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100 lines
2.2 KiB
100 lines
2.2 KiB
// |
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// detail/posix_event.hpp |
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// ~~~~~~~~~~~~~~~~~~~~~~ |
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// |
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// Copyright (c) 2003-2011 Christopher M. Kohlhoff (chris at kohlhoff dot com) |
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// |
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// Distributed under the Boost Software License, Version 1.0. (See accompanying |
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) |
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// |
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#ifndef BOOST_ASIO_DETAIL_POSIX_EVENT_HPP |
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#define BOOST_ASIO_DETAIL_POSIX_EVENT_HPP |
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#if defined(_MSC_VER) && (_MSC_VER >= 1200) |
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# pragma once |
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#endif // defined(_MSC_VER) && (_MSC_VER >= 1200) |
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#include <boost/asio/detail/config.hpp> |
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#if defined(BOOST_HAS_PTHREADS) && !defined(BOOST_ASIO_DISABLE_THREADS) |
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#include <boost/assert.hpp> |
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#include <pthread.h> |
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#include <boost/asio/detail/noncopyable.hpp> |
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#include <boost/asio/detail/push_options.hpp> |
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namespace boost { |
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namespace asio { |
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namespace detail { |
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class posix_event |
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: private noncopyable |
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{ |
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public: |
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// Constructor. |
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BOOST_ASIO_DECL posix_event(); |
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// Destructor. |
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~posix_event() |
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{ |
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::pthread_cond_destroy(&cond_); |
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} |
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// Signal the event. |
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template <typename Lock> |
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void signal(Lock& lock) |
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{ |
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BOOST_ASSERT(lock.locked()); |
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(void)lock; |
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signalled_ = true; |
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::pthread_cond_signal(&cond_); // Ignore EINVAL. |
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} |
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// Signal the event and unlock the mutex. |
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template <typename Lock> |
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void signal_and_unlock(Lock& lock) |
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{ |
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BOOST_ASSERT(lock.locked()); |
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signalled_ = true; |
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lock.unlock(); |
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::pthread_cond_signal(&cond_); // Ignore EINVAL. |
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} |
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// Reset the event. |
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template <typename Lock> |
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void clear(Lock& lock) |
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{ |
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BOOST_ASSERT(lock.locked()); |
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(void)lock; |
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signalled_ = false; |
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} |
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// Wait for the event to become signalled. |
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template <typename Lock> |
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void wait(Lock& lock) |
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{ |
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BOOST_ASSERT(lock.locked()); |
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while (!signalled_) |
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::pthread_cond_wait(&cond_, &lock.mutex().mutex_); // Ignore EINVAL. |
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} |
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private: |
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::pthread_cond_t cond_; |
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bool signalled_; |
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}; |
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} // namespace detail |
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} // namespace asio |
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} // namespace boost |
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#include <boost/asio/detail/pop_options.hpp> |
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#if defined(BOOST_ASIO_HEADER_ONLY) |
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# include <boost/asio/detail/impl/posix_event.ipp> |
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#endif // defined(BOOST_ASIO_HEADER_ONLY) |
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#endif // defined(BOOST_HAS_PTHREADS) && !defined(BOOST_ASIO_DISABLE_THREADS) |
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#endif // BOOST_ASIO_DETAIL_POSIX_EVENT_HPP
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