projects / ceph.git / blame
| Commit | Line | Data |
|---|---|---|
| 7c673cae FG |
1 | // |
| 2 | // detail/pipe_select_interrupter.hpp | |
| 3 | // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
| 4 | // | |
| 5 | // Copyright (c) 2003-2016 Christopher M. Kohlhoff (chris at kohlhoff dot com) | |
| 6 | // | |
| 7 | // Distributed under the Boost Software License, Version 1.0. (See accompanying | |
| 8 | // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) | |
| 9 | // | |
| 10 | ||
| 11 | #ifndef BOOST_ASIO_DETAIL_PIPE_SELECT_INTERRUPTER_HPP | |
| 12 | #define BOOST_ASIO_DETAIL_PIPE_SELECT_INTERRUPTER_HPP | |
| 13 | ||
| 14 | #if defined(_MSC_VER) && (_MSC_VER >= 1200) | |
| 15 | # pragma once | |
| 16 | #endif // defined(_MSC_VER) && (_MSC_VER >= 1200) | |
| 17 | ||
| 18 | #include <boost/asio/detail/config.hpp> | |
| 19 | ||
| 20 | #if !defined(BOOST_ASIO_WINDOWS) | |
| 21 | #if !defined(BOOST_ASIO_WINDOWS_RUNTIME) | |
| 22 | #if !defined(__CYGWIN__) | |
| 23 | #if !defined(__SYMBIAN32__) | |
| 24 | #if !defined(BOOST_ASIO_HAS_EVENTFD) | |
| 25 | ||
| 26 | #include <boost/asio/detail/push_options.hpp> | |
| 27 | ||
| 28 | namespace boost { | |
| 29 | namespace asio { | |
| 30 | namespace detail { | |
| 31 | ||
| 32 | class pipe_select_interrupter | |
| 33 | { | |
| 34 | public: | |
| 35 | // Constructor. | |
| 36 | BOOST_ASIO_DECL pipe_select_interrupter(); | |
| 37 | ||
| 38 | // Destructor. | |
| 39 | BOOST_ASIO_DECL ~pipe_select_interrupter(); | |
| 40 | ||
| 41 | // Recreate the interrupter's descriptors. Used after a fork. | |
| 42 | BOOST_ASIO_DECL void recreate(); | |
| 43 | ||
| 44 | // Interrupt the select call. | |
| 45 | BOOST_ASIO_DECL void interrupt(); | |
| 46 | ||
| 47 | // Reset the select interrupt. Returns true if the call was interrupted. | |
| 48 | BOOST_ASIO_DECL bool reset(); | |
| 49 | ||
| 50 | // Get the read descriptor to be passed to select. | |
| 51 | int read_descriptor() const | |
| 52 | { | |
| 53 | return read_descriptor_; | |
| 54 | } | |
| 55 | ||
| 56 | private: | |
| 57 | // Open the descriptors. Throws on error. | |
| 58 | BOOST_ASIO_DECL void open_descriptors(); | |
| 59 | ||
| 60 | // Close the descriptors. | |
| 61 | BOOST_ASIO_DECL void close_descriptors(); | |
| 62 | ||
| 63 | // The read end of a connection used to interrupt the select call. This file | |
| 64 | // descriptor is passed to select such that when it is time to stop, a single | |
| 65 | // byte will be written on the other end of the connection and this | |
| 66 | // descriptor will become readable. | |
| 67 | int read_descriptor_; | |
| 68 | ||
| 69 | // The write end of a connection used to interrupt the select call. A single | |
| 70 | // byte may be written to this to wake up the select which is waiting for the | |
| 71 | // other end to become readable. | |
| 72 | int write_descriptor_; | |
| 73 | }; | |
| 74 | ||
| 75 | } // namespace detail | |
| 76 | } // namespace asio | |
| 77 | } // namespace boost | |
| 78 | ||
| 79 | #include <boost/asio/detail/pop_options.hpp> | |
| 80 | ||
| 81 | #if defined(BOOST_ASIO_HEADER_ONLY) | |
| 82 | # include <boost/asio/detail/impl/pipe_select_interrupter.ipp> | |
| 83 | #endif // defined(BOOST_ASIO_HEADER_ONLY) | |
| 84 | ||
| 85 | #endif // !defined(BOOST_ASIO_HAS_EVENTFD) | |
| 86 | #endif // !defined(__SYMBIAN32__) | |
| 87 | #endif // !defined(__CYGWIN__) | |
| 88 | #endif // !defined(BOOST_ASIO_WINDOWS_RUNTIME) | |
| 89 | #endif // !defined(BOOST_ASIO_WINDOWS) | |
| 90 | ||
| 91 | #endif // BOOST_ASIO_DETAIL_PIPE_SELECT_INTERRUPTER_HPP |