forked from boostorg/smart_ptr
88 lines
1.7 KiB
C++
88 lines
1.7 KiB
C++
#ifndef BOOST_SMART_PTR_DETAIL_LWM_PTHREADS_HPP_INCLUDED
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#define BOOST_SMART_PTR_DETAIL_LWM_PTHREADS_HPP_INCLUDED
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// MS compatible compilers support #pragma once
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#if defined(_MSC_VER) && (_MSC_VER >= 1020)
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# pragma once
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#endif
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//
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// boost/detail/lwm_pthreads.hpp
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//
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// Copyright (c) 2002 Peter Dimov and Multi Media Ltd.
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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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#include <boost/assert.hpp>
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#include <pthread.h>
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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 lightweight_mutex
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{
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private:
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pthread_mutex_t m_;
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lightweight_mutex(lightweight_mutex const &);
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lightweight_mutex & operator=(lightweight_mutex const &);
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public:
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lightweight_mutex()
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{
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// HPUX 10.20 / DCE has a nonstandard pthread_mutex_init
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#if defined(__hpux) && defined(_DECTHREADS_)
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BOOST_VERIFY( pthread_mutex_init( &m_, pthread_mutexattr_default ) == 0 );
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#else
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BOOST_VERIFY( pthread_mutex_init( &m_, 0 ) == 0 );
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#endif
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}
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~lightweight_mutex()
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{
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BOOST_VERIFY( pthread_mutex_destroy( &m_ ) == 0 );
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}
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class scoped_lock;
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friend class scoped_lock;
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class scoped_lock
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{
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private:
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pthread_mutex_t & m_;
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scoped_lock(scoped_lock const &);
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scoped_lock & operator=(scoped_lock const &);
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public:
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scoped_lock(lightweight_mutex & m): m_(m.m_)
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{
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BOOST_VERIFY( pthread_mutex_lock( &m_ ) == 0 );
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}
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~scoped_lock()
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{
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BOOST_VERIFY( pthread_mutex_unlock( &m_ ) == 0 );
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}
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};
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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_LWM_PTHREADS_HPP_INCLUDED
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