| // |
| // descriptor_ops.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_DESCRIPTOR_OPS_HPP |
| #define BOOST_ASIO_DETAIL_DESCRIPTOR_OPS_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 <cerrno> |
| #include <boost/asio/detail/pop_options.hpp> |
| |
| #include <boost/asio/error.hpp> |
| #include <boost/asio/detail/socket_types.hpp> |
| |
| #if !defined(BOOST_WINDOWS) && !defined(__CYGWIN__) |
| |
| namespace boost { |
| namespace asio { |
| namespace detail { |
| namespace descriptor_ops { |
| |
| inline void clear_error(boost::system::error_code& ec) |
| { |
| errno = 0; |
| ec = boost::system::error_code(); |
| } |
| |
| template <typename ReturnType> |
| inline ReturnType error_wrapper(ReturnType return_value, |
| boost::system::error_code& ec) |
| { |
| ec = boost::system::error_code(errno, |
| boost::asio::error::get_system_category()); |
| return return_value; |
| } |
| |
| inline int open(const char* path, int flags, boost::system::error_code& ec) |
| { |
| clear_error(ec); |
| int result = error_wrapper(::open(path, flags), ec); |
| if (result >= 0) |
| clear_error(ec); |
| return result; |
| } |
| |
| inline int close(int d, boost::system::error_code& ec) |
| { |
| clear_error(ec); |
| int result = error_wrapper(::close(d), ec); |
| if (result == 0) |
| clear_error(ec); |
| return result; |
| } |
| |
| inline void init_buf_iov_base(void*& base, void* addr) |
| { |
| base = addr; |
| } |
| |
| template <typename T> |
| inline void init_buf_iov_base(T& base, void* addr) |
| { |
| base = static_cast<T>(addr); |
| } |
| |
| typedef iovec buf; |
| |
| inline void init_buf(buf& b, void* data, size_t size) |
| { |
| init_buf_iov_base(b.iov_base, data); |
| b.iov_len = size; |
| } |
| |
| inline void init_buf(buf& b, const void* data, size_t size) |
| { |
| init_buf_iov_base(b.iov_base, const_cast<void*>(data)); |
| b.iov_len = size; |
| } |
| |
| inline int scatter_read(int d, buf* bufs, size_t count, |
| boost::system::error_code& ec) |
| { |
| clear_error(ec); |
| int result = error_wrapper(::readv(d, bufs, static_cast<int>(count)), ec); |
| if (result >= 0) |
| clear_error(ec); |
| return result; |
| } |
| |
| inline int gather_write(int d, const buf* bufs, size_t count, |
| boost::system::error_code& ec) |
| { |
| clear_error(ec); |
| int result = error_wrapper(::writev(d, bufs, static_cast<int>(count)), ec); |
| if (result >= 0) |
| clear_error(ec); |
| return result; |
| } |
| |
| inline int ioctl(int d, long cmd, ioctl_arg_type* arg, |
| boost::system::error_code& ec) |
| { |
| clear_error(ec); |
| int result = error_wrapper(::ioctl(d, cmd, arg), ec); |
| if (result >= 0) |
| clear_error(ec); |
| return result; |
| } |
| |
| inline int fcntl(int d, long cmd, boost::system::error_code& ec) |
| { |
| clear_error(ec); |
| int result = error_wrapper(::fcntl(d, cmd), ec); |
| if (result != -1) |
| clear_error(ec); |
| return result; |
| } |
| |
| inline int fcntl(int d, long cmd, long arg, boost::system::error_code& ec) |
| { |
| clear_error(ec); |
| int result = error_wrapper(::fcntl(d, cmd, arg), ec); |
| if (result != -1) |
| clear_error(ec); |
| return result; |
| } |
| |
| inline int poll_read(int d, boost::system::error_code& ec) |
| { |
| clear_error(ec); |
| pollfd fds; |
| fds.fd = d; |
| fds.events = POLLIN; |
| fds.revents = 0; |
| clear_error(ec); |
| int result = error_wrapper(::poll(&fds, 1, -1), ec); |
| if (result >= 0) |
| clear_error(ec); |
| return result; |
| } |
| |
| inline int poll_write(int d, boost::system::error_code& ec) |
| { |
| clear_error(ec); |
| pollfd fds; |
| fds.fd = d; |
| fds.events = POLLOUT; |
| fds.revents = 0; |
| clear_error(ec); |
| int result = error_wrapper(::poll(&fds, 1, -1), ec); |
| if (result >= 0) |
| clear_error(ec); |
| return result; |
| } |
| |
| } // namespace descriptor_ops |
| } // namespace detail |
| } // namespace asio |
| } // namespace boost |
| |
| #endif // !defined(BOOST_WINDOWS) && !defined(__CYGWIN__) |
| |
| #include <boost/asio/detail/pop_options.hpp> |
| |
| #endif // BOOST_ASIO_DETAIL_DESCRIPTOR_OPS_HPP |