ceph/src/boost/boost/asio/detail/socket_holder.hpp

   1 //
   2 // detail/socket_holder.hpp
   3 // ~~~~~~~~~~~~~~~~~~~~~~~~
   4 //
   5 // Copyright (c) 2003-2017 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(socket_, state, 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(socket_, state, 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