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