| // |
| // detail/posix_event.hpp |
| // ~~~~~~~~~~~~~~~~~~~~~~ |
| // |
| // Copyright (c) 2003-2010 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 |