// | |
// detail/eventfd_select_interrupter.hpp | |
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
// | |
// Copyright (c) 2003-2011 Christopher M. Kohlhoff (chris at kohlhoff dot com) | |
// Copyright (c) 2008 Roelof Naude (roelof.naude at gmail 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_EVENTFD_SELECT_INTERRUPTER_HPP | |
#define BOOST_ASIO_DETAIL_EVENTFD_SELECT_INTERRUPTER_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_ASIO_HAS_EVENTFD) | |
#include <boost/asio/detail/push_options.hpp> | |
namespace boost { | |
namespace asio { | |
namespace detail { | |
class eventfd_select_interrupter | |
{ | |
public: | |
// Constructor. | |
BOOST_ASIO_DECL eventfd_select_interrupter(); | |
// Destructor. | |
BOOST_ASIO_DECL ~eventfd_select_interrupter(); | |
// Interrupt the select call. | |
BOOST_ASIO_DECL void interrupt(); | |
// Reset the select interrupt. Returns true if the call was interrupted. | |
BOOST_ASIO_DECL bool reset(); | |
// Get the read descriptor to be passed to select. | |
int read_descriptor() const | |
{ | |
return read_descriptor_; | |
} | |
private: | |
// The read end of a connection used to interrupt the select call. This file | |
// descriptor is passed to select such that when it is time to stop, a single | |
// 64bit value will be written on the other end of the connection and this | |
// descriptor will become readable. | |
int read_descriptor_; | |
// The write end of a connection used to interrupt the select call. A single | |
// 64bit non-zero value may be written to this to wake up the select which is | |
// waiting for the other end to become readable. This descriptor will only | |
// differ from the read descriptor when a pipe is used. | |
int write_descriptor_; | |
}; | |
} // namespace detail | |
} // namespace asio | |
} // namespace boost | |
#include <boost/asio/detail/pop_options.hpp> | |
#if defined(BOOST_ASIO_HEADER_ONLY) | |
# include <boost/asio/detail/impl/eventfd_select_interrupter.ipp> | |
#endif // defined(BOOST_ASIO_HEADER_ONLY) | |
#endif // defined(BOOST_ASIO_HAS_EVENTFD) | |
#endif // BOOST_ASIO_DETAIL_EVENTFD_SELECT_INTERRUPTER_HPP |