From 91f3aa0386ed16b78747bdaac8e2ec7d1a3b6ac4 Mon Sep 17 00:00:00 2001
From: Peter Dimov <pdimov@gmail.com>
Date: Mon, 1 Jun 2020 01:35:25 +0300
Subject: [PATCH] Add local_shared_ptr::owner_equals

---
 include/boost/smart_ptr/local_shared_ptr.hpp |   7 ++
 test/Jamfile                                 |   1 +
 test/lsp_owner_equals_test.cpp               | 113 +++++++++++++++++++
 3 files changed, 121 insertions(+)
 create mode 100644 test/lsp_owner_equals_test.cpp

diff --git a/include/boost/smart_ptr/local_shared_ptr.hpp b/include/boost/smart_ptr/local_shared_ptr.hpp
index 1bf1fdf..30f3f32 100644
--- a/include/boost/smart_ptr/local_shared_ptr.hpp
+++ b/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
diff --git a/test/Jamfile b/test/Jamfile
index d094b52..51be6a5 100644
--- a/test/Jamfile
+++ b/test/Jamfile
@@ -370,3 +370,4 @@ compile sp_pedantic_test.cpp
 run sp_owner_before_test.cpp ;
 run sp_owner_equals_test.cpp ;
 run lsp_owner_before_test.cpp ;
+run lsp_owner_equals_test.cpp ;
diff --git a/test/lsp_owner_equals_test.cpp b/test/lsp_owner_equals_test.cpp
new file mode 100644
index 0000000..8044576
--- /dev/null
+++ b/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();
+}