feedc0de/boost_smart_ptr
1
0
Fork 0
forked from boostorg/smart_ptr
Code Pull Requests Activity

Remove Clang C11 implementation; no longer used

Browse Source
This commit is contained in:
Peter Dimov
2020-06-07 02:05:55 +03:00
parent c66c4f5ed1
commit 15ffd7852b
1 changed files with 0 additions and 168 deletions
Download Patch File Download Diff File Expand all files Collapse all files

168
include/boost/smart_ptr/detail/sp_counted_base_clang.hpp
View File

@ -1,168 +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>
#if defined(BOOST_SP_REPORT_IMPLEMENTATION)
#include <boost/config/pragma_message.hpp>
BOOST_PRAGMA_MESSAGE("Using Clang/C11 sp_counted_base")
#endif
namespace boost
{
namespace detail
{
#if defined(__clang__)
# pragma clang diagnostic push
#endif
#if defined(__clang__) && defined(__has_warning)
# if __has_warning( "-Wc11-extensions" )
# pragma clang diagnostic ignored "-Wc11-extensions"
# endif
#endif
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 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