81 lines
1.9 KiB
C++
81 lines
1.9 KiB
C++
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#ifndef BOOST_THREAD_DETAIL_INTERLOCKED_READ_WIN32_HPP
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#define BOOST_THREAD_DETAIL_INTERLOCKED_READ_WIN32_HPP
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// interlocked_read_win32.hpp
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//
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// (C) Copyright 2005-8 Anthony Williams
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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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#include <boost/detail/interlocked.hpp>
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#include <boost/config/abi_prefix.hpp>
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#ifdef BOOST_MSVC
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extern "C" void _ReadWriteBarrier(void);
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#pragma intrinsic(_ReadWriteBarrier)
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namespace boost
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{
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namespace detail
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{
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inline long interlocked_read_acquire(long volatile* x)
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{
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long const res=*x;
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_ReadWriteBarrier();
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return res;
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}
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inline void* interlocked_read_acquire(void* volatile* x)
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{
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void* const res=*x;
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_ReadWriteBarrier();
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return res;
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}
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inline void interlocked_write_release(long volatile* x,long value)
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{
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_ReadWriteBarrier();
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*x=value;
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}
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inline void interlocked_write_release(void* volatile* x,void* value)
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{
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_ReadWriteBarrier();
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*x=value;
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}
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}
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}
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#else
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namespace boost
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{
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namespace detail
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{
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inline long interlocked_read_acquire(long volatile* x)
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{
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return BOOST_INTERLOCKED_COMPARE_EXCHANGE(x,0,0);
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}
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inline void* interlocked_read_acquire(void* volatile* x)
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{
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return BOOST_INTERLOCKED_COMPARE_EXCHANGE_POINTER(x,0,0);
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}
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inline void interlocked_write_release(long volatile* x,long value)
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{
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BOOST_INTERLOCKED_EXCHANGE(x,value);
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}
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inline void interlocked_write_release(void* volatile* x,void* value)
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{
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BOOST_INTERLOCKED_EXCHANGE_POINTER(x,value);
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}
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}
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}
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#endif
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#include <boost/config/abi_suffix.hpp>
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#endif
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