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