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Diffstat (limited to 'boost/interprocess/sync/spin/interprocess_barrier.hpp')
-rw-r--r-- | boost/interprocess/sync/spin/interprocess_barrier.hpp | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/boost/interprocess/sync/spin/interprocess_barrier.hpp b/boost/interprocess/sync/spin/interprocess_barrier.hpp new file mode 100644 index 0000000000..f8ee09948d --- /dev/null +++ b/boost/interprocess/sync/spin/interprocess_barrier.hpp @@ -0,0 +1,46 @@ +////////////////////////////////////////////////////////////////////////////// +// +// (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 { |