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|---|---|---|
| 7c673cae FG |
1 | #ifndef BOOST_SMART_PTR_DETAIL_ATOMIC_COUNT_SYNC_HPP_INCLUDED |
| 2 | #define BOOST_SMART_PTR_DETAIL_ATOMIC_COUNT_SYNC_HPP_INCLUDED | |
| 3 | ||
| 4 | // | |
| 5 | // boost/detail/atomic_count_sync.hpp | |
| 6 | // | |
| 7 | // atomic_count for g++ 4.1+ | |
| 8 | // | |
| 9 | // http://gcc.gnu.org/onlinedocs/gcc-4.1.1/gcc/Atomic-Builtins.html | |
| 10 | // | |
| 11 | // Copyright 2007 Peter Dimov | |
| 12 | // | |
| 13 | // Distributed under the Boost Software License, Version 1.0. (See | |
| 14 | // accompanying file LICENSE_1_0.txt or copy at | |
| 15 | // http://www.boost.org/LICENSE_1_0.txt) | |
| 16 | // | |
| 17 | ||
| 18 | #if defined( __ia64__ ) && defined( __INTEL_COMPILER ) | |
| 19 | # include <ia64intrin.h> | |
| 20 | #endif | |
| 21 | ||
| 22 | namespace boost | |
| 23 | { | |
| 24 | ||
| 25 | namespace detail | |
| 26 | { | |
| 27 | ||
| 28 | class atomic_count | |
| 29 | { | |
| 30 | public: | |
| 31 | ||
| 32 | explicit atomic_count( long v ) : value_( v ) {} | |
| 33 | ||
| 34 | long operator++() | |
| 35 | { | |
| 36 | return __sync_add_and_fetch( &value_, 1 ); | |
| 37 | } | |
| 38 | ||
| 39 | long operator--() | |
| 40 | { | |
| 41 | return __sync_add_and_fetch( &value_, -1 ); | |
| 42 | } | |
| 43 | ||
| 44 | operator long() const | |
| 45 | { | |
| 46 | return __sync_fetch_and_add( &value_, 0 ); | |
| 47 | } | |
| 48 | ||
| 49 | private: | |
| 50 | ||
| 51 | atomic_count(atomic_count const &); | |
| 52 | atomic_count & operator=(atomic_count const &); | |
| 53 | ||
| 54 | mutable long value_; | |
| 55 | }; | |
| 56 | ||
| 57 | } // namespace detail | |
| 58 | ||
| 59 | } // namespace boost | |
| 60 | ||
| 61 | #endif // #ifndef BOOST_SMART_PTR_DETAIL_ATOMIC_COUNT_SYNC_HPP_INCLUDED |