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//////////////////////////////////////////////////////////////////////////////
//
// (C) Copyright Ion Gaztanaga 2006. 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)
//
// See http://www.boost.org/libs/interprocess for documentation.
//
//////////////////////////////////////////////////////////////////////////////
#include<boost/interprocess/exceptions.hpp>
#include <boost/interprocess/detail/posix_time_types_wrk.hpp>
#include <boost/interprocess/sync/scoped_lock.hpp>
namespace boost {
namespace interprocess {
inline barrier::barrier(unsigned int count)
: m_threshold(count), m_count(count), m_generation(0)
{
if (count == 0)
throw std::invalid_argument("count cannot be zero.");
}
inline barrier::~barrier(){}
inline bool barrier::wait()
{
scoped_lock<interprocess_mutex> lock(m_mutex);
unsigned int gen = m_generation;
if (--m_count == 0){
m_generation++;
m_count = m_threshold;
m_cond.notify_all();
return true;
}
while (gen == m_generation){
m_cond.wait(lock);
}
return false;
}
} //namespace interprocess {
} //namespace boost {
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