| ////////////////////////////////////////////////////////////////////////////// | |
| // | |
| // (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 { |