ceph/src/boost/boost/asio/generic/stream_protocol.hpp

   1 //
   2 // generic/stream_protocol.hpp
   3 // ~~~~~~~~~~~~~~~~~~~~~~~~~~~
   4 //
   5 // Copyright (c) 2003-2019 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_GENERIC_STREAM_PROTOCOL_HPP
  12 #define BOOST_ASIO_GENERIC_STREAM_PROTOCOL_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
  20 #include <typeinfo>
  21 #include <boost/asio/basic_socket_iostream.hpp>
  22 #include <boost/asio/basic_stream_socket.hpp>
  23 #include <boost/asio/detail/socket_types.hpp>
  24 #include <boost/asio/detail/throw_exception.hpp>
  25 #include <boost/asio/generic/basic_endpoint.hpp>
  26
  27 #include <boost/asio/detail/push_options.hpp>
  28
  29 namespace boost {
  30 namespace asio {
  31 namespace generic {
  32
  33 /// Encapsulates the flags needed for a generic stream-oriented socket.
  34 /**
  35  * The boost::asio::generic::stream_protocol class contains flags necessary for
  36  * stream-oriented sockets of any address family and protocol.
  37  *
  38  * @par Examples
  39  * Constructing using a native address family and socket protocol:
  40  * @code stream_protocol p(AF_INET, IPPROTO_TCP); @endcode
  41  * Constructing from a specific protocol type:
  42  * @code stream_protocol p(boost::asio::ip::tcp::v4()); @endcode
  43  *
  44  * @par Thread Safety
  45  * @e Distinct @e objects: Safe.@n
  46  * @e Shared @e objects: Safe.
  47  *
  48  * @par Concepts:
  49  * Protocol.
  50  */
  51 class stream_protocol
  52 {
  53 public:
  54   /// Construct a protocol object for a specific address family and protocol.
  55   stream_protocol(int address_family, int socket_protocol)
  56     : family_(address_family),
  57       protocol_(socket_protocol)
  58   {
  59   }
  60
  61   /// Construct a generic protocol object from a specific protocol.
  62   /**
  63    * @throws @c bad_cast Thrown if the source protocol is not stream-oriented.
  64    */
  65   template <typename Protocol>
  66   stream_protocol(const Protocol& source_protocol)
  67     : family_(source_protocol.family()),
  68       protocol_(source_protocol.protocol())
  69   {
  70     if (source_protocol.type() != type())
  71     {
  72       std::bad_cast ex;
  73       boost::asio::detail::throw_exception(ex);
  74     }
  75   }
  76
  77   /// Obtain an identifier for the type of the protocol.
  78   int type() const BOOST_ASIO_NOEXCEPT
  79   {
  80     return BOOST_ASIO_OS_DEF(SOCK_STREAM);
  81   }
  82
  83   /// Obtain an identifier for the protocol.
  84   int protocol() const BOOST_ASIO_NOEXCEPT
  85   {
  86     return protocol_;
  87   }
  88
  89   /// Obtain an identifier for the protocol family.
  90   int family() const BOOST_ASIO_NOEXCEPT
  91   {
  92     return family_;
  93   }
  94
  95   /// Compare two protocols for equality.
  96   friend bool operator==(const stream_protocol& p1, const stream_protocol& p2)
  97   {
  98     return p1.family_ == p2.family_ && p1.protocol_ == p2.protocol_;
  99   }
 100
 101   /// Compare two protocols for inequality.
 102   friend bool operator!=(const stream_protocol& p1, const stream_protocol& p2)
 103   {
 104     return !(p1 == p2);
 105   }
 106
 107   /// The type of an endpoint.
 108   typedef basic_endpoint<stream_protocol> endpoint;
 109
 110   /// The generic socket type.
 111   typedef basic_stream_socket<stream_protocol> socket;
 112
 113 #if !defined(BOOST_ASIO_NO_IOSTREAM)
 114   /// The generic socket iostream type.
 115   typedef basic_socket_iostream<stream_protocol> iostream;
 116 #endif // !defined(BOOST_ASIO_NO_IOSTREAM)
 117
 118 private:
 119   int family_;
 120   int protocol_;
 121 };
 122
 123 } // namespace generic
 124 } // namespace asio
 125 } // namespace boost
 126
 127 #include <boost/asio/detail/pop_options.hpp>
 128
 129 #endif // BOOST_ASIO_GENERIC_STREAM_PROTOCOL_HPP