mirror of
https://github.com/boostorg/smart_ptr.git
synced 2025-10-16 09:25:26 +02:00
62 lines
1.3 KiB
C++
62 lines
1.3 KiB
C++
|
#ifndef BOOST_DETAIL_ATOMIC_COUNT_GCC_HPP_INCLUDED
|
|||
|
|
#define BOOST_DETAIL_ATOMIC_COUNT_GCC_HPP_INCLUDED
|
|||
|
|
|
|||
|
|
//
|
|||
|
|
// boost/detail/atomic_count_gcc.hpp
|
|||
|
|
//
|
|||
|
|
// atomic_count for GNU libstdc++ v3
|
|||
|
|
//
|
|||
|
|
// http://gcc.gnu.org/onlinedocs/porting/Thread-safety.html
|
|||
|
|
//
|
|||
|
|
// Copyright (c) 2001, 2002 Peter Dimov and Multi Media Ltd.
|
|||
|
|
// Copyright (c) 2002 Lars Gullik Bj<42>nnes <larsbj@lyx.org>
|
|||
|
|
//
|
|||
|
|
// Permission to copy, use, modify, sell and distribute this software
|
|||
|
|
// is granted provided this copyright notice appears in all copies.
|
|||
|
|
// This software is provided "as is" without express or implied
|
|||
|
|
// warranty, and with no claim as to its suitability for any purpose.
|
|||
|
|
//
|
|||
|
|
|
|||
|
|
#include <bits/atomicity.h>
|
|||
|
|
|
|||
|
|
namespace boost
|
|||
|
|
{
|
|||
|
|
|
|||
|
|
namespace detail
|
|||
|
|
{
|
|||
|
|
|
|||
|
|
class atomic_count
|
|||
|
|
{
|
|||
|
|
public:
|
|||
|
|
|
|||
|
|
explicit atomic_count(long v) : value_(v) {}
|
|||
|
|
|
|||
|
|
void operator++()
|
|||
|
|
{
|
|||
|
|
__atomic_add(&value_, 1);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
long operator--()
|
|||
|
|
{
|
|||
|
|
return !__exchange_and_add(&value_, -1);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
operator long() const
|
|||
|
|
{
|
|||
|
|
return __exchange_and_add(&value_, 0);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
private:
|
|||
|
|
|
|||
|
|
atomic_count(atomic_count const &);
|
|||
|
|
atomic_count & operator=(atomic_count const &);
|
|||
|
|
|
|||
|
|
_Atomic_word value_;
|
|||
|
|
};
|
|||
|
|
|
|||
|
|
} // namespace detail
|
|||
|
|
|
|||
|
|
} // namespace boost
|
|||
|
|
|
|||
|
|
#endif // #ifndef BOOST_DETAIL_ATOMIC_COUNT_GCC_HPP_INCLUDED
|