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Viewing changes to include/libtorrent/asio/detail/posix_event.hpp

  • Committer: Bazaar Package Importer
  • Author(s): Christophe Sauthier
  • Date: 2010-08-10 12:59:37 UTC
  • mfrom: (1.3.7 upstream)
  • Revision ID: james.westby@ubuntu.com-20100810125937-jbcmmf17y8yo9hgz
Tags: 0.15.0-0ubuntu1
* New upstream version.
* debian/patches/100_fix_html_docs.patch: refreshed.
* debian/control: bump up standards-version to 3.9.1 (no changes).

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include/libtorrent/asio/detail/posix_event.hpp
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//
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// posix_event.hpp
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// ~~~~~~~~~~~~~~~
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//
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// Copyright (c) 2003-2008 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 ASIO_DETAIL_POSIX_EVENT_HPP
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#define 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 "asio/detail/push_options.hpp"
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#include "asio/detail/push_options.hpp"
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#include <boost/config.hpp>
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#include "asio/detail/pop_options.hpp"
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#if defined(BOOST_HAS_PTHREADS)
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#include "asio/detail/push_options.hpp"
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#include <boost/assert.hpp>
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#include <boost/throw_exception.hpp>
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#include <pthread.h>
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#include "asio/detail/pop_options.hpp"
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#include "asio/error.hpp"
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#include "asio/system_error.hpp"
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#include "asio/detail/noncopyable.hpp"
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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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  posix_event()
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    : signalled_(false)
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  {
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    int error = ::pthread_cond_init(&cond_, 0);
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    if (error != 0)
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    {
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      asio::system_error e(
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          asio::error_code(error,
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            asio::error::get_system_category()),
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          "event");
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      boost::throw_exception(e);
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    }
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  }
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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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  // 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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#endif // defined(BOOST_HAS_PTHREADS)
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#include "asio/detail/pop_options.hpp"
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#endif // ASIO_DETAIL_POSIX_EVENT_HPP