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61 lines
1.2 KiB
61 lines
1.2 KiB
#ifndef BOOST_SMART_PTR_DETAIL_ATOMIC_COUNT_SYNC_HPP_INCLUDED |
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#define BOOST_SMART_PTR_DETAIL_ATOMIC_COUNT_SYNC_HPP_INCLUDED |
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// |
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// boost/detail/atomic_count_sync.hpp |
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// |
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// atomic_count for g++ 4.1+ |
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// |
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// http://gcc.gnu.org/onlinedocs/gcc-4.1.1/gcc/Atomic-Builtins.html |
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// |
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// Copyright 2007 Peter Dimov |
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// |
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// Distributed under the Boost Software License, Version 1.0. (See |
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// accompanying file LICENSE_1_0.txt or copy at |
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// http://www.boost.org/LICENSE_1_0.txt) |
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// |
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#if defined( __ia64__ ) && defined( __INTEL_COMPILER ) |
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# include <ia64intrin.h> |
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#endif |
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namespace boost |
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{ |
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namespace detail |
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{ |
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class atomic_count |
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{ |
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public: |
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explicit atomic_count( long v ) : value_( v ) {} |
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long operator++() |
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{ |
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return __sync_add_and_fetch( &value_, 1 ); |
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} |
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long operator--() |
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{ |
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return __sync_add_and_fetch( &value_, -1 ); |
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} |
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operator long() const |
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{ |
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return __sync_fetch_and_add( &value_, 0 ); |
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} |
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private: |
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atomic_count(atomic_count const &); |
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atomic_count & operator=(atomic_count const &); |
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mutable long value_; |
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}; |
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} // namespace detail |
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} // namespace boost |
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#endif // #ifndef BOOST_SMART_PTR_DETAIL_ATOMIC_COUNT_SYNC_HPP_INCLUDED
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