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authorMatthias P. Braendli <matthias.braendli@mpb.li>2018-08-06 10:35:22 +0200
committerMatthias P. Braendli <matthias.braendli@mpb.li>2018-08-06 10:35:22 +0200
commite95946831f8ef53d29590735a2df661385edb008 (patch)
treee179b6beed4a5a0dd108f078a529ae9f8107ed8e /lib/asio/detail/impl/pipe_select_interrupter.ipp
parent8bc01ff60629d9096f4b57cfb574ace672a6ef0e (diff)
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Replace boost by the standalone asio library
Diffstat (limited to 'lib/asio/detail/impl/pipe_select_interrupter.ipp')
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1 files changed, 124 insertions, 0 deletions
diff --git a/lib/asio/detail/impl/pipe_select_interrupter.ipp b/lib/asio/detail/impl/pipe_select_interrupter.ipp
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+//
+// detail/impl/pipe_select_interrupter.ipp
+// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+//
+// Copyright (c) 2003-2018 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_IMPL_PIPE_SELECT_INTERRUPTER_IPP
+#define ASIO_DETAIL_IMPL_PIPE_SELECT_INTERRUPTER_IPP
+
+#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_RUNTIME)
+#if !defined(ASIO_WINDOWS)
+#if !defined(__CYGWIN__)
+#if !defined(__SYMBIAN32__)
+#if !defined(ASIO_HAS_EVENTFD)
+
+#include <fcntl.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+#include "asio/detail/pipe_select_interrupter.hpp"
+#include "asio/detail/socket_types.hpp"
+#include "asio/detail/throw_error.hpp"
+#include "asio/error.hpp"
+
+#include "asio/detail/push_options.hpp"
+
+namespace asio {
+namespace detail {
+
+pipe_select_interrupter::pipe_select_interrupter()
+{
+ open_descriptors();
+}
+
+void pipe_select_interrupter::open_descriptors()
+{
+ 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);
+
+#if defined(FD_CLOEXEC)
+ ::fcntl(read_descriptor_, F_SETFD, FD_CLOEXEC);
+ ::fcntl(write_descriptor_, F_SETFD, FD_CLOEXEC);
+#endif // defined(FD_CLOEXEC)
+ }
+ else
+ {
+ asio::error_code ec(errno,
+ asio::error::get_system_category());
+ asio::detail::throw_error(ec, "pipe_select_interrupter");
+ }
+}
+
+pipe_select_interrupter::~pipe_select_interrupter()
+{
+ close_descriptors();
+}
+
+void pipe_select_interrupter::close_descriptors()
+{
+ if (read_descriptor_ != -1)
+ ::close(read_descriptor_);
+ if (write_descriptor_ != -1)
+ ::close(write_descriptor_);
+}
+
+void pipe_select_interrupter::recreate()
+{
+ close_descriptors();
+
+ write_descriptor_ = -1;
+ read_descriptor_ = -1;
+
+ open_descriptors();
+}
+
+void pipe_select_interrupter::interrupt()
+{
+ char byte = 0;
+ signed_size_type result = ::write(write_descriptor_, &byte, 1);
+ (void)result;
+}
+
+bool pipe_select_interrupter::reset()
+{
+ for (;;)
+ {
+ char data[1024];
+ signed_size_type bytes_read = ::read(read_descriptor_, data, sizeof(data));
+ if (bytes_read < 0 && errno == EINTR)
+ continue;
+ bool was_interrupted = (bytes_read > 0);
+ while (bytes_read == sizeof(data))
+ bytes_read = ::read(read_descriptor_, data, sizeof(data));
+ return was_interrupted;
+ }
+}
+
+} // namespace detail
+} // namespace asio
+
+#include "asio/detail/pop_options.hpp"
+
+#endif // !defined(ASIO_HAS_EVENTFD)
+#endif // !defined(__SYMBIAN32__)
+#endif // !defined(__CYGWIN__)
+#endif // !defined(ASIO_WINDOWS)
+#endif // !defined(ASIO_WINDOWS_RUNTIME)
+
+#endif // ASIO_DETAIL_IMPL_PIPE_SELECT_INTERRUPTER_IPP