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69 lines
1.3 KiB
C++
69 lines
1.3 KiB
C++
#ifndef BOOST_DETAIL_ATOMIC_COUNT_WIN32_HPP_INCLUDED
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#define BOOST_DETAIL_ATOMIC_COUNT_WIN32_HPP_INCLUDED
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#if _MSC_VER >= 1020
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#pragma once
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#endif
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//
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// boost/detail/atomic_count_win32.hpp
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//
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// Copyright (c) 2001, 2002 Peter Dimov and Multi Media Ltd.
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//
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// Permission to copy, use, modify, sell and distribute this software
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// is granted provided this copyright notice appears in all copies.
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// This software is provided "as is" without express or implied
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// warranty, and with no claim as to its suitability for any purpose.
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//
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namespace boost
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{
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namespace detail
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{
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// Avoid #including <windows.h>
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namespace win32
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{
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extern "C" __declspec(dllimport) long __stdcall InterlockedIncrement(long volatile *);
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extern "C" __declspec(dllimport) long __stdcall InterlockedDecrement(long volatile *);
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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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{
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}
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long operator++()
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{
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return win32::InterlockedIncrement(&value_);
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}
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long operator--()
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{
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return win32::InterlockedDecrement(&value_);
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}
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operator long() const
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{
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return value_;
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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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volatile 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_DETAIL_ATOMIC_COUNT_WIN32_HPP_INCLUDED
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