include <boost/config.hpp>
+
+namespace boost
+{
+
+template<class T = void> struct owner_equal_to
+{
+    typedef bool result_type;
+    typedef T first_argument_type;
+    typedef T second_argument_type;
+
+    template<class U, class V> bool operator()( U const & u, V const & v ) const BOOST_NOEXCEPT
+    {
+        return u.owner_equals( v );
+    }
+};
+
+} // namespace boost
+
+#endif  // #ifndef BOOST_SMART_PTR_OWNER_EQUAL_TO_HPP_INCLUDED

include/boost/smart_ptr/owner_hash.hpp

@@ -0,0 +1,27 @@
+#ifndef BOOST_SMART_PTR_OWNER_HASH_HPP_INCLUDED
+#define BOOST_SMART_PTR_OWNER_HASH_HPP_INCLUDED
+
+// Copyright 2020 Peter Dimov
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+
+#include <boost/config.hpp>
+#include <cstddef>
+
+namespace boost
+{
+
+template<class T> struct owner_hash
+{
+    typedef std::size_t result_type;
+    typedef T argument_type;
+
+    std::size_t operator()( T const & t ) const BOOST_NOEXCEPT
+    {
+        return t.owner_hash_value();
+    }
+};
+
+} // namespace boost
+
+#endif  // #ifndef BOOST_SMART_PTR_OWNER_HASH_HPP_INCLUDED

include/boost/smart_ptr/owner_less.hpp

@@ -14,6 +14,8 @@
 //  See http://www.boost.org/libs/smart_ptr/ for documentation.
 //
 
+#include <boost/config.hpp>
+
 namespace boost
 {
 
@@ -23,7 +25,7 @@ template<class T = void> struct owner_less
     typedef T first_argument_type;
     typedef T second_argument_type;
 
-    template<class U, class V> bool operator()( U const & u, V const & v ) const
+    template<class U, class V> bool operator()( U const & u, V const & v ) const BOOST_NOEXCEPT
     {
         return u.owner_before( v );
     }

include/boost/smart_ptr/shared_ptr.hpp

@@ -14,23 +14,16 @@
 //  See http://www.boost.org/libs/smart_ptr/ for documentation.
 //
 
-#include <boost/config.hpp>   // for broken compiler workarounds
-
-// In order to avoid circular dependencies with Boost.TR1
-// we make sure that our include of <memory> doesn't try to
-// pull in the TR1 headers: that's why we use this header 
-// rather than including <memory> directly:
-#include <boost/config/no_tr1/memory.hpp>  // std::auto_ptr
-
-#include <boost/assert.hpp>
-#include <boost/checked_delete.hpp>
-#include <boost/throw_exception.hpp>
 #include <boost/smart_ptr/detail/shared_count.hpp>
-#include <boost/config/workaround.hpp>
 #include <boost/smart_ptr/detail/sp_convertible.hpp>
 #include <boost/smart_ptr/detail/sp_nullptr_t.hpp>
 #include <boost/smart_ptr/detail/sp_disable_deprecated.hpp>
 #include <boost/smart_ptr/detail/sp_noexcept.hpp>
+#include <boost/checked_delete.hpp>
+#include <boost/throw_exception.hpp>
+#include <boost/assert.hpp>
+#include <boost/config.hpp>
+#include <boost/config/workaround.hpp>
 
 #if !defined(BOOST_SP_NO_ATOMIC_ACCESS)
 #include <boost/smart_ptr/detail/spinlock_pool.hpp>
@@ -40,6 +33,7 @@
 #include <functional>           // for std::less
 #include <typeinfo>             // for std::bad_cast
 #include <cstddef>              // for std::size_t
+#include <memory>               // for std::auto_ptr
 
 #if !defined(BOOST_NO_IOSTREAM)
 #if !defined(BOOST_NO_IOSFWD)
@@ -86,7 +80,7 @@ template< class T > struct sp_element< T[] >
     typedef T type;
 };
 
-#if !defined( __BORLANDC__ ) || !BOOST_WORKAROUND( __BORLANDC__, < 0x600 )
+#if !defined( BOOST_BORLANDC ) || !BOOST_WORKAROUND( BOOST_BORLANDC, < 0x600 )
 
 template< class T, std::size_t N > struct sp_element< T[N] >
 {
@@ -135,7 +129,7 @@ template< class T > struct sp_dereference< T[] >
     typedef void type;
 };
 
-#if !defined( __BORLANDC__ ) || !BOOST_WORKAROUND( __BORLANDC__, < 0x600 )
+#if !defined( BOOST_BORLANDC ) || !BOOST_WORKAROUND( BOOST_BORLANDC, < 0x600 )
 
 template< class T, std::size_t N > struct sp_dereference< T[N] >
 {
@@ -160,7 +154,7 @@ template< class T > struct sp_member_access< T[] >
     typedef void type;
 };
 
-#if !defined( __BORLANDC__ ) || !BOOST_WORKAROUND( __BORLANDC__, < 0x600 )
+#if !defined( BOOST_BORLANDC ) || !BOOST_WORKAROUND( BOOST_BORLANDC, < 0x600 )
 
 template< class T, std::size_t N > struct sp_member_access< T[N] >
 {
@@ -185,7 +179,7 @@ template< class T > struct sp_array_access< T[] >
     typedef T & type;
 };
 
-#if !defined( __BORLANDC__ ) || !BOOST_WORKAROUND( __BORLANDC__, < 0x600 )
+#if !defined( BOOST_BORLANDC ) || !BOOST_WORKAROUND( BOOST_BORLANDC, < 0x600 )
 
 template< class T, std::size_t N > struct sp_array_access< T[N] >
 {
@@ -777,6 +771,21 @@ public:
         return pn < rhs.pn;
     }
 
+    template<class Y> bool owner_equals( shared_ptr<Y> const & rhs ) const BOOST_SP_NOEXCEPT
+    {
+        return pn == rhs.pn;
+    }
+
+    template<class Y> bool owner_equals( weak_ptr<Y> const & rhs ) const BOOST_SP_NOEXCEPT
+    {
+        return pn == rhs.pn;
+    }
+
+    std::size_t owner_hash_value() const BOOST_SP_NOEXCEPT
+    {
+        return pn.hash_value();
+    }
+
     void * _internal_get_deleter( boost::detail::sp_typeinfo_ const & ti ) const BOOST_SP_NOEXCEPT
     {
         return pn.get_deleter( ti );
@@ -1155,6 +1164,25 @@ template< class T > std::size_t hash_value( boost::shared_ptr<T> const & p ) BOO
 
 } // namespace boost
 
+// std::hash
+
+#if !defined(BOOST_NO_CXX11_HDR_FUNCTIONAL)
+
+namespace std
+{
+
+template<class T> struct hash< ::boost::shared_ptr<T> >
+{
+    std::size_t operator()( ::boost::shared_ptr<T> const & p ) const BOOST_SP_NOEXCEPT
+    {
+        return std::hash< typename ::boost::shared_ptr<T>::element_type* >()( p.get() );
+    }
+};
+
+} // namespace std
+
+#endif // #if !defined(BOOST_NO_CXX11_HDR_FUNCTIONAL)
+
 #include <boost/smart_ptr/detail/local_sp_deleter.hpp>
 
 namespace boost
@@ -1175,6 +1203,13 @@ template<class D, class T> D const * basic_get_local_deleter( D const *, shared_
 
 } // namespace detail
 
+#if defined(__cpp_deduction_guides)
+
+template<class T> shared_ptr( weak_ptr<T> ) -> shared_ptr<T>;
+template<class T, class D> shared_ptr( std::unique_ptr<T, D> ) -> shared_ptr<T>;
+
+#endif
+
 } // namespace boost
 
 #if defined( BOOST_SP_DISABLE_DEPRECATED )

include/boost/smart_ptr/weak_ptr.hpp

@@ -13,10 +13,11 @@
 //  See http://www.boost.org/libs/smart_ptr/ for documentation.
 //
 
-#include <memory> // boost.TR1 include order fix
 #include <boost/smart_ptr/detail/shared_count.hpp>
 #include <boost/smart_ptr/shared_ptr.hpp>
 #include <boost/smart_ptr/detail/sp_noexcept.hpp>
+#include <memory>
+#include <cstddef>
 
 namespace boost
 {
@@ -237,6 +238,21 @@ public:
         return pn < rhs.pn;
     }
 
+    template<class Y> bool owner_equals( weak_ptr<Y> const & rhs ) const BOOST_SP_NOEXCEPT
+    {
+        return pn == rhs.pn;
+    }
+
+    template<class Y> bool owner_equals( shared_ptr<Y> const & rhs ) const BOOST_SP_NOEXCEPT
+    {
+        return pn == rhs.pn;
+    }
+
+    std::size_t owner_hash_value() const BOOST_SP_NOEXCEPT
+    {
+        return pn.hash_value();
+    }
+
 // Tasteless as this may seem, making all members public allows member templates
 // to work in the absence of member template friends. (Matthew Langston)
 
@@ -264,6 +280,46 @@ template<class T> void swap(weak_ptr<T> & a, weak_ptr<T> & b) BOOST_SP_NOEXCEPT
     a.swap(b);
 }
 
+#if defined(__cpp_deduction_guides)
+
+template<class T> weak_ptr( shared_ptr<T> ) -> weak_ptr<T>;
+
+#endif
+
+// hash_value
+
+template< class T > std::size_t hash_value( boost::weak_ptr<T> const & p ) BOOST_SP_NOEXCEPT
+{
+    return p.owner_hash_value();
+}
+
 } // namespace boost
 
+// std::hash, std::equal_to
+
+namespace std
+{
+
+#if !defined(BOOST_NO_CXX11_HDR_FUNCTIONAL)
+
+template<class T> struct hash< ::boost::weak_ptr<T> >
+{
+    std::size_t operator()( ::boost::weak_ptr<T> const & p ) const BOOST_SP_NOEXCEPT
+    {
+        return p.owner_hash_value();
+    }
+};
+
+#endif // #if !defined(BOOST_NO_CXX11_HDR_FUNCTIONAL)
+
+template<class T> struct equal_to< ::boost::weak_ptr<T> >
+{
+    bool operator()( ::boost::weak_ptr<T> const & a, ::boost::weak_ptr<T> const & b ) const BOOST_SP_NOEXCEPT
+    {
+        return a.owner_equals( b );
+    }
+};
+
+} // namespace std
+
 #endif  // #ifndef BOOST_SMART_PTR_WEAK_PTR_HPP_INCLUDED

test/CMakeLists.txt

@@ -0,0 +1,15 @@
+# Copyright 2018, 2019 Peter Dimov
+# Distributed under the Boost Software License, Version 1.0.
+# See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt
+
+include(BoostTestJamfile OPTIONAL RESULT_VARIABLE HAVE_BOOST_TEST)
+
+if(HAVE_BOOST_TEST)
+
+# for lw_thread_test.cpp
+set(THREADS_PREFER_PTHREAD_FLAG ON)
+find_package(Threads)
+
+boost_test_jamfile(FILE Jamfile LINK_LIBRARIES Boost::smart_ptr Boost::core Boost::align Boost::atomic Boost::container_hash Boost::bind Threads::Threads)
+
+endif()

test/Jamfile

@@ -57,10 +57,11 @@ run yield_k_test.cpp : : : <threading>multi : yield_k_test.mt ;
 run spinlock_test.cpp ;
 run spinlock_try_test.cpp ;
 run spinlock_try_test.cpp : : : <threading>multi : spinlock_try_test.mt ;
-run spinlock_pool_test.cpp : : :
-    # msvc-8.0, 9.0 optimizer codegen bug for `x % 41`
-    <toolset>msvc-8.0,<variant>release:<build>no
-    <toolset>msvc-9.0,<variant>release:<build>no ;
+run spinlock_pool_test.cpp
+  : : :
+  # msvc-8.0, 9.0 optimizer codegen bug for `x % 41`
+  <toolset>msvc-8.0,<variant>release:<build>no
+  <toolset>msvc-9.0,<variant>release:<build>no ;
 
 run make_shared_test.cpp ;
 run make_shared_move_emulation_test.cpp ;
@@ -78,7 +79,10 @@ run sp_recursive_assign_test.cpp ;
 run sp_recursive_assign2_test.cpp ;
 run sp_recursive_assign_rv_test.cpp ;
 run sp_recursive_assign2_rv_test.cpp ;
-compile-fail auto_ptr_lv_fail.cpp : <toolset>gcc-4.4.7:<build>no ;
+
+compile-fail auto_ptr_lv_fail.cpp
+  : <toolset>gcc-4.4.7:<build>no ;
+
 run atomic_count_test2.cpp ;
 run sp_typeinfo_test.cpp ;
 compile make_shared_fp_test.cpp ;
@@ -158,23 +162,33 @@ compile-fail array_fail_dereference.cpp ;
 compile-fail array_fail_member_access.cpp ;
 compile-fail array_fail_array_access.cpp ;
 
-run make_shared_array_test.cpp : : : <toolset>msvc-8.0:<build>no ;
-run make_shared_arrays_test.cpp ; # <cxxflags>-fno-deduce-init-list no longer needed for gcc-4.6
-run make_shared_array_throws_test.cpp : : : <toolset>msvc-8.0:<build>no ;
-run make_shared_array_esft_test.cpp : : : <toolset>msvc-8.0:<build>no ;
-run make_shared_array_noinit_test.cpp : : : <toolset>msvc-8.0:<build>no ;
-run make_shared_array_value_test.cpp : : : <toolset>msvc-8.0:<build>no ;
+run make_shared_array_test.cpp
+  : : : <toolset>msvc-8.0:<build>no ;
+run make_shared_arrays_test.cpp ;
+run make_shared_array_throws_test.cpp
+  : : : <toolset>msvc-8.0:<build>no ;
+run make_shared_array_esft_test.cpp
+  : : : <toolset>msvc-8.0:<build>no ;
+run make_shared_array_noinit_test.cpp
+  : : : <toolset>msvc-8.0:<build>no ;
+run make_shared_array_value_test.cpp
+  : : : <toolset>msvc-8.0:<build>no ;
 run allocate_shared_array_test.cpp ;
-run allocate_shared_arrays_test.cpp ; # <cxxflags>-fno-deduce-init-list no longer needed for gcc-4.6
-run allocate_shared_array_throws_test.cpp : : : <toolset>msvc-8.0:<build>no ;
-run allocate_shared_array_esft_test.cpp : : : <toolset>msvc-8.0:<build>no ;
-run allocate_shared_array_noinit_test.cpp : : : <toolset>msvc-8.0:<build>no ;
-run allocate_shared_array_value_test.cpp : : : <toolset>msvc-8.0:<build>no ;
+run allocate_shared_arrays_test.cpp ;
+run allocate_shared_array_throws_test.cpp
+  : : : <toolset>msvc-8.0:<build>no ;
+run allocate_shared_array_esft_test.cpp
+  : : : <toolset>msvc-8.0:<build>no ;
+run allocate_shared_array_noinit_test.cpp
+  : : : <toolset>msvc-8.0:<build>no ;
+run allocate_shared_array_value_test.cpp
+  : : : <toolset>msvc-8.0:<build>no ;
 run allocate_shared_array_construct_test.cpp ;
 
 run make_unique_test.cpp ;
 run make_unique_args_test.cpp ;
-run make_unique_value_test.cpp : : : <toolset>gcc-4.6:<cxxflags>-fno-deduce-init-list ;
+run make_unique_value_test.cpp
+  : : : <toolset>gcc-4.6:<cxxflags>-fno-deduce-init-list ;
 run make_unique_noinit_test.cpp ;
 run make_unique_throws_test.cpp ;
 run make_unique_array_test.cpp ;
@@ -236,7 +250,8 @@ run shared_ptr_fn_test.cpp ;
 run get_deleter_test2.cpp ;
 run get_deleter_test3.cpp ;
 run get_deleter_array_test2.cpp ;
-run get_deleter_array_test3.cpp : : : <toolset>msvc-8.0:<build>no ;
+run get_deleter_array_test3.cpp
+  : : : <toolset>msvc-8.0:<build>no ;
 
 run sp_convertible_test2.cpp ;
 
@@ -258,13 +273,15 @@ run allocate_local_shared_test.cpp ;
 run allocate_local_shared_esft_test.cpp ;
 
 run make_local_shared_array_test.cpp ;
-run make_local_shared_arrays_test.cpp : : : <toolset>gcc-4.6.3_0x:<cxxflags>-fno-deduce-init-list ;
+run make_local_shared_arrays_test.cpp
+  : : : <toolset>gcc-4.6.3_0x:<cxxflags>-fno-deduce-init-list ;
 run make_local_shared_array_throws_test.cpp ;
 run make_local_shared_array_esft_test.cpp ;
 run make_local_shared_array_noinit_test.cpp ;
 run make_local_shared_array_value_test.cpp ;
 run allocate_local_shared_array_test.cpp ;
-run allocate_local_shared_arrays_test.cpp : : : <toolset>gcc-4.6.3_0x:<cxxflags>-fno-deduce-init-list ;
+run allocate_local_shared_arrays_test.cpp
+  : : : <toolset>gcc-4.6.3_0x:<cxxflags>-fno-deduce-init-list ;
 run allocate_local_shared_array_throws_test.cpp ;
 run allocate_local_shared_array_esft_test.cpp ;
 run allocate_local_shared_array_noinit_test.cpp ;
@@ -275,9 +292,11 @@ run local_sp_fn_test.cpp ;
 run lsp_convertible_test.cpp ;
 run lsp_convertible_test2.cpp ;
 
-run make_shared_array_tmp_test.cpp : : : <toolset>msvc-8.0:<build>no ;
+run make_shared_array_tmp_test.cpp
+  : : : <toolset>msvc-8.0:<build>no ;
 
-run lw_thread_test.cpp : : : <threading>multi ;
+run lw_thread_test.cpp
+  : : : <threading>multi ;
 
 compile sp_windows_h_test.cpp ;
 compile spinlock_windows_h_test.cpp ;
@@ -333,3 +352,59 @@ run allocate_unique_noinit_test.cpp ;
 run allocate_unique_test.cpp ;
 run allocate_unique_throws_test.cpp ;
 run allocate_unique_value_test.cpp ;
+
+run sp_guides_test.cpp ;
+run sp_guides_test2.cpp ;
+run wp_guides_test.cpp ;
+
+compile-fail shared_from_fail.cpp ;
+compile-fail weak_from_fail.cpp ;
+
+compile sp_override_test.cpp ;
+compile sp_pedantic_test.cpp
+  : <warnings>pedantic
+    <toolset>msvc:<warnings-as-errors>on
+    <toolset>gcc:<warnings-as-errors>on
+    <toolset>clang:<warnings-as-errors>on ;
+
+run sp_owner_before_test.cpp ;
+run sp_owner_equals_test.cpp ;
+run lsp_owner_before_test.cpp ;
+run lsp_owner_equals_test.cpp ;
+
+run owner_equal_to_test.cpp ;
+run owner_equal_to_test2.cpp ;
+
+run owner_less_test2.cpp ;
+
+run ip_hash_test2.cpp ;
+run sp_hash_test4.cpp ;
+run lsp_hash_test.cpp ;
+run lsp_hash_test2.cpp ;
+
+run atomic_count_mt_test.cpp
+  : : : <threading>multi ;
+
+run spinlock_mt_test.cpp
+  : : : <threading>multi ;
+
+run spinlock_pool_mt_test.cpp
+  : : : <threading>multi ;
+
+run shared_ptr_mt_test.cpp
+  : : : <threading>multi ;
+
+run weak_ptr_mt_test.cpp
+  : : : <threading>multi ;
+
+compile sp_report_implementation.cpp ;
+
+run sp_owner_hash_value_test.cpp ;
+
+run wp_hash_test.cpp ;
+run wp_hash_test2.cpp ;
+
+run wp_unordered_test.cpp ;
+
+run owner_hash_test.cpp ;
+run sp_unordered_test.cpp ;

test/atomic_count_mt_test.cpp

@@ -0,0 +1,40 @@
+// Copyright 2018, 2020 Peter Dimov
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt)
+
+#include <boost/smart_ptr/detail/atomic_count.hpp>
+#include <boost/smart_ptr/detail/lightweight_thread.hpp>
+#include <boost/bind/bind.hpp>
+#include <boost/core/lightweight_test.hpp>
+
+static boost::detail::atomic_count count( 0 );
+
+void f( int n )
+{
+    for( int i = 0; i < n; ++i )
+    {
+        ++count;
+    }
+}
+
+int main()
+{
+    int const N = 100000; // iterations
+    int const M = 8;      // threads
+
+    boost::detail::lw_thread_t th[ M ] = {};
+
+    for( int i = 0; i < M; ++i )
+    {
+        boost::detail::lw_thread_create( th[ i ], boost::bind( f, N ) );
+    }
+
+    for( int i = 0; i < M; ++i )
+    {
+        boost::detail::lw_thread_join( th[ i ] );
+    }
+
+    BOOST_TEST_EQ( count, N * M );
+
+    return boost::report_errors();
+}

test/cmake_install_test/CMakeLists.txt

@@ -0,0 +1,18 @@
+# Copyright 2018, 2019 Peter Dimov
+# Distributed under the Boost Software License, Version 1.0.
+# See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt
+
+cmake_minimum_required(VERSION 3.5...3.16)
+
+project(cmake_subdir_test LANGUAGES CXX)
+
+find_package(boost_smart_ptr REQUIRED)
+find_package(boost_core REQUIRED)
+
+add_executable(quick ../quick.cpp)
+target_link_libraries(quick Boost::smart_ptr Boost::core)
+
+enable_testing()
+add_test(quick quick)
+
+add_custom_target(check COMMAND ${CMAKE_CTEST_COMMAND} --output-on-failure -C $<CONFIG>)

test/cmake_subdir_test/CMakeLists.txt

@@ -2,7 +2,7 @@
 # Distributed under the Boost Software License, Version 1.0.
 # See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt
 
-cmake_minimum_required(VERSION 3.5)
+cmake_minimum_required(VERSION 3.5...3.16)
 
 project(cmake_subdir_test LANGUAGES CXX)
 
@@ -11,7 +11,6 @@ add_subdirectory(../../../assert boostorg/assert)
 add_subdirectory(../../../config boostorg/config)
 add_subdirectory(../../../core boostorg/core)
 add_subdirectory(../../../move boostorg/move)
-add_subdirectory(../../../predef boostorg/predef)
 add_subdirectory(../../../static_assert boostorg/static_assert)
 add_subdirectory(../../../throw_exception boostorg/throw_exception)
 add_subdirectory(../../../type_traits boostorg/type_traits)

test/ip_hash_test2.cpp

@@ -0,0 +1,67 @@
+// Copyright 2011, 2020 Peter Dimov
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+
+#include <boost/intrusive_ptr.hpp>
+#include <boost/core/lightweight_test.hpp>
+#include <boost/config.hpp>
+#include <functional>
+
+#if defined(BOOST_NO_CXX11_HDR_FUNCTIONAL)
+
+int main() {}
+
+#else
+
+class base
+{
+private:
+
+    int use_count_;
+
+    base(base const &);
+    base & operator=(base const &);
+
+protected:
+
+    base(): use_count_(0)
+    {
+    }
+
+    virtual ~base()
+    {
+    }
+
+public:
+
+    long use_count() const
+    {
+        return use_count_;
+    }
+
+    inline friend void intrusive_ptr_add_ref(base * p)
+    {
+        ++p->use_count_;
+    }
+
+    inline friend void intrusive_ptr_release(base * p)
+    {
+        if(--p->use_count_ == 0) delete p;
+    }
+};
+
+struct X: public base
+{
+};
+
+int main()
+{
+    boost::intrusive_ptr<X> p1, p2( new X );
+
+    BOOST_TEST_EQ( std::hash< boost::intrusive_ptr<X> >()( p1 ), std::hash< X* >()( p1.get() ) );
+    BOOST_TEST_EQ( std::hash< boost::intrusive_ptr<X> >()( p2 ), std::hash< X* >()( p2.get() ) );
+
+    return boost::report_errors();
+}
+
+#endif // #if defined(BOOST_NO_CXX11_HDR_FUNCTIONAL)

test/lsp_hash_test.cpp

@@ -0,0 +1,66 @@
+// Copyright 2011, 2020 Peter Dimov
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+
+#include <boost/smart_ptr/local_shared_ptr.hpp>
+#include <boost/functional/hash.hpp>
+#include <boost/core/lightweight_test.hpp>
+
+int main()
+{
+    {
+        boost::hash< boost::local_shared_ptr<int> > hasher;
+
+        boost::local_shared_ptr<int> p1, p2( p1 ), p3( new int ), p4( p3 ), p5( new int );
+
+        BOOST_TEST_EQ( p1, p2 );
+        BOOST_TEST_EQ( hasher( p1 ), hasher( p2 ) );
+
+        BOOST_TEST_NE( p1, p3 );
+        BOOST_TEST_NE( hasher( p1 ), hasher( p3 ) );
+
+        BOOST_TEST_EQ( p3, p4 );
+        BOOST_TEST_EQ( hasher( p3 ), hasher( p4 ) );
+
+        BOOST_TEST_NE( p3, p5 );
+        BOOST_TEST_NE( hasher( p3 ), hasher( p5 ) );
+    }
+
+    {
+        boost::hash< boost::local_shared_ptr<int[]> > hasher;
+
+        boost::local_shared_ptr<int[]> p1, p2( p1 ), p3( new int[1] ), p4( p3 ), p5( new int[1] );
+
+        BOOST_TEST_EQ( p1, p2 );
+        BOOST_TEST_EQ( hasher( p1 ), hasher( p2 ) );
+
+        BOOST_TEST_NE( p1, p3 );
+        BOOST_TEST_NE( hasher( p1 ), hasher( p3 ) );
+
+        BOOST_TEST_EQ( p3, p4 );
+        BOOST_TEST_EQ( hasher( p3 ), hasher( p4 ) );
+
+        BOOST_TEST_NE( p3, p5 );
+        BOOST_TEST_NE( hasher( p3 ), hasher( p5 ) );
+    }
+
+    {
+        boost::hash< boost::local_shared_ptr<int[1]> > hasher;
+
+        boost::local_shared_ptr<int[1]> p1, p2( p1 ), p3( new int[1] ), p4( p3 ), p5( new int[1] );
+
+        BOOST_TEST_EQ( p1, p2 );
+        BOOST_TEST_EQ( hasher( p1 ), hasher( p2 ) );
+
+        BOOST_TEST_NE( p1, p3 );
+        BOOST_TEST_NE( hasher( p1 ), hasher( p3 ) );
+
+        BOOST_TEST_EQ( p3, p4 );
+        BOOST_TEST_EQ( hasher( p3 ), hasher( p4 ) );
+
+        BOOST_TEST_NE( p3, p5 );
+        BOOST_TEST_NE( hasher( p3 ), hasher( p5 ) );
+    }
+
+    return boost::report_errors();
+}

test/lsp_hash_test2.cpp

@@ -0,0 +1,42 @@
+// Copyright 2011, 2020 Peter Dimov
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+
+#include <boost/smart_ptr/local_shared_ptr.hpp>
+#include <boost/core/lightweight_test.hpp>
+#include <boost/config.hpp>
+#include <functional>
+
+#if defined(BOOST_NO_CXX11_HDR_FUNCTIONAL)
+
+int main() {}
+
+#else
+
+int main()
+{
+    {
+        boost::local_shared_ptr<int> p1, p2( new int );
+
+        BOOST_TEST_EQ( std::hash< boost::local_shared_ptr<int> >()( p1 ), std::hash< int* >()( p1.get() ) );
+        BOOST_TEST_EQ( std::hash< boost::local_shared_ptr<int> >()( p2 ), std::hash< int* >()( p2.get() ) );
+    }
+
+    {
+        boost::local_shared_ptr<int[]> p1, p2( new int[1] );
+
+        BOOST_TEST_EQ( std::hash< boost::local_shared_ptr<int[]> >()( p1 ), std::hash< int* >()( p1.get() ) );
+        BOOST_TEST_EQ( std::hash< boost::local_shared_ptr<int[]> >()( p2 ), std::hash< int* >()( p2.get() ) );
+    }
+
+    {
+        boost::local_shared_ptr<int[1]> p1, p2( new int[1] );
+
+        BOOST_TEST_EQ( std::hash< boost::local_shared_ptr<int[1]> >()( p1 ), std::hash< int* >()( p1.get() ) );
+        BOOST_TEST_EQ( std::hash< boost::local_shared_ptr<int[1]> >()( p2 ), std::hash< int* >()( p2.get() ) );
+    }
+
+    return boost::report_errors();
+}
+
+#endif // #if defined(BOOST_NO_CXX11_HDR_FUNCTIONAL)

test/lsp_owner_before_test.cpp

@@ -0,0 +1,103 @@
+// Copyright 2020 Peter Dimov
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+
+#include <boost/smart_ptr/local_shared_ptr.hpp>
+#include <boost/core/lightweight_test.hpp>
+
+int main()
+{
+    {
+        boost::local_shared_ptr<int> p1( new int );
+        boost::local_shared_ptr<int> p2( p1 );
+
+        BOOST_TEST( !p1.owner_before( p2 ) );
+        BOOST_TEST( !p2.owner_before( p1 ) );
+
+        boost::local_shared_ptr<int> p3( new int );
+
+        BOOST_TEST( p1.owner_before( p3 ) || p3.owner_before( p1 ) );
+
+        boost::local_shared_ptr<int> p4;
+        boost::local_shared_ptr<int> p5;
+
+        BOOST_TEST( !p4.owner_before( p5 ) );
+        BOOST_TEST( !p5.owner_before( p4 ) );
+
+        BOOST_TEST( p4.owner_before( p3 ) || p3.owner_before( p4 ) );
+
+        boost::local_shared_ptr<int> p6( static_cast<int*>(0) );
+
+        BOOST_TEST( p4.owner_before( p6 ) || p6.owner_before( p4 ) );
+
+        boost::local_shared_ptr<void> p7( p1 );
+
+        BOOST_TEST( !p1.owner_before( p7 ) );
+        BOOST_TEST( !p7.owner_before( p1 ) );
+
+        boost::local_shared_ptr<void> p8;
+
+        BOOST_TEST( p1.owner_before( p8 ) || p8.owner_before( p1 ) );
+
+        BOOST_TEST( !p4.owner_before( p8 ) );
+        BOOST_TEST( !p8.owner_before( p4 ) );
+/*
+        boost::local_weak_ptr<int> q1( p1 );
+
+        BOOST_TEST( !p1.owner_before( q1 ) );
+        BOOST_TEST( !q1.owner_before( p1 ) );
+
+        boost::local_weak_ptr<int> q2( p1 );
+
+        BOOST_TEST( !q1.owner_before( q2 ) );
+        BOOST_TEST( !q2.owner_before( q1 ) );
+
+        boost::local_weak_ptr<int> q3( p3 );
+
+        BOOST_TEST( p1.owner_before( q3 ) || q3.owner_before( p1 ) );
+        BOOST_TEST( q1.owner_before( q3 ) || q3.owner_before( q1 ) );
+
+        boost::local_weak_ptr<int> q4;
+
+        BOOST_TEST( !p4.owner_before( q4 ) );
+        BOOST_TEST( !q4.owner_before( p4 ) );
+
+        BOOST_TEST( q1.owner_before( q4 ) || q4.owner_before( q1 ) );
+
+        boost::local_weak_ptr<void> q5;
+
+        BOOST_TEST( !q4.owner_before( q5 ) );
+        BOOST_TEST( !q5.owner_before( q4 ) );
+
+        boost::local_weak_ptr<void> q7( p7 );
+
+        BOOST_TEST( !p1.owner_before( q7 ) );
+        BOOST_TEST( !q7.owner_before( p1 ) );
+
+        BOOST_TEST( !q1.owner_before( q7 ) );
+        BOOST_TEST( !q7.owner_before( q1 ) );
+
+        p1.reset();
+        p2.reset();
+        p3.reset();
+        p7.reset();
+
+        BOOST_TEST( q1.expired() );
+        BOOST_TEST( q2.expired() );
+        BOOST_TEST( q3.expired() );
+        BOOST_TEST( q7.expired() );
+
+        BOOST_TEST( !q1.owner_before( q2 ) );
+        BOOST_TEST( !q2.owner_before( q1 ) );
+
+        BOOST_TEST( !q1.owner_before( q7 ) );
+        BOOST_TEST( !q7.owner_before( q1 ) );
+
+        BOOST_TEST( q1.owner_before( q3 ) || q3.owner_before( q1 ) );
+
+        BOOST_TEST( q1.owner_before( q4 ) || q4.owner_before( q1 ) );
+*/
+    }
+
+    return boost::report_errors();
+}

test/lsp_owner_equals_test.cpp

@@ -0,0 +1,113 @@
+// Copyright 2020 Peter Dimov
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+
+#include <boost/smart_ptr/local_shared_ptr.hpp>
+#include <boost/core/lightweight_test.hpp>
+
+int main()
+{
+    {
+        boost::local_shared_ptr<int> p1( new int );
+        boost::local_shared_ptr<int> p2( p1 );
+
+        BOOST_TEST( p1.owner_equals( p2 ) );
+        BOOST_TEST( p2.owner_equals( p1 ) );
+
+        boost::local_shared_ptr<int> p3( new int );
+
+        BOOST_TEST( !p1.owner_equals( p3 ) );
+        BOOST_TEST( !p3.owner_equals( p1 ) );
+
+        boost::local_shared_ptr<int> p4;
+        boost::local_shared_ptr<int> p5;
+
+        BOOST_TEST( p4.owner_equals( p5 ) );
+        BOOST_TEST( p5.owner_equals( p4 ) );
+
+        BOOST_TEST( !p4.owner_equals( p3 ) );
+        BOOST_TEST( !p3.owner_equals( p4 ) );
+
+        boost::local_shared_ptr<int> p6( static_cast<int*>(0) );
+
+        BOOST_TEST( !p4.owner_equals( p6 ) );
+        BOOST_TEST( !p6.owner_equals( p4 ) );
+
+        boost::local_shared_ptr<void> p7( p1 );
+
+        BOOST_TEST( p1.owner_equals( p7 ) );
+        BOOST_TEST( p7.owner_equals( p1 ) );
+
+        boost::local_shared_ptr<void> p8;
+
+        BOOST_TEST( !p1.owner_equals( p8 ) );
+        BOOST_TEST( !p8.owner_equals( p1 ) );
+
+        BOOST_TEST( p4.owner_equals( p8 ) );
+        BOOST_TEST( p8.owner_equals( p4 ) );
+/*
+        boost::local_weak_ptr<int> q1( p1 );
+
+        BOOST_TEST( p1.owner_equals( q1 ) );
+        BOOST_TEST( q1.owner_equals( p1 ) );
+
+        boost::local_weak_ptr<int> q2( p1 );
+
+        BOOST_TEST( q1.owner_equals( q2 ) );
+        BOOST_TEST( q2.owner_equals( q1 ) );
+
+        boost::local_weak_ptr<int> q3( p3 );
+
+        BOOST_TEST( !p1.owner_equals( q3 ) );
+        BOOST_TEST( !q3.owner_equals( p1 ) );
+
+        BOOST_TEST( !q1.owner_equals( q3 ) );
+        BOOST_TEST( !q3.owner_equals( q1 ) );
+
+        boost::local_weak_ptr<int> q4;
+
+        BOOST_TEST( p4.owner_equals( q4 ) );
+        BOOST_TEST( q4.owner_equals( p4 ) );
+
+        BOOST_TEST( !q1.owner_equals( q4 ) );
+        BOOST_TEST( !q4.owner_equals( q1 ) );
+
+        boost::local_weak_ptr<void> q5;
+
+        BOOST_TEST( q4.owner_equals( q5 ) );
+        BOOST_TEST( q5.owner_equals( q4 ) );
+
+        boost::local_weak_ptr<void> q7( p7 );
+
+        BOOST_TEST( p1.owner_equals( q7 ) );
+        BOOST_TEST( q7.owner_equals( p1 ) );
+
+        BOOST_TEST( q1.owner_equals( q7 ) );
+        BOOST_TEST( q7.owner_equals( q1 ) );
+
+        p1.reset();
+        p2.reset();
+        p3.reset();
+        p7.reset();
+
+        BOOST_TEST( q1.expired() );
+        BOOST_TEST( q2.expired() );
+        BOOST_TEST( q3.expired() );
+        BOOST_TEST( q7.expired() );
+
+        BOOST_TEST( q1.owner_equals( q2 ) );
+        BOOST_TEST( q2.owner_equals( q1 ) );
+
+        BOOST_TEST( q1.owner_equals( q7 ) );
+        BOOST_TEST( q7.owner_equals( q1 ) );
+
+        BOOST_TEST( !q1.owner_equals( q3 ) );
+        BOOST_TEST( !q3.owner_equals( q1 ) );
+
+        BOOST_TEST( !q1.owner_equals( q4 ) );
+        BOOST_TEST( !q4.owner_equals( q1 ) );
+*/
+    }
+
+    return boost::report_errors();
+}

test/owner_equal_to_test.cpp

@@ -0,0 +1,116 @@
+// Copyright 2020 Peter Dimov
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+
+#include <boost/smart_ptr/owner_equal_to.hpp>
+#include <boost/shared_ptr.hpp>
+#include <boost/weak_ptr.hpp>
+#include <boost/core/lightweight_test.hpp>
+
+int main()
+{
+    boost::owner_equal_to<> const eq = {};
+
+    {
+        boost::shared_ptr<int> p1( new int );
+        boost::shared_ptr<int> p2( p1 );
+
+        BOOST_TEST( eq( p1, p2 ) );
+        BOOST_TEST( eq( p2, p1 ) );
+
+        boost::shared_ptr<int> p3( new int );
+
+        BOOST_TEST( !eq( p1, p3 ) );
+        BOOST_TEST( !eq( p3, p1 ) );
+
+        boost::shared_ptr<int> p4;
+        boost::shared_ptr<int> p5;
+
+        BOOST_TEST( eq( p4, p5 ) );
+        BOOST_TEST( eq( p5, p4 ) );
+
+        BOOST_TEST( !eq( p4, p3 ) );
+        BOOST_TEST( !eq( p3, p4 ) );
+
+        boost::shared_ptr<int> p6( static_cast<int*>(0) );
+
+        BOOST_TEST( !eq( p4, p6 ) );
+        BOOST_TEST( !eq( p6, p4 ) );
+
+        boost::shared_ptr<void> p7( p1 );
+
+        BOOST_TEST( eq( p1, p7 ) );
+        BOOST_TEST( eq( p7, p1 ) );
+
+        boost::shared_ptr<void> p8;
+
+        BOOST_TEST( !eq( p1, p8 ) );
+        BOOST_TEST( !eq( p8, p1 ) );
+
+        BOOST_TEST( eq( p4, p8 ) );
+        BOOST_TEST( eq( p8, p4 ) );
+
+        boost::weak_ptr<int> q1( p1 );
+
+        BOOST_TEST( eq( p1, q1 ) );
+        BOOST_TEST( eq( q1, p1 ) );
+
+        boost::weak_ptr<int> q2( p1 );
+
+        BOOST_TEST( eq( q1, q2 ) );
+        BOOST_TEST( eq( q2, q1 ) );
+
+        boost::weak_ptr<int> q3( p3 );
+
+        BOOST_TEST( !eq( p1, q3 ) );
+        BOOST_TEST( !eq( q3, p1 ) );
+
+        BOOST_TEST( !eq( q1, q3 ) );
+        BOOST_TEST( !eq( q3, q1 ) );
+
+        boost::weak_ptr<int> q4;
+
+        BOOST_TEST( eq( p4, q4 ) );
+        BOOST_TEST( eq( q4, p4 ) );
+
+        BOOST_TEST( !eq( q1, q4 ) );
+        BOOST_TEST( !eq( q4, q1 ) );
+
+        boost::weak_ptr<void> q5;
+
+        BOOST_TEST( eq( q4, q5 ) );
+        BOOST_TEST( eq( q5, q4 ) );
+
+        boost::weak_ptr<void> q7( p7 );
+
+        BOOST_TEST( eq( p1, q7 ) );
+        BOOST_TEST( eq( q7, p1 ) );
+
+        BOOST_TEST( eq( q1, q7 ) );
+        BOOST_TEST( eq( q7, q1 ) );
+
+        p1.reset();
+        p2.reset();
+        p3.reset();
+        p7.reset();
+
+        BOOST_TEST( q1.expired() );
+        BOOST_TEST( q2.expired() );
+        BOOST_TEST( q3.expired() );
+        BOOST_TEST( q7.expired() );
+
+        BOOST_TEST( eq( q1, q2 ) );
+        BOOST_TEST( eq( q2, q1 ) );
+
+        BOOST_TEST( eq( q1, q7 ) );
+        BOOST_TEST( eq( q7, q1 ) );
+
+        BOOST_TEST( !eq( q1, q3 ) );
+        BOOST_TEST( !eq( q3, q1 ) );
+
+        BOOST_TEST( !eq( q1, q4 ) );
+        BOOST_TEST( !eq( q4, q1 ) );
+    }
+
+    return boost::report_errors();
+}

test/owner_equal_to_test2.cpp

@@ -0,0 +1,116 @@
+// Copyright 2020 Peter Dimov
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+
+#include <boost/smart_ptr/owner_equal_to.hpp>
+#include <boost/smart_ptr/local_shared_ptr.hpp>
+#include <boost/core/lightweight_test.hpp>
+
+int main()
+{
+    boost::owner_equal_to<> const eq = {};
+
+    {
+        boost::local_shared_ptr<int> p1( new int );
+        boost::local_shared_ptr<int> p2( p1 );
+
+        BOOST_TEST( eq( p1, p2 ) );
+        BOOST_TEST( eq( p2, p1 ) );
+
+        boost::local_shared_ptr<int> p3( new int );
+
+        BOOST_TEST( !eq( p1, p3 ) );
+        BOOST_TEST( !eq( p3, p1 ) );
+
+        boost::local_shared_ptr<int> p4;
+        boost::local_shared_ptr<int> p5;
+
+        BOOST_TEST( eq( p4, p5 ) );
+        BOOST_TEST( eq( p5, p4 ) );
+
+        BOOST_TEST( !eq( p4, p3 ) );
+        BOOST_TEST( !eq( p3, p4 ) );
+
+        boost::local_shared_ptr<int> p6( static_cast<int*>(0) );
+
+        BOOST_TEST( !eq( p4, p6 ) );
+        BOOST_TEST( !eq( p6, p4 ) );
+
+        boost::local_shared_ptr<void> p7( p1 );
+
+        BOOST_TEST( eq( p1, p7 ) );
+        BOOST_TEST( eq( p7, p1 ) );
+
+        boost::local_shared_ptr<void> p8;
+
+        BOOST_TEST( !eq( p1, p8 ) );
+        BOOST_TEST( !eq( p8, p1 ) );
+
+        BOOST_TEST( eq( p4, p8 ) );
+        BOOST_TEST( eq( p8, p4 ) );
+/*
+        boost::local_weak_ptr<int> q1( p1 );
+
+        BOOST_TEST( eq( p1, q1 ) );
+        BOOST_TEST( eq( q1, p1 ) );
+
+        boost::local_weak_ptr<int> q2( p1 );
+
+        BOOST_TEST( eq( q1, q2 ) );
+        BOOST_TEST( eq( q2, q1 ) );
+
+        boost::local_weak_ptr<int> q3( p3 );
+
+        BOOST_TEST( !eq( p1, q3 ) );
+        BOOST_TEST( !eq( q3, p1 ) );
+
+        BOOST_TEST( !eq( q1, q3 ) );
+        BOOST_TEST( !eq( q3, q1 ) );
+
+        boost::local_weak_ptr<int> q4;
+
+        BOOST_TEST( eq( p4, q4 ) );
+        BOOST_TEST( eq( q4, p4 ) );
+
+        BOOST_TEST( !eq( q1, q4 ) );
+        BOOST_TEST( !eq( q4, q1 ) );
+
+        boost::local_weak_ptr<void> q5;
+
+        BOOST_TEST( eq( q4, q5 ) );
+        BOOST_TEST( eq( q5, q4 ) );
+
+        boost::local_weak_ptr<void> q7( p7 );
+
+        BOOST_TEST( eq( p1, q7 ) );
+        BOOST_TEST( eq( q7, p1 ) );
+
+        BOOST_TEST( eq( q1, q7 ) );
+        BOOST_TEST( eq( q7, q1 ) );
+
+        p1.reset();
+        p2.reset();
+        p3.reset();
+        p7.reset();
+
+        BOOST_TEST( q1.expired() );
+        BOOST_TEST( q2.expired() );
+        BOOST_TEST( q3.expired() );
+        BOOST_TEST( q7.expired() );
+
+        BOOST_TEST( eq( q1, q2 ) );
+        BOOST_TEST( eq( q2, q1 ) );
+
+        BOOST_TEST( eq( q1, q7 ) );
+        BOOST_TEST( eq( q7, q1 ) );
+
+        BOOST_TEST( !eq( q1, q3 ) );
+        BOOST_TEST( !eq( q3, q1 ) );
+
+        BOOST_TEST( !eq( q1, q4 ) );
+        BOOST_TEST( !eq( q4, q1 ) );
+*/
+    }
+
+    return boost::report_errors();
+}

test/owner_hash_test.cpp

@@ -0,0 +1,88 @@
+// Copyright 2020 Peter Dimov
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+
+#include <boost/smart_ptr/owner_hash.hpp>
+#include <boost/shared_ptr.hpp>
+#include <boost/weak_ptr.hpp>
+#include <boost/core/lightweight_test.hpp>
+
+template<class T> std::size_t hash_( T const& t )
+{
+    return boost::owner_hash<T>()( t );
+}
+
+int main()
+{
+    boost::shared_ptr<int> p1( new int );
+    boost::shared_ptr<int> p2( p1 );
+
+    BOOST_TEST_EQ( hash_( p1 ), hash_( p2 ) );
+
+    boost::shared_ptr<int> p3( new int );
+
+    BOOST_TEST_NE( hash_( p1 ), hash_( p3 ) );
+
+    boost::shared_ptr<int> p4;
+    boost::shared_ptr<int> p5;
+
+    BOOST_TEST_EQ( hash_( p4 ), hash_( p5 ) );
+    BOOST_TEST_NE( hash_( p4 ), hash_( p3 ) );
+
+    boost::shared_ptr<int> p6( static_cast<int*>(0) );
+
+    BOOST_TEST_NE( hash_( p4 ), hash_( p6 ) );
+
+    boost::shared_ptr<void> p7( p1 );
+
+    BOOST_TEST_EQ( hash_( p1 ), hash_( p7 ) );
+
+    boost::shared_ptr<void> p8;
+
+    BOOST_TEST_NE( hash_( p1 ), hash_( p8 ) );
+    BOOST_TEST_EQ( hash_( p4 ), hash_( p8 ) );
+
+    boost::weak_ptr<int> q1( p1 );
+
+    BOOST_TEST_EQ( hash_( p1 ), hash_( q1 ) );
+
+    boost::weak_ptr<int> q2( p1 );
+
+    BOOST_TEST_EQ( hash_( q1 ), hash_( q2 ) );
+
+    boost::weak_ptr<int> q3( p3 );
+
+    BOOST_TEST_NE( hash_( p1 ), hash_( q3 ) );
+    BOOST_TEST_NE( hash_( q1 ), hash_( q3 ) );
+
+    boost::weak_ptr<int> q4;
+
+    BOOST_TEST_EQ( hash_( p4 ), hash_( q4 ) );
+    BOOST_TEST_NE( hash_( q1 ), hash_( q4 ) );
+
+    boost::weak_ptr<void> q5;
+
+    BOOST_TEST_EQ( hash_( q4 ), hash_( q5 ) );
+
+    boost::weak_ptr<void> q7( p7 );
+
+    BOOST_TEST_EQ( hash_( p1 ), hash_( q7 ) );
+    BOOST_TEST_EQ( hash_( q1 ), hash_( q7 ) );
+
+    p1.reset();
+    p2.reset();
+    p3.reset();
+    p7.reset();
+
+    BOOST_TEST( q1.expired() );
+    BOOST_TEST( q2.expired() );
+    BOOST_TEST( q3.expired() );
+    BOOST_TEST( q7.expired() );
+
+    BOOST_TEST_EQ( hash_( q1 ), hash_( q2 ) );
+    BOOST_TEST_EQ( hash_( q1 ), hash_( q7 ) );
+    BOOST_TEST_NE( hash_( q1 ), hash_( q3 ) );
+    BOOST_TEST_NE( hash_( q1 ), hash_( q4 ) );
+
+    return boost::report_errors();
+}

test/owner_less_test2.cpp

@@ -0,0 +1,106 @@
+// Copyright 2020 Peter Dimov
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+
+#include <boost/smart_ptr/owner_less.hpp>
+#include <boost/smart_ptr/local_shared_ptr.hpp>
+#include <boost/core/lightweight_test.hpp>
+
+int main()
+{
+    boost::owner_less<> const lt = {};
+
+    {
+        boost::local_shared_ptr<int> p1( new int );
+        boost::local_shared_ptr<int> p2( p1 );
+
+        BOOST_TEST( !lt( p1, p2 ) );
+        BOOST_TEST( !lt( p2, p1 ) );
+
+        boost::local_shared_ptr<int> p3( new int );
+
+        BOOST_TEST( lt( p1, p3 ) || lt( p3, p1 ) );
+
+        boost::local_shared_ptr<int> p4;
+        boost::local_shared_ptr<int> p5;
+
+        BOOST_TEST( !lt( p4, p5 ) );
+        BOOST_TEST( !lt( p5, p4 ) );
+
+        BOOST_TEST( lt( p4, p3 ) || lt( p3, p4 ) );
+
+        boost::local_shared_ptr<int> p6( static_cast<int*>(0) );
+
+        BOOST_TEST( lt( p4, p6 ) || lt( p6, p4 ) );
+
+        boost::local_shared_ptr<void> p7( p1 );
+
+        BOOST_TEST( !lt( p1, p7 ) );
+        BOOST_TEST( !lt( p7, p1 ) );
+
+        boost::local_shared_ptr<void> p8;
+
+        BOOST_TEST( lt( p1, p8 ) || lt( p8, p1 ) );
+
+        BOOST_TEST( !lt( p4, p8 ) );
+        BOOST_TEST( !lt( p8, p4 ) );
+/*
+        boost::local_weak_ptr<int> q1( p1 );
+
+        BOOST_TEST( !lt( p1, q1 ) );
+        BOOST_TEST( !lt( q1, p1 ) );
+
+        boost::local_weak_ptr<int> q2( p1 );
+
+        BOOST_TEST( !lt( q1, q2 ) );
+        BOOST_TEST( !lt( q2, q1 ) );
+
+        boost::local_weak_ptr<int> q3( p3 );
+
+        BOOST_TEST( lt( p1, q3 ) || lt( q3, p1 ) );
+        BOOST_TEST( lt( q1, q3 ) || lt( q3, q1 ) );
+
+        boost::local_weak_ptr<int> q4;
+
+        BOOST_TEST( !lt( p4, q4 ) );
+        BOOST_TEST( !lt( q4, p4 ) );
+
+        BOOST_TEST( lt( q1, q4 ) || lt( q4, q1 ) );
+
+        boost::local_weak_ptr<void> q5;
+
+        BOOST_TEST( !lt( q4, q5 ) );
+        BOOST_TEST( !lt( q5, q4 ) );
+
+        boost::local_weak_ptr<void> q7( p7 );
+
+        BOOST_TEST( !lt( p1, q7 ) );
+        BOOST_TEST( !lt( q7, p1 ) );
+
+        BOOST_TEST( !lt( q1, q7 ) );
+        BOOST_TEST( !lt( q7, q1 ) );
+
+        p1.reset();
+        p2.reset();
+        p3.reset();
+        p7.reset();
+
+        BOOST_TEST( q1.expired() );
+        BOOST_TEST( q2.expired() );
+        BOOST_TEST( q3.expired() );
+        BOOST_TEST( q7.expired() );
+
+        BOOST_TEST( !lt( q1, q2 ) );
+        BOOST_TEST( !lt( q2, q1 ) );
+
+        BOOST_TEST( !lt( q1, q7 ) );
+        BOOST_TEST( !lt( q7, q1 ) );
+
+        BOOST_TEST( lt( q1, q3 ) || lt( q3, q1 ) );
+
+        BOOST_TEST( lt( q1, q4 ) || lt( q4, q1 ) );
+*/
+    }
+
+    return boost::report_errors();
+}

test/shared_from_fail.cpp

@@ -0,0 +1,22 @@
+// Copyright 2020 Peter Dimov
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+
+#include <boost/shared_ptr.hpp>
+#include <boost/smart_ptr/enable_shared_from.hpp>
+
+struct X: public boost::enable_shared_from
+{
+};
+
+#if defined(__clang__) && defined(_MSC_VER)
+// clang-cl claims that it accepts this code for compatibility
+// with msvc, but no version of msvc accepts it
+#  pragma clang diagnostic error "-Wmicrosoft-using-decl"
+#endif
+
+int main()
+{
+    boost::shared_ptr<X> px( new X );
+    px->shared_from_this();
+}