// posix/stream_descriptor.hpp
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~
//
-// Copyright (c) 2003-2018 Christopher M. Kohlhoff (chris at kohlhoff dot com)
+// Copyright (c) 2003-2019 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)
#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
#include <boost/asio/detail/config.hpp>
-#include <boost/asio/posix/descriptor.hpp>
#if defined(BOOST_ASIO_HAS_POSIX_STREAM_DESCRIPTOR) \
|| defined(GENERATING_DOCUMENTATION)
-#if defined(BOOST_ASIO_ENABLE_OLD_SERVICES)
-# include <boost/asio/posix/basic_stream_descriptor.hpp>
-#endif // defined(BOOST_ASIO_ENABLE_OLD_SERVICES)
+#include <boost/asio/posix/basic_stream_descriptor.hpp>
namespace boost {
namespace asio {
namespace posix {
-#if defined(BOOST_ASIO_ENABLE_OLD_SERVICES)
-// Typedef for the typical usage of a stream-oriented descriptor.
+/// Typedef for the typical usage of a stream-oriented descriptor.
typedef basic_stream_descriptor<> stream_descriptor;
-#else // defined(BOOST_ASIO_ENABLE_OLD_SERVICES)
-/// Provides stream-oriented descriptor functionality.
-/**
- * The posix::stream_descriptor class template provides asynchronous and
- * blocking stream-oriented descriptor functionality.
- *
- * @par Thread Safety
- * @e Distinct @e objects: Safe.@n
- * @e Shared @e objects: Unsafe.
- *
- * @par Concepts:
- * AsyncReadStream, AsyncWriteStream, Stream, SyncReadStream, SyncWriteStream.
- */
-class stream_descriptor
- : public descriptor
-{
-public:
- /// Construct a stream_descriptor without opening it.
- /**
- * This constructor creates a stream descriptor without opening it. The
- * descriptor needs to be opened and then connected or accepted before data
- * can be sent or received on it.
- *
- * @param io_context The io_context object that the stream descriptor will
- * use to dispatch handlers for any asynchronous operations performed on the
- * descriptor.
- */
- explicit stream_descriptor(boost::asio::io_context& io_context)
- : descriptor(io_context)
- {
- }
-
- /// Construct a stream_descriptor on an existing native descriptor.
- /**
- * This constructor creates a stream descriptor object to hold an existing
- * native descriptor.
- *
- * @param io_context The io_context object that the stream descriptor will
- * use to dispatch handlers for any asynchronous operations performed on the
- * descriptor.
- *
- * @param native_descriptor The new underlying descriptor implementation.
- *
- * @throws boost::system::system_error Thrown on failure.
- */
- stream_descriptor(boost::asio::io_context& io_context,
- const native_handle_type& native_descriptor)
- : descriptor(io_context, native_descriptor)
- {
- }
-
-#if defined(BOOST_ASIO_HAS_MOVE) || defined(GENERATING_DOCUMENTATION)
- /// Move-construct a stream_descriptor from another.
- /**
- * This constructor moves a stream descriptor from one object to another.
- *
- * @param other The other stream_descriptor object from which the move
- * will occur.
- *
- * @note Following the move, the moved-from object is in the same state as if
- * constructed using the @c stream_descriptor(io_context&) constructor.
- */
- stream_descriptor(stream_descriptor&& other)
- : descriptor(std::move(other))
- {
- }
-
- /// Move-assign a stream_descriptor from another.
- /**
- * This assignment operator moves a stream descriptor from one object to
- * another.
- *
- * @param other The other stream_descriptor object from which the move
- * will occur.
- *
- * @note Following the move, the moved-from object is in the same state as if
- * constructed using the @c stream_descriptor(io_context&) constructor.
- */
- stream_descriptor& operator=(stream_descriptor&& other)
- {
- descriptor::operator=(std::move(other));
- return *this;
- }
-#endif // defined(BOOST_ASIO_HAS_MOVE) || defined(GENERATING_DOCUMENTATION)
-
- /// Write some data to the descriptor.
- /**
- * This function is used to write data to the stream descriptor. The function
- * call will block until one or more bytes of the data has been written
- * successfully, or until an error occurs.
- *
- * @param buffers One or more data buffers to be written to the descriptor.
- *
- * @returns The number of bytes written.
- *
- * @throws boost::system::system_error Thrown on failure. An error code of
- * boost::asio::error::eof indicates that the connection was closed by the
- * peer.
- *
- * @note The write_some operation may not transmit all of the data to the
- * peer. Consider using the @ref write function if you need to ensure that
- * all data is written before the blocking operation completes.
- *
- * @par Example
- * To write a single data buffer use the @ref buffer function as follows:
- * @code
- * descriptor.write_some(boost::asio::buffer(data, size));
- * @endcode
- * See the @ref buffer documentation for information on writing multiple
- * buffers in one go, and how to use it with arrays, boost::array or
- * std::vector.
- */
- template <typename ConstBufferSequence>
- std::size_t write_some(const ConstBufferSequence& buffers)
- {
- boost::system::error_code ec;
- std::size_t s = this->get_service().write_some(
- this->get_implementation(), buffers, ec);
- boost::asio::detail::throw_error(ec, "write_some");
- return s;
- }
-
- /// Write some data to the descriptor.
- /**
- * This function is used to write data to the stream descriptor. The function
- * call will block until one or more bytes of the data has been written
- * successfully, or until an error occurs.
- *
- * @param buffers One or more data buffers to be written to the descriptor.
- *
- * @param ec Set to indicate what error occurred, if any.
- *
- * @returns The number of bytes written. Returns 0 if an error occurred.
- *
- * @note The write_some operation may not transmit all of the data to the
- * peer. Consider using the @ref write function if you need to ensure that
- * all data is written before the blocking operation completes.
- */
- template <typename ConstBufferSequence>
- std::size_t write_some(const ConstBufferSequence& buffers,
- boost::system::error_code& ec)
- {
- return this->get_service().write_some(
- this->get_implementation(), buffers, ec);
- }
-
- /// Start an asynchronous write.
- /**
- * This function is used to asynchronously write data to the stream
- * descriptor. The function call always returns immediately.
- *
- * @param buffers One or more data buffers to be written to the descriptor.
- * Although the buffers object may be copied as necessary, ownership of the
- * underlying memory blocks is retained by the caller, which must guarantee
- * that they remain valid until the handler is called.
- *
- * @param handler The handler to be called when the write operation completes.
- * Copies will be made of the handler as required. The function signature of
- * the handler must be:
- * @code void handler(
- * const boost::system::error_code& error, // Result of operation.
- * std::size_t bytes_transferred // Number of bytes written.
- * ); @endcode
- * Regardless of whether the asynchronous operation completes immediately or
- * not, the handler will not be invoked from within this function. Invocation
- * of the handler will be performed in a manner equivalent to using
- * boost::asio::io_context::post().
- *
- * @note The write operation may not transmit all of the data to the peer.
- * Consider using the @ref async_write function if you need to ensure that all
- * data is written before the asynchronous operation completes.
- *
- * @par Example
- * To write a single data buffer use the @ref buffer function as follows:
- * @code
- * descriptor.async_write_some(boost::asio::buffer(data, size), handler);
- * @endcode
- * See the @ref buffer documentation for information on writing multiple
- * buffers in one go, and how to use it with arrays, boost::array or
- * std::vector.
- */
- template <typename ConstBufferSequence, typename WriteHandler>
- BOOST_ASIO_INITFN_RESULT_TYPE(WriteHandler,
- void (boost::system::error_code, std::size_t))
- async_write_some(const ConstBufferSequence& buffers,
- BOOST_ASIO_MOVE_ARG(WriteHandler) handler)
- {
- // If you get an error on the following line it means that your handler does
- // not meet the documented type requirements for a WriteHandler.
- BOOST_ASIO_WRITE_HANDLER_CHECK(WriteHandler, handler) type_check;
-
- boost::asio::async_completion<WriteHandler,
- void (boost::system::error_code, std::size_t)> init(handler);
-
- this->get_service().async_write_some(
- this->get_implementation(), buffers, init.completion_handler);
-
- return init.result.get();
- }
-
- /// Read some data from the descriptor.
- /**
- * This function is used to read data from the stream descriptor. The function
- * call will block until one or more bytes of data has been read successfully,
- * or until an error occurs.
- *
- * @param buffers One or more buffers into which the data will be read.
- *
- * @returns The number of bytes read.
- *
- * @throws boost::system::system_error Thrown on failure. An error code of
- * boost::asio::error::eof indicates that the connection was closed by the
- * peer.
- *
- * @note The read_some operation may not read all of the requested number of
- * bytes. Consider using the @ref read function if you need to ensure that
- * the requested amount of data is read before the blocking operation
- * completes.
- *
- * @par Example
- * To read into a single data buffer use the @ref buffer function as follows:
- * @code
- * descriptor.read_some(boost::asio::buffer(data, size));
- * @endcode
- * See the @ref buffer documentation for information on reading into multiple
- * buffers in one go, and how to use it with arrays, boost::array or
- * std::vector.
- */
- template <typename MutableBufferSequence>
- std::size_t read_some(const MutableBufferSequence& buffers)
- {
- boost::system::error_code ec;
- std::size_t s = this->get_service().read_some(
- this->get_implementation(), buffers, ec);
- boost::asio::detail::throw_error(ec, "read_some");
- return s;
- }
-
- /// Read some data from the descriptor.
- /**
- * This function is used to read data from the stream descriptor. The function
- * call will block until one or more bytes of data has been read successfully,
- * or until an error occurs.
- *
- * @param buffers One or more buffers into which the data will be read.
- *
- * @param ec Set to indicate what error occurred, if any.
- *
- * @returns The number of bytes read. Returns 0 if an error occurred.
- *
- * @note The read_some operation may not read all of the requested number of
- * bytes. Consider using the @ref read function if you need to ensure that
- * the requested amount of data is read before the blocking operation
- * completes.
- */
- template <typename MutableBufferSequence>
- std::size_t read_some(const MutableBufferSequence& buffers,
- boost::system::error_code& ec)
- {
- return this->get_service().read_some(
- this->get_implementation(), buffers, ec);
- }
-
- /// Start an asynchronous read.
- /**
- * This function is used to asynchronously read data from the stream
- * descriptor. The function call always returns immediately.
- *
- * @param buffers One or more buffers into which the data will be read.
- * Although the buffers object may be copied as necessary, ownership of the
- * underlying memory blocks is retained by the caller, which must guarantee
- * that they remain valid until the handler is called.
- *
- * @param handler The handler to be called when the read operation completes.
- * Copies will be made of the handler as required. The function signature of
- * the handler must be:
- * @code void handler(
- * const boost::system::error_code& error, // Result of operation.
- * std::size_t bytes_transferred // Number of bytes read.
- * ); @endcode
- * Regardless of whether the asynchronous operation completes immediately or
- * not, the handler will not be invoked from within this function. Invocation
- * of the handler will be performed in a manner equivalent to using
- * boost::asio::io_context::post().
- *
- * @note The read operation may not read all of the requested number of bytes.
- * Consider using the @ref async_read function if you need to ensure that the
- * requested amount of data is read before the asynchronous operation
- * completes.
- *
- * @par Example
- * To read into a single data buffer use the @ref buffer function as follows:
- * @code
- * descriptor.async_read_some(boost::asio::buffer(data, size), handler);
- * @endcode
- * See the @ref buffer documentation for information on reading into multiple
- * buffers in one go, and how to use it with arrays, boost::array or
- * std::vector.
- */
- template <typename MutableBufferSequence, typename ReadHandler>
- BOOST_ASIO_INITFN_RESULT_TYPE(ReadHandler,
- void (boost::system::error_code, std::size_t))
- async_read_some(const MutableBufferSequence& buffers,
- BOOST_ASIO_MOVE_ARG(ReadHandler) handler)
- {
- // If you get an error on the following line it means that your handler does
- // not meet the documented type requirements for a ReadHandler.
- BOOST_ASIO_READ_HANDLER_CHECK(ReadHandler, handler) type_check;
-
- boost::asio::async_completion<ReadHandler,
- void (boost::system::error_code, std::size_t)> init(handler);
-
- this->get_service().async_read_some(
- this->get_implementation(), buffers, init.completion_handler);
-
- return init.result.get();
- }
-};
-#endif // defined(BOOST_ASIO_ENABLE_OLD_SERVICES)
} // namespace posix
} // namespace asio
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