| 1 | // |
|---|---|
| 2 | // detail/socket_holder.hpp |
| 3 | // ~~~~~~~~~~~~~~~~~~~~~~~~ |
| 4 | // |
| 5 | // Copyright (c) 2003-2015 Christopher M. Kohlhoff (chris at kohlhoff dot com) |
| 6 | // |
| 7 | // Distributed under the Boost Software License, Version 1.0. (See accompanying |
| 8 | // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) |
| 9 | // |
| 10 | |
| 11 | #ifndef BOOST_ASIO_DETAIL_SOCKET_HOLDER_HPP |
| 12 | #define BOOST_ASIO_DETAIL_SOCKET_HOLDER_HPP |
| 13 | |
| 14 | #if defined(_MSC_VER) && (_MSC_VER >= 1200) |
| 15 | # pragma once |
| 16 | #endif // defined(_MSC_VER) && (_MSC_VER >= 1200) |
| 17 | |
| 18 | #include <boost/asio/detail/config.hpp> |
| 19 | #include <boost/asio/detail/noncopyable.hpp> |
| 20 | #include <boost/asio/detail/socket_ops.hpp> |
| 21 | |
| 22 | #include <boost/asio/detail/push_options.hpp> |
| 23 | |
| 24 | namespace boost { |
| 25 | namespace asio { |
| 26 | namespace detail { |
| 27 | |
| 28 | // Implement the resource acquisition is initialisation idiom for sockets. |
| 29 | class socket_holder |
| 30 | : private noncopyable |
| 31 | { |
| 32 | public: |
| 33 | // Construct as an uninitialised socket. |
| 34 | socket_holder() |
| 35 | : socket_(invalid_socket) |
| 36 | { |
| 37 | } |
| 38 | |
| 39 | // Construct to take ownership of the specified socket. |
| 40 | explicit socket_holder(socket_type s) |
| 41 | : socket_(s) |
| 42 | { |
| 43 | } |
| 44 | |
| 45 | // Destructor. |
| 46 | ~socket_holder() |
| 47 | { |
| 48 | if (socket_ != invalid_socket) |
| 49 | { |
| 50 | boost::system::error_code ec; |
| 51 | socket_ops::state_type state = 0; |
| 52 | socket_ops::close(s: socket_, state, destruction: true, ec); |
| 53 | } |
| 54 | } |
| 55 | |
| 56 | // Get the underlying socket. |
| 57 | socket_type get() const |
| 58 | { |
| 59 | return socket_; |
| 60 | } |
| 61 | |
| 62 | // Reset to an uninitialised socket. |
| 63 | void reset() |
| 64 | { |
| 65 | if (socket_ != invalid_socket) |
| 66 | { |
| 67 | boost::system::error_code ec; |
| 68 | socket_ops::state_type state = 0; |
| 69 | socket_ops::close(s: socket_, state, destruction: true, ec); |
| 70 | socket_ = invalid_socket; |
| 71 | } |
| 72 | } |
| 73 | |
| 74 | // Reset to take ownership of the specified socket. |
| 75 | void reset(socket_type s) |
| 76 | { |
| 77 | reset(); |
| 78 | socket_ = s; |
| 79 | } |
| 80 | |
| 81 | // Release ownership of the socket. |
| 82 | socket_type release() |
| 83 | { |
| 84 | socket_type tmp = socket_; |
| 85 | socket_ = invalid_socket; |
| 86 | return tmp; |
| 87 | } |
| 88 | |
| 89 | private: |
| 90 | // The underlying socket. |
| 91 | socket_type socket_; |
| 92 | }; |
| 93 | |
| 94 | } // namespace detail |
| 95 | } // namespace asio |
| 96 | } // namespace boost |
| 97 | |
| 98 | #include <boost/asio/detail/pop_options.hpp> |
| 99 | |
| 100 | #endif // BOOST_ASIO_DETAIL_SOCKET_HOLDER_HPP |
| 101 |