| // |
| // detail/impl/pipe_select_interrupter.ipp |
| // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| // |
| // Copyright (c) 2003-2010 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_IMPL_PIPE_SELECT_INTERRUPTER_IPP |
| #define BOOST_ASIO_DETAIL_IMPL_PIPE_SELECT_INTERRUPTER_IPP |
| |
| #if defined(_MSC_VER) && (_MSC_VER >= 1200) |
| # pragma once |
| #endif // defined(_MSC_VER) && (_MSC_VER >= 1200) |
| |
| #include <boost/asio/detail/config.hpp> |
| |
| #if !defined(BOOST_WINDOWS) |
| #if !defined(__CYGWIN__) |
| #if !defined(__SYMBIAN32__) |
| #if !defined(BOOST_ASIO_HAS_EVENTFD) |
| |
| #include <fcntl.h> |
| #include <sys/stat.h> |
| #include <sys/types.h> |
| #include <unistd.h> |
| #include <boost/asio/detail/pipe_select_interrupter.hpp> |
| #include <boost/asio/detail/throw_error.hpp> |
| #include <boost/asio/error.hpp> |
| |
| #include <boost/asio/detail/push_options.hpp> |
| |
| namespace boost { |
| namespace asio { |
| namespace detail { |
| |
| pipe_select_interrupter::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::asio::detail::throw_error(ec, "pipe_select_interrupter"); |
| } |
| } |
| |
| pipe_select_interrupter::~pipe_select_interrupter() |
| { |
| if (read_descriptor_ != -1) |
| ::close(read_descriptor_); |
| if (write_descriptor_ != -1) |
| ::close(write_descriptor_); |
| } |
| |
| void pipe_select_interrupter::interrupt() |
| { |
| char byte = 0; |
| int result = ::write(write_descriptor_, &byte, 1); |
| (void)result; |
| } |
| |
| bool pipe_select_interrupter::reset() |
| { |
| for (;;) |
| { |
| char data[1024]; |
| int 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 |
| } // namespace boost |
| |
| #include <boost/asio/detail/pop_options.hpp> |
| |
| #endif // !defined(BOOST_ASIO_HAS_EVENTFD) |
| #endif // !defined(__SYMBIAN32__) |
| #endif // !defined(__CYGWIN__) |
| #endif // !defined(BOOST_WINDOWS) |
| |
| #endif // BOOST_ASIO_DETAIL_IMPL_PIPE_SELECT_INTERRUPTER_IPP |