ceph/src/boost/libs/asio/include/boost/asio/basic_socket_iostream.hpp

   1 //
   2 // basic_socket_iostream.hpp
   3 // ~~~~~~~~~~~~~~~~~~~~~~~~~
   4 //
   5 // Copyright (c) 2003-2016 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_BASIC_SOCKET_IOSTREAM_HPP
  12 #define BOOST_ASIO_BASIC_SOCKET_IOSTREAM_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 #if !defined(BOOST_ASIO_NO_IOSTREAM)
  21
  22 #include <istream>
  23 #include <ostream>
  24 #include <boost/asio/basic_socket_streambuf.hpp>
  25 #include <boost/asio/stream_socket_service.hpp>
  26
  27 #if !defined(BOOST_ASIO_HAS_VARIADIC_TEMPLATES)
  28
  29 # include <boost/asio/detail/variadic_templates.hpp>
  30
  31 // A macro that should expand to:
  32 //   template <typename T1, ..., typename Tn>
  33 //   explicit basic_socket_iostream(T1 x1, ..., Tn xn)
  34 //     : std::basic_iostream<char>(
  35 //         &this->detail::socket_iostream_base<
  36 //           Protocol, StreamSocketService, Time,
  37 //           TimeTraits, TimerService>::streambuf_)
  38 //   {
  39 //     if (rdbuf()->connect(x1, ..., xn) == 0)
  40 //       this->setstate(std::ios_base::failbit);
  41 //   }
  42 // This macro should only persist within this file.
  43
  44 # define BOOST_ASIO_PRIVATE_CTR_DEF(n) \
  45   template <BOOST_ASIO_VARIADIC_TPARAMS(n)> \
  46   explicit basic_socket_iostream(BOOST_ASIO_VARIADIC_PARAMS(n)) \
  47     : std::basic_iostream<char>( \
  48         &this->detail::socket_iostream_base< \
  49           Protocol, StreamSocketService, Time, \
  50           TimeTraits, TimerService>::streambuf_) \
  51   { \
  52     this->setf(std::ios_base::unitbuf); \
  53     if (rdbuf()->connect(BOOST_ASIO_VARIADIC_ARGS(n)) == 0) \
  54       this->setstate(std::ios_base::failbit); \
  55   } \
  56   /**/
  57
  58 // A macro that should expand to:
  59 //   template <typename T1, ..., typename Tn>
  60 //   void connect(T1 x1, ..., Tn xn)
  61 //   {
  62 //     if (rdbuf()->connect(x1, ..., xn) == 0)
  63 //       this->setstate(std::ios_base::failbit);
  64 //   }
  65 // This macro should only persist within this file.
  66
  67 # define BOOST_ASIO_PRIVATE_CONNECT_DEF(n) \
  68   template <BOOST_ASIO_VARIADIC_TPARAMS(n)> \
  69   void connect(BOOST_ASIO_VARIADIC_PARAMS(n)) \
  70   { \
  71     if (rdbuf()->connect(BOOST_ASIO_VARIADIC_ARGS(n)) == 0) \
  72       this->setstate(std::ios_base::failbit); \
  73   } \
  74   /**/
  75
  76 #endif // !defined(BOOST_ASIO_HAS_VARIADIC_TEMPLATES)
  77
  78 #include <boost/asio/detail/push_options.hpp>
  79
  80 namespace boost {
  81 namespace asio {
  82 namespace detail {
  83
  84 // A separate base class is used to ensure that the streambuf is initialised
  85 // prior to the basic_socket_iostream's basic_iostream base class.
  86 template <typename Protocol, typename StreamSocketService,
  87     typename Time, typename TimeTraits, typename TimerService>
  88 class socket_iostream_base
  89 {
  90 protected:
  91   basic_socket_streambuf<Protocol, StreamSocketService,
  92     Time, TimeTraits, TimerService> streambuf_;
  93 };
  94
  95 }
  96
  97 /// Iostream interface for a socket.
  98 template <typename Protocol,
  99     typename StreamSocketService = stream_socket_service<Protocol>,
 100 #if defined(BOOST_ASIO_HAS_BOOST_DATE_TIME) \
 101   || defined(GENERATING_DOCUMENTATION)
 102     typename Time = boost::posix_time::ptime,
 103     typename TimeTraits = boost::asio::time_traits<Time>,
 104     typename TimerService = deadline_timer_service<Time, TimeTraits> >
 105 #else
 106     typename Time = steady_timer::clock_type,
 107     typename TimeTraits = steady_timer::traits_type,
 108     typename TimerService = steady_timer::service_type>
 109 #endif
 110 class basic_socket_iostream
 111   : private detail::socket_iostream_base<Protocol,
 112         StreamSocketService, Time, TimeTraits, TimerService>,
 113     public std::basic_iostream<char>
 114 {
 115 private:
 116   // These typedefs are intended keep this class's implementation independent
 117   // of whether it's using Boost.DateTime, Boost.Chrono or std::chrono.
 118 #if defined(BOOST_ASIO_HAS_BOOST_DATE_TIME)
 119   typedef TimeTraits traits_helper;
 120 #else
 121   typedef detail::chrono_time_traits<Time, TimeTraits> traits_helper;
 122 #endif
 123
 124 public:
 125   /// The endpoint type.
 126   typedef typename Protocol::endpoint endpoint_type;
 127
 128 #if defined(GENERATING_DOCUMENTATION)
 129   /// The time type.
 130   typedef typename TimeTraits::time_type time_type;
 131
 132   /// The duration type.
 133   typedef typename TimeTraits::duration_type duration_type;
 134 #else
 135   typedef typename traits_helper::time_type time_type;
 136   typedef typename traits_helper::duration_type duration_type;
 137 #endif
 138
 139   /// Construct a basic_socket_iostream without establishing a connection.
 140   basic_socket_iostream()
 141     : std::basic_iostream<char>(
 142         &this->detail::socket_iostream_base<
 143           Protocol, StreamSocketService, Time,
 144           TimeTraits, TimerService>::streambuf_)
 145   {
 146     this->setf(std::ios_base::unitbuf);
 147   }
 148
 149 #if defined(GENERATING_DOCUMENTATION)
 150   /// Establish a connection to an endpoint corresponding to a resolver query.
 151   /**
 152    * This constructor automatically establishes a connection based on the
 153    * supplied resolver query parameters. The arguments are used to construct
 154    * a resolver query object.
 155    */
 156   template <typename T1, ..., typename TN>
 157   explicit basic_socket_iostream(T1 t1, ..., TN tn);
 158 #elif defined(BOOST_ASIO_HAS_VARIADIC_TEMPLATES)
 159   template <typename... T>
 160   explicit basic_socket_iostream(T... x)
 161     : std::basic_iostream<char>(
 162         &this->detail::socket_iostream_base<
 163           Protocol, StreamSocketService, Time,
 164           TimeTraits, TimerService>::streambuf_)
 165   {
 166     this->setf(std::ios_base::unitbuf);
 167     if (rdbuf()->connect(x...) == 0)
 168       this->setstate(std::ios_base::failbit);
 169   }
 170 #else
 171   BOOST_ASIO_VARIADIC_GENERATE(BOOST_ASIO_PRIVATE_CTR_DEF)
 172 #endif
 173
 174 #if defined(GENERATING_DOCUMENTATION)
 175   /// Establish a connection to an endpoint corresponding to a resolver query.
 176   /**
 177    * This function automatically establishes a connection based on the supplied
 178    * resolver query parameters. The arguments are used to construct a resolver
 179    * query object.
 180    */
 181   template <typename T1, ..., typename TN>
 182   void connect(T1 t1, ..., TN tn);
 183 #elif defined(BOOST_ASIO_HAS_VARIADIC_TEMPLATES)
 184   template <typename... T>
 185   void connect(T... x)
 186   {
 187     if (rdbuf()->connect(x...) == 0)
 188       this->setstate(std::ios_base::failbit);
 189   }
 190 #else
 191   BOOST_ASIO_VARIADIC_GENERATE(BOOST_ASIO_PRIVATE_CONNECT_DEF)
 192 #endif
 193
 194   /// Close the connection.
 195   void close()
 196   {
 197     if (rdbuf()->close() == 0)
 198       this->setstate(std::ios_base::failbit);
 199   }
 200
 201   /// Return a pointer to the underlying streambuf.
 202   basic_socket_streambuf<Protocol, StreamSocketService,
 203     Time, TimeTraits, TimerService>* rdbuf() const
 204   {
 205     return const_cast<basic_socket_streambuf<Protocol, StreamSocketService,
 206       Time, TimeTraits, TimerService>*>(
 207         &this->detail::socket_iostream_base<
 208           Protocol, StreamSocketService, Time,
 209           TimeTraits, TimerService>::streambuf_);
 210   }
 211
 212   /// Get the last error associated with the stream.
 213   /**
 214    * @return An \c error_code corresponding to the last error from the stream.
 215    *
 216    * @par Example
 217    * To print the error associated with a failure to establish a connection:
 218    * @code tcp::iostream s("www.boost.org", "http");
 219    * if (!s)
 220    * {
 221    *   std::cout << "Error: " << s.error().message() << std::endl;
 222    * } @endcode
 223    */
 224   const boost::system::error_code& error() const
 225   {
 226     return rdbuf()->puberror();
 227   }
 228
 229   /// Get the stream's expiry time as an absolute time.
 230   /**
 231    * @return An absolute time value representing the stream's expiry time.
 232    */
 233   time_type expires_at() const
 234   {
 235     return rdbuf()->expires_at();
 236   }
 237
 238   /// Set the stream's expiry time as an absolute time.
 239   /**
 240    * This function sets the expiry time associated with the stream. Stream
 241    * operations performed after this time (where the operations cannot be
 242    * completed using the internal buffers) will fail with the error
 243    * boost::asio::error::operation_aborted.
 244    *
 245    * @param expiry_time The expiry time to be used for the stream.
 246    */
 247   void expires_at(const time_type& expiry_time)
 248   {
 249     rdbuf()->expires_at(expiry_time);
 250   }
 251
 252   /// Get the timer's expiry time relative to now.
 253   /**
 254    * @return A relative time value representing the stream's expiry time.
 255    */
 256   duration_type expires_from_now() const
 257   {
 258     return rdbuf()->expires_from_now();
 259   }
 260
 261   /// Set the stream's expiry time relative to now.
 262   /**
 263    * This function sets the expiry time associated with the stream. Stream
 264    * operations performed after this time (where the operations cannot be
 265    * completed using the internal buffers) will fail with the error
 266    * boost::asio::error::operation_aborted.
 267    *
 268    * @param expiry_time The expiry time to be used for the timer.
 269    */
 270   void expires_from_now(const duration_type& expiry_time)
 271   {
 272     rdbuf()->expires_from_now(expiry_time);
 273   }
 274 };
 275
 276 } // namespace asio
 277 } // namespace boost
 278
 279 #include <boost/asio/detail/pop_options.hpp>
 280
 281 #if !defined(BOOST_ASIO_HAS_VARIADIC_TEMPLATES)
 282 # undef BOOST_ASIO_PRIVATE_CTR_DEF
 283 # undef BOOST_ASIO_PRIVATE_CONNECT_DEF
 284 #endif // !defined(BOOST_ASIO_HAS_VARIADIC_TEMPLATES)
 285
 286 #endif // !defined(BOOST_ASIO_NO_IOSTREAM)
 287
 288 #endif // BOOST_ASIO_BASIC_SOCKET_IOSTREAM_HPP