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Diffstat (limited to '3rdParty/Boost/src/boost/asio/detail/pipe_select_interrupter.hpp')
-rw-r--r--3rdParty/Boost/src/boost/asio/detail/pipe_select_interrupter.hpp117
1 files changed, 117 insertions, 0 deletions
diff --git a/3rdParty/Boost/src/boost/asio/detail/pipe_select_interrupter.hpp b/3rdParty/Boost/src/boost/asio/detail/pipe_select_interrupter.hpp
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+++ b/3rdParty/Boost/src/boost/asio/detail/pipe_select_interrupter.hpp
@@ -0,0 +1,117 @@
+//
+// pipe_select_interrupter.hpp
+// ~~~~~~~~~~~~~~~~~~~~~~~~~~~
+//
+// Copyright (c) 2003-2008 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 BOOST_ASIO_DETAIL_PIPE_SELECT_INTERRUPTER_HPP
+#define BOOST_ASIO_DETAIL_PIPE_SELECT_INTERRUPTER_HPP
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1200)
+# pragma once
+#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
+
+#include <boost/asio/detail/push_options.hpp>
+
+#include <boost/asio/detail/push_options.hpp>
+#include <boost/config.hpp>
+#include <boost/throw_exception.hpp>
+#include <boost/system/system_error.hpp>
+#include <boost/asio/detail/pop_options.hpp>
+
+#if !defined(BOOST_WINDOWS) && !defined(__CYGWIN__)
+
+#include <boost/asio/detail/push_options.hpp>
+#include <fcntl.h>
+#include <boost/asio/detail/pop_options.hpp>
+
+#include <boost/asio/error.hpp>
+#include <boost/asio/detail/socket_types.hpp>
+
+namespace boost {
+namespace asio {
+namespace detail {
+
+class pipe_select_interrupter
+{
+public:
+ // Constructor.
+ pipe_select_interrupter()
+ {
+ int pipe_fds[2];
+ if (pipe(pipe_fds) == 0)
+ {
+ read_descriptor_ = pipe_fds[0];
+ ::fcntl(read_descriptor_, F_SETFL, O_NONBLOCK);
+ write_descriptor_ = pipe_fds[1];
+ ::fcntl(write_descriptor_, F_SETFL, O_NONBLOCK);
+ }
+ else
+ {
+ boost::system::error_code ec(errno,
+ boost::asio::error::get_system_category());
+ boost::system::system_error e(ec, "pipe_select_interrupter");
+ boost::throw_exception(e);
+ }
+ }
+
+ // Destructor.
+ ~pipe_select_interrupter()
+ {
+ if (read_descriptor_ != -1)
+ ::close(read_descriptor_);
+ if (write_descriptor_ != -1)
+ ::close(write_descriptor_);
+ }
+
+ // Interrupt the select call.
+ void interrupt()
+ {
+ char byte = 0;
+ int result = ::write(write_descriptor_, &byte, 1);
+ (void)result;
+ }
+
+ // Reset the select interrupt. Returns true if the call was interrupted.
+ bool reset()
+ {
+ char data[1024];
+ int bytes_read = ::read(read_descriptor_, data, sizeof(data));
+ bool was_interrupted = (bytes_read > 0);
+ while (bytes_read == sizeof(data))
+ bytes_read = ::read(read_descriptor_, data, sizeof(data));
+ return was_interrupted;
+ }
+
+ // 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
+ // 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
+} // namespace boost
+
+#endif // !defined(BOOST_WINDOWS) && !defined(__CYGWIN__)
+
+#include <boost/asio/detail/pop_options.hpp>
+
+#endif // BOOST_ASIO_DETAIL_PIPE_SELECT_INTERRUPTER_HPP