request_queue_impl_worker.cpp

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/***************************************************************************
 * lib/io/request_queue_impl_worker.cpp
 *
 * Part of the STXXL. See http://stxxl.sourceforge.net
 *
 * Copyright (C) 2002-2005 Roman Dementiev <[email protected]>
 * Copyright (C) 2008, 2009 Andreas Beckmann <[email protected]>
 * Copyright (C) 2009 Johannes Singler <[email protected]>
 * Copyright (C) 2013 Timo Bingmann <[email protected]>
 *
 * Distributed under the Boost Software License, Version 1.0.
 * (See accompanying file LICENSE_1_0.txt or copy at
 * http://www.boost.org/LICENSE_1_0.txt)
 **************************************************************************/

#include <stxxl/bits/common/error_handling.h>
#include <stxxl/bits/common/semaphore.h>
#include <stxxl/bits/common/state.h>
#include <stxxl/bits/config.h>
#include <stxxl/bits/io/request_queue_impl_worker.h>
#include <stxxl/bits/namespace.h>

#include <cassert>
#include <cstddef>

#if STXXL_BOOST_THREADS
 #include <boost/bind.hpp>
#endif
#if STXXL_STD_THREADS && STXXL_MSVC >= 1700
 #include <windows.h>
#endif

STXXL_BEGIN_NAMESPACE

void request_queue_impl_worker::start_thread(void* (*worker)(void*), void* arg, thread_type& t, state<thread_state>& s)
{
 assert(s() == NOT_RUNNING);
#if STXXL_STD_THREADS
 t = new std::thread(worker, arg);
#elif STXXL_BOOST_THREADS
 t = new boost::thread(boost::bind(worker, arg));
#else
 STXXL_CHECK_PTHREAD_CALL(pthread_create(&t, NULL, worker, arg));
#endif
 s.set_to(RUNNING);
}

void request_queue_impl_worker::stop_thread(thread_type& t, state<thread_state>& s, semaphore& sem)
{
 assert(s() == RUNNING);
 s.set_to(TERMINATING);
 sem++;
#if STXXL_STD_THREADS
#if STXXL_MSVC >= 1700
 // In the Visual C++ Runtime 2012 and 2013, there is a deadlock bug, which
 // occurs when threads are joined after main() exits. Apparently, Microsoft
 // thinks this is not a big issue. It has not been fixed in VC++RT 2013.
 // https://connect.microsoft.com/VisualStudio/feedback/details/747145
 //
 // All STXXL threads are created by singletons, which are global variables
 // that are deleted after main() exits. The fix applied here it to use
 // std::thread::native_handle() and access the WINAPI to terminate the
 // thread directly (after it finished handling its i/o requests).

 WaitForSingleObject(t->native_handle(), INFINITE);
 CloseHandle(t->native_handle());
#else
 t->join();
 delete t;
#endif
 t = NULL;
#elif STXXL_BOOST_THREADS
 t->join();
 delete t;
 t = NULL;
#else
 STXXL_CHECK_PTHREAD_CALL(pthread_join(t, NULL));
#endif
 assert(s() == TERMINATED);
 s.set_to(NOT_RUNNING);
}

STXXL_END_NAMESPACE
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