write.hpp

这是国外的resip协议栈

 *   const asio::error_code& error, // Result of latest write_some
 *                                           // operation.
 *
 *   std::size_t bytes_transferred           // Number of bytes transferred
 *                                           // so far.
 * ); @endcode
 * A return value of true indicates that the write operation is complete. False
 * indicates that further calls to the stream's write_some function are
 * required.
 *
 * @param ec Set to indicate what error occurred, if any.
 *
 * @returns The number of bytes written. If an error occurs, returns the total
 * number of bytes successfully transferred prior to the error.
 */
template <typename SyncWriteStream, typename Allocator,
    typename CompletionCondition>
std::size_t write(SyncWriteStream& s, basic_streambuf<Allocator>& b,
    CompletionCondition completion_condition, asio::error_code& ec);

/*@}*/
/**
 * @defgroup async_write asio::async_write
 */
/*@{*/

/// Start an asynchronous operation to write of all of the supplied data to a
/// stream.
/**
 * This function is used to asynchronously write a certain number of bytes of
 * data to a stream. The function call always returns immediately. The
 * asynchronous operation will continue until one of the following conditions
 * is true:
 *
 * @li All of the data in the supplied buffers has been written. That is, the
 * bytes transferred is equal to the sum of the buffer sizes.
 *
 * @li An error occurred.
 *
 * This operation is implemented in terms of one or more calls to the stream's
 * async_write_some function.
 *
 * @param s The stream to which the data is to be written. The type must support
 * the AsyncWriteStream concept.
 *
 * @param buffers One or more buffers containing the data to be written.
 * 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 asio::error_code& error, // Result of operation.
 *
 *   std::size_t bytes_transferred           // Number of bytes written from the
 *                                           // buffers. If an error occurred,
 *                                           // this will be less than the sum
 *                                           // of the buffer sizes.
 * ); @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
 * asio::io_service::post().
 *
 * @par Example
 * To write a single data buffer use the @ref buffer function as follows:
 * @code
 * asio::async_write(s, 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 AsyncWriteStream, typename ConstBufferSequence,
    typename WriteHandler>
void async_write(AsyncWriteStream& s, const ConstBufferSequence& buffers,
    WriteHandler handler);

/// Start an asynchronous operation to write a certain amount of data to a
/// stream.
/**
 * This function is used to asynchronously write a certain number of bytes of
 * data to a stream. The function call always returns immediately. The
 * asynchronous operation will continue until one of the following conditions
 * is true:
 *
 * @li All of the data in the supplied buffers has been written. That is, the
 * bytes transferred is equal to the sum of the buffer sizes.
 *
 * @li The completion_condition function object returns true.
 *
 * This operation is implemented in terms of one or more calls to the stream's
 * async_write_some function.
 *
 * @param s The stream to which the data is to be written. The type must support
 * the AsyncWriteStream concept.
 *
 * @param buffers One or more buffers containing the data to be written.
 * 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 completion_condition The function object to be called to determine
 * whether the write operation is complete. The signature of the function object
 * must be:
 * @code bool completion_condition(
 *   const asio::error_code& error, // Result of latest write_some
 *                                           // operation.
 *
 *   std::size_t bytes_transferred           // Number of bytes transferred
 *                                           // so far.
 * ); @endcode
 * A return value of true indicates that the write operation is complete. False
 * indicates that further calls to the stream's async_write_some function are
 * required.
 *
 * @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 asio::error_code& error, // Result of operation.
 *
 *   std::size_t bytes_transferred           // Number of bytes written from the
 *                                           // buffers. If an error occurred,
 *                                           // this will be less than the sum
 *                                           // of the buffer sizes.
 * ); @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
 * asio::io_service::post().
 *
 * @par Example
 * To write a single data buffer use the @ref buffer function as follows:
 * @code asio::async_write(s,
 *     asio::buffer(data, size),
 *     asio::transfer_at_least(32),
 *     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 AsyncWriteStream, typename ConstBufferSequence,
    typename CompletionCondition, typename WriteHandler>
void async_write(AsyncWriteStream& s, const ConstBufferSequence& buffers,
    CompletionCondition completion_condition, WriteHandler handler);

/// Start an asynchronous operation to write a certain amount of data to a
/// stream.
/**
 * This function is used to asynchronously write a certain number of bytes of
 * data to a stream. The function call always returns immediately. The
 * asynchronous operation will continue until one of the following conditions
 * is true:
 *
 * @li All of the data in the supplied basic_streambuf has been written.
 *
 * @li An error occurred.
 *
 * This operation is implemented in terms of one or more calls to the stream's
 * async_write_some function.
 *
 * @param s The stream to which the data is to be written. The type must support
 * the AsyncWriteStream concept.
 *
 * @param b A basic_streambuf object from which data will be written. Ownership
 * of the streambuf is retained by the caller, which must guarantee that it
 * remains 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 asio::error_code& error, // Result of operation.
 *
 *   std::size_t bytes_transferred           // Number of bytes written from the
 *                                           // buffers. If an error occurred,
 *                                           // this will be less than the sum
 *                                           // of the buffer sizes.
 * ); @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
 * asio::io_service::post().
 */
template <typename AsyncWriteStream, typename Allocator, typename WriteHandler>
void async_write(AsyncWriteStream& s, basic_streambuf<Allocator>& b,
    WriteHandler handler);

/// Start an asynchronous operation to write a certain amount of data to a
/// stream.
/**
 * This function is used to asynchronously write a certain number of bytes of
 * data to a stream. The function call always returns immediately. The
 * asynchronous operation will continue until one of the following conditions
 * is true:
 *
 * @li All of the data in the supplied basic_streambuf has been written.
 *
 * @li The completion_condition function object returns true.
 *
 * This operation is implemented in terms of one or more calls to the stream's
 * async_write_some function.
 *
 * @param s The stream to which the data is to be written. The type must support
 * the AsyncWriteStream concept.
 *
 * @param b A basic_streambuf object from which data will be written. Ownership
 * of the streambuf is retained by the caller, which must guarantee that it
 * remains valid until the handler is called.
 *
 * @param completion_condition The function object to be called to determine
 * whether the write operation is complete. The signature of the function object
 * must be:
 * @code bool completion_condition(
 *   const asio::error_code& error, // Result of latest write_some
 *                                           // operation.
 *
 *   std::size_t bytes_transferred           // Number of bytes transferred
 *                                           // so far.
 * ); @endcode
 * A return value of true indicates that the write operation is complete. False
 * indicates that further calls to the stream's async_write_some function are
 * required.
 *
 * @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 asio::error_code& error, // Result of operation.
 *
 *   std::size_t bytes_transferred           // Number of bytes written from the
 *                                           // buffers. If an error occurred,
 *                                           // this will be less than the sum
 *                                           // of the buffer sizes.
 * ); @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
 * asio::io_service::post().
 */
template <typename AsyncWriteStream, typename Allocator,
    typename CompletionCondition, typename WriteHandler>
void async_write(AsyncWriteStream& s, basic_streambuf<Allocator>& b,
    CompletionCondition completion_condition, WriteHandler handler);

/*@}*/

} // namespace asio

#include "asio/impl/write.ipp"

#include "asio/detail/pop_options.hpp"

#endif // ASIO_WRITE_HPP