// // 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