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+//
+// detail/pipe_select_interrupter.hpp
+// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+//
+// Copyright (c) 2003-2024 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 interrupter. Returns true if the reset was successful.
+ 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