| // |
| // detail/pipe_select_interrupter.hpp |
| // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| // |
| // Copyright (c) 2003-2016 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 ASIO_DETAIL_PIPE_SELECT_INTERRUPTER_HPP |
| #define ASIO_DETAIL_PIPE_SELECT_INTERRUPTER_HPP |
| |
| #if defined(_MSC_VER) && (_MSC_VER >= 1200) |
| # pragma once |
| #endif // defined(_MSC_VER) && (_MSC_VER >= 1200) |
| |
| #include "asio/detail/config.hpp" |
| |
| #if !defined(ASIO_WINDOWS) |
| #if !defined(ASIO_WINDOWS_RUNTIME) |
| #if !defined(__CYGWIN__) |
| #if !defined(__SYMBIAN32__) |
| #if !defined(ASIO_HAS_EVENTFD) |
| |
| #include "asio/detail/push_options.hpp" |
| |
| namespace asio { |
| namespace detail { |
| |
| class pipe_select_interrupter |
| { |
| public: |
| // Constructor. |
| ASIO_DECL pipe_select_interrupter(); |
| |
| // Destructor. |
| ASIO_DECL ~pipe_select_interrupter(); |
| |
| // Recreate the interrupter's descriptors. Used after a fork. |
| ASIO_DECL void recreate(); |
| |
| // Interrupt the select call. |
| ASIO_DECL void interrupt(); |
| |
| // Reset the select interrupt. Returns true if the call was interrupted. |
| ASIO_DECL bool reset(); |
| |
| // Get the read descriptor to be passed to select. |
| int read_descriptor() const |
| { |
| return read_descriptor_; |
| } |
| |
| private: |
| // Open the descriptors. Throws on error. |
| ASIO_DECL void open_descriptors(); |
| |
| // Close the descriptors. |
| ASIO_DECL void close_descriptors(); |
| |
| // 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 |
| // byte 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 |
| // byte may be written to this to wake up the select which is waiting for the |
| // other end to become readable. |
| int write_descriptor_; |
| }; |
| |
| } // namespace detail |
| } // namespace asio |
| |
| #include "asio/detail/pop_options.hpp" |
| |
| #if defined(ASIO_HEADER_ONLY) |
| # include "asio/detail/impl/pipe_select_interrupter.ipp" |
| #endif // defined(ASIO_HEADER_ONLY) |
| |
| #endif // !defined(ASIO_HAS_EVENTFD) |
| #endif // !defined(__SYMBIAN32__) |
| #endif // !defined(__CYGWIN__) |
| #endif // !defined(ASIO_WINDOWS_RUNTIME) |
| #endif // !defined(ASIO_WINDOWS) |
| |
| #endif // ASIO_DETAIL_PIPE_SELECT_INTERRUPTER_HPP |