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136 lines
2.5 KiB
C++
136 lines
2.5 KiB
C++
#ifndef BOOST_DETAIL_LIGHTWEIGHT_THREAD_HPP_INCLUDED
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#define BOOST_DETAIL_LIGHTWEIGHT_THREAD_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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// boost/detail/lightweight_thread.hpp
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//
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// Copyright (c) 2002 Peter Dimov and Multi Media Ltd.
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// Copyright (c) 2008 Peter Dimov
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//
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// Distributed under the Boost Software License, Version 1.0.
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// See 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/config.hpp>
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#include <memory>
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#include <cerrno>
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// pthread_create, pthread_join
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#if defined( BOOST_HAS_PTHREADS )
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#include <pthread.h>
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#else
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#include <windows.h>
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#include <process.h>
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typedef HANDLE pthread_t;
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int pthread_create( pthread_t * thread, void const *, unsigned (__stdcall * start_routine) (void*), void* arg )
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{
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HANDLE h = (HANDLE)_beginthreadex( 0, 0, start_routine, arg, 0, 0 );
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if( h != 0 )
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{
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*thread = h;
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return 0;
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}
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else
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{
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return EAGAIN;
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}
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}
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int pthread_join( pthread_t thread, void ** /*value_ptr*/ )
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{
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::WaitForSingleObject( thread, INFINITE );
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::CloseHandle( thread );
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return 0;
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}
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#endif
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// template<class F> int lw_thread_create( pthread_t & pt, F f );
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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 lw_abstract_thread
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{
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public:
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virtual ~lw_abstract_thread() {}
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virtual void run() = 0;
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};
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#if defined( BOOST_HAS_PTHREADS )
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extern "C" void * lw_thread_routine( void * pv )
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{
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std::auto_ptr<lw_abstract_thread> pt( static_cast<lw_abstract_thread *>( pv ) );
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pt->run();
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return 0;
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}
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#else
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unsigned __stdcall lw_thread_routine( void * pv )
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{
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std::auto_ptr<lw_abstract_thread> pt( static_cast<lw_abstract_thread *>( pv ) );
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pt->run();
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return 0;
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}
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#endif
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template<class F> class lw_thread_impl: public lw_abstract_thread
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{
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public:
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explicit lw_thread_impl( F f ): f_( f )
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{
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}
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void run()
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{
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f_();
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}
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private:
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F f_;
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};
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template<class F> int lw_thread_create( pthread_t & pt, F f )
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{
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std::auto_ptr<lw_abstract_thread> p( new lw_thread_impl<F>( f ) );
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int r = pthread_create( &pt, 0, lw_thread_routine, p.get() );
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if( r == 0 )
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{
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p.release();
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}
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return r;
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}
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} // namespace detail
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} // namespace boost
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#endif // #ifndef BOOST_DETAIL_LIGHTWEIGHT_THREAD_HPP_INCLUDED
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