/usr/include/asio/detail/pipe_select_interrupter.hpp is in libasio-dev 1.4.1-3ubuntu2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 | //
// 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 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/push_options.hpp"
#include "asio/detail/push_options.hpp"
#include <boost/config.hpp>
#include <boost/throw_exception.hpp>
#include "asio/detail/pop_options.hpp"
#if !defined(BOOST_WINDOWS) && !defined(__CYGWIN__)
#include "asio/detail/push_options.hpp"
#include <fcntl.h>
#include "asio/detail/pop_options.hpp"
#include "asio/error.hpp"
#include "asio/system_error.hpp"
#include "asio/detail/socket_types.hpp"
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
{
asio::error_code ec(errno,
asio::error::get_system_category());
asio::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
#endif // !defined(BOOST_WINDOWS) && !defined(__CYGWIN__)
#include "asio/detail/pop_options.hpp"
#endif // ASIO_DETAIL_PIPE_SELECT_INTERRUPTER_HPP
|