// Copyright (C) 2010 Vicente Botet

//

// 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)

#define BOOST_THREAD_VERSION 2

//#define BOOST_THREAD_PROVIDES_GENERIC_SHARED_MUTEX_ON_WIN

//#define BOOST_THREAD_USES_LOG

#include <boost/thread/thread_only.hpp>

#include <boost/thread/shared_mutex.hpp>

#include <boost/detail/no_exceptions_support.hpp>

//#include <boost/thread/detail/log.hpp>

boost::shared_mutex mutex;

void thread()

{

//BOOST_THREAD_LOG << "<thrd" << BOOST_THREAD_END_LOG;

BOOST_TRY

{

for (int i =0; i<10; ++i)

{

#ifndef BOOST_THREAD_USES_CHRONO

boost::system_time timeout = boost::get_system_time() + boost::posix_time::milliseconds(50);

if (mutex.timed_lock(timeout))

{

//BOOST_THREAD_LOG << "<thrd" << " i="<<i << BOOST_THREAD_END_LOG;

boost::this_thread::sleep(boost::posix_time::milliseconds(10));

mutex.unlock();

//BOOST_THREAD_LOG << "<thrd" << " i="<<i << BOOST_THREAD_END_LOG;

}

#else

boost::chrono::system_clock::time_point timeout = boost::chrono::system_clock::now() + boost::chrono::milliseconds(50);

//BOOST_THREAD_LOG << "<thrd" << " i="<<i << BOOST_THREAD_END_LOG;

if (mutex.try_lock_until(timeout))

{

//BOOST_THREAD_LOG << "<thrd" << " i="<<i << BOOST_THREAD_END_LOG;

boost::this_thread::sleep_for(boost::chrono::milliseconds(10));

mutex.unlock();

//BOOST_THREAD_LOG << "<thrd" << " i="<<i << BOOST_THREAD_END_LOG;

}

#endif

}

}

BOOST_CATCH (boost::lock_error& )

{

//BOOST_THREAD_LOG << "lock_error exception thrd>" << BOOST_THREAD_END_LOG;

}

BOOST_CATCH (...)

{

//BOOST_THREAD_LOG << "exception thrd>" << BOOST_THREAD_END_LOG;

}

BOOST_CATCH_END

//BOOST_THREAD_LOG << "thrd>" << BOOST_THREAD_END_LOG;

}

int main()

{

//BOOST_THREAD_LOG << "<main" << BOOST_THREAD_END_LOG;

const int nrThreads = 20;

boost::thread* threads[nrThreads];

for (int i = 0; i < nrThreads; ++i)

threads[i] = new boost::thread(&thread);

for (int i = 0; i < nrThreads; ++i)

{

threads[i]->join();

//BOOST_THREAD_LOG << "main" << BOOST_THREAD_END_LOG;

delete threads[i];

//BOOST_THREAD_LOG << "main" << BOOST_THREAD_END_LOG;

}

//BOOST_THREAD_LOG << "main>" << BOOST_THREAD_END_LOG;

return 0;

}