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Update IDF to a0468b2 (#2108)

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* Update IDF to a0468b2

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* Fix PIO builds and change coex policy
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//
// write.hpp
// ~~~~~~~~~
//
// Copyright (c) 2003-2018 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)
//
#ifndef ASIO_WRITE_HPP
#define ASIO_WRITE_HPP
#if defined(_MSC_VER) && (_MSC_VER >= 1200)
# pragma once
#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
#include "asio/detail/config.hpp"
#include <cstddef>
#include "asio/async_result.hpp"
#include "asio/buffer.hpp"
#include "asio/error.hpp"
#if !defined(ASIO_NO_EXTENSIONS)
# include "asio/basic_streambuf_fwd.hpp"
#endif // !defined(ASIO_NO_EXTENSIONS)
#include "asio/detail/push_options.hpp"
namespace asio {
/**
* @defgroup write asio::write
*
* @brief Write a certain amount of data to a stream before returning.
*/
/*@{*/
/// Write all of the supplied data to a stream before returning.
/**
* This function is used to write a certain number of bytes of data to a stream.
* The call will block 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 zero or more calls to the stream's
* write_some function.
*
* @param s The stream to which the data is to be written. The type must support
* the SyncWriteStream concept.
*
* @param buffers One or more buffers containing the data to be written. The sum
* of the buffer sizes indicates the maximum number of bytes to write to the
* stream.
*
* @returns The number of bytes transferred.
*
* @throws asio::system_error Thrown on failure.
*
* @par Example
* To write a single data buffer use the @ref buffer function as follows:
* @code asio::write(s, 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.
*
* @note This overload is equivalent to calling:
* @code asio::write(
* s, buffers,
* asio::transfer_all()); @endcode
*/
template <typename SyncWriteStream, typename ConstBufferSequence>
std::size_t write(SyncWriteStream& s, const ConstBufferSequence& buffers,
typename enable_if<
is_const_buffer_sequence<ConstBufferSequence>::value
>::type* = 0);
/// Write all of the supplied data to a stream before returning.
/**
* This function is used to write a certain number of bytes of data to a stream.
* The call will block 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 zero or more calls to the stream's
* write_some function.
*
* @param s The stream to which the data is to be written. The type must support
* the SyncWriteStream concept.
*
* @param buffers One or more buffers containing the data to be written. The sum
* of the buffer sizes indicates the maximum number of bytes to write to the
* stream.
*
* @param ec Set to indicate what error occurred, if any.
*
* @returns The number of bytes transferred.
*
* @par Example
* To write a single data buffer use the @ref buffer function as follows:
* @code asio::write(s, asio::buffer(data, size), ec); @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.
*
* @note This overload is equivalent to calling:
* @code asio::write(
* s, buffers,
* asio::transfer_all(), ec); @endcode
*/
template <typename SyncWriteStream, typename ConstBufferSequence>
std::size_t write(SyncWriteStream& s, const ConstBufferSequence& buffers,
asio::error_code& ec,
typename enable_if<
is_const_buffer_sequence<ConstBufferSequence>::value
>::type* = 0);
/// Write a certain amount of data to a stream before returning.
/**
* This function is used to write a certain number of bytes of data to a stream.
* The call will block 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 0.
*
* This operation is implemented in terms of zero or more calls to the stream's
* write_some function.
*
* @param s The stream to which the data is to be written. The type must support
* the SyncWriteStream concept.
*
* @param buffers One or more buffers containing the data to be written. The sum
* of the buffer sizes indicates the maximum number of bytes to write to the
* stream.
*
* @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 std::size_t completion_condition(
* // Result of latest write_some operation.
* const asio::error_code& error,
*
* // Number of bytes transferred so far.
* std::size_t bytes_transferred
* ); @endcode
* A return value of 0 indicates that the write operation is complete. A
* non-zero return value indicates the maximum number of bytes to be written on
* the next call to the stream's write_some function.
*
* @returns The number of bytes transferred.
*
* @throws asio::system_error Thrown on failure.
*
* @par Example
* To write a single data buffer use the @ref buffer function as follows:
* @code asio::write(s, asio::buffer(data, size),
* asio::transfer_at_least(32)); @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 SyncWriteStream, typename ConstBufferSequence,
typename CompletionCondition>
std::size_t write(SyncWriteStream& s, const ConstBufferSequence& buffers,
CompletionCondition completion_condition,
typename enable_if<
is_const_buffer_sequence<ConstBufferSequence>::value
>::type* = 0);
/// Write a certain amount of data to a stream before returning.
/**
* This function is used to write a certain number of bytes of data to a stream.
* The call will block 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 0.
*
* This operation is implemented in terms of zero or more calls to the stream's
* write_some function.
*
* @param s The stream to which the data is to be written. The type must support
* the SyncWriteStream concept.
*
* @param buffers One or more buffers containing the data to be written. The sum
* of the buffer sizes indicates the maximum number of bytes to write to the
* stream.
*
* @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 std::size_t completion_condition(
* // Result of latest write_some operation.
* const asio::error_code& error,
*
* // Number of bytes transferred so far.
* std::size_t bytes_transferred
* ); @endcode
* A return value of 0 indicates that the write operation is complete. A
* non-zero return value indicates the maximum number of bytes to be written on
* the next call to the stream's write_some function.
*
* @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 ConstBufferSequence,
typename CompletionCondition>
std::size_t write(SyncWriteStream& s, const ConstBufferSequence& buffers,
CompletionCondition completion_condition, asio::error_code& ec,
typename enable_if<
is_const_buffer_sequence<ConstBufferSequence>::value
>::type* = 0);
/// Write all of the supplied data to a stream before returning.
/**
* This function is used to write a certain number of bytes of data to a stream.
* The call will block until one of the following conditions is true:
*
* @li All of the data in the supplied dynamic buffer sequence has been written.
*
* @li An error occurred.
*
* This operation is implemented in terms of zero or more calls to the stream's
* write_some function.
*
* @param s The stream to which the data is to be written. The type must support
* the SyncWriteStream concept.
*
* @param buffers The dynamic buffer sequence from which data will be written.
* Successfully written data is automatically consumed from the buffers.
*
* @returns The number of bytes transferred.
*
* @throws asio::system_error Thrown on failure.
*
* @note This overload is equivalent to calling:
* @code asio::write(
* s, buffers,
* asio::transfer_all()); @endcode
*/
template <typename SyncWriteStream, typename DynamicBuffer>
std::size_t write(SyncWriteStream& s,
ASIO_MOVE_ARG(DynamicBuffer) buffers,
typename enable_if<
is_dynamic_buffer<typename decay<DynamicBuffer>::type>::value
>::type* = 0);
/// Write all of the supplied data to a stream before returning.
/**
* This function is used to write a certain number of bytes of data to a stream.
* The call will block until one of the following conditions is true:
*
* @li All of the data in the supplied dynamic buffer sequence has been written.
*
* @li An error occurred.
*
* This operation is implemented in terms of zero or more calls to the stream's
* write_some function.
*
* @param s The stream to which the data is to be written. The type must support
* the SyncWriteStream concept.
*
* @param buffers The dynamic buffer sequence from which data will be written.
* Successfully written data is automatically consumed from the buffers.
*
* @param ec Set to indicate what error occurred, if any.
*
* @returns The number of bytes transferred.
*
* @note This overload is equivalent to calling:
* @code asio::write(
* s, buffers,
* asio::transfer_all(), ec); @endcode
*/
template <typename SyncWriteStream, typename DynamicBuffer>
std::size_t write(SyncWriteStream& s,
ASIO_MOVE_ARG(DynamicBuffer) buffers,
asio::error_code& ec,
typename enable_if<
is_dynamic_buffer<typename decay<DynamicBuffer>::type>::value
>::type* = 0);
/// Write a certain amount of data to a stream before returning.
/**
* This function is used to write a certain number of bytes of data to a stream.
* The call will block until one of the following conditions is true:
*
* @li All of the data in the supplied dynamic buffer sequence has been written.
*
* @li The completion_condition function object returns 0.
*
* This operation is implemented in terms of zero or more calls to the stream's
* write_some function.
*
* @param s The stream to which the data is to be written. The type must support
* the SyncWriteStream concept.
*
* @param buffers The dynamic buffer sequence from which data will be written.
* Successfully written data is automatically consumed from the buffers.
*
* @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 std::size_t completion_condition(
* // Result of latest write_some operation.
* const asio::error_code& error,
*
* // Number of bytes transferred so far.
* std::size_t bytes_transferred
* ); @endcode
* A return value of 0 indicates that the write operation is complete. A
* non-zero return value indicates the maximum number of bytes to be written on
* the next call to the stream's write_some function.
*
* @returns The number of bytes transferred.
*
* @throws asio::system_error Thrown on failure.
*/
template <typename SyncWriteStream, typename DynamicBuffer,
typename CompletionCondition>
std::size_t write(SyncWriteStream& s,
ASIO_MOVE_ARG(DynamicBuffer) buffers,
CompletionCondition completion_condition,
typename enable_if<
is_dynamic_buffer<typename decay<DynamicBuffer>::type>::value
>::type* = 0);
/// Write a certain amount of data to a stream before returning.
/**
* This function is used to write a certain number of bytes of data to a stream.
* The call will block until one of the following conditions is true:
*
* @li All of the data in the supplied dynamic buffer sequence has been written.
*
* @li The completion_condition function object returns 0.
*
* This operation is implemented in terms of zero or more calls to the stream's
* write_some function.
*
* @param s The stream to which the data is to be written. The type must support
* the SyncWriteStream concept.
*
* @param buffers The dynamic buffer sequence from which data will be written.
* Successfully written data is automatically consumed from the buffers.
*
* @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 std::size_t completion_condition(
* // Result of latest write_some operation.
* const asio::error_code& error,
*
* // Number of bytes transferred so far.
* std::size_t bytes_transferred
* ); @endcode
* A return value of 0 indicates that the write operation is complete. A
* non-zero return value indicates the maximum number of bytes to be written on
* the next call to the stream's write_some function.
*
* @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 DynamicBuffer,
typename CompletionCondition>
std::size_t write(SyncWriteStream& s,
ASIO_MOVE_ARG(DynamicBuffer) buffers,
CompletionCondition completion_condition, asio::error_code& ec,
typename enable_if<
is_dynamic_buffer<typename decay<DynamicBuffer>::type>::value
>::type* = 0);
#if !defined(ASIO_NO_EXTENSIONS)
#if !defined(ASIO_NO_IOSTREAM)
/// Write all of the supplied data to a stream before returning.
/**
* This function is used to write a certain number of bytes of data to a stream.
* The call will block 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 zero or more calls to the stream's
* write_some function.
*
* @param s The stream to which the data is to be written. The type must support
* the SyncWriteStream concept.
*
* @param b The basic_streambuf object from which data will be written.
*
* @returns The number of bytes transferred.
*
* @throws asio::system_error Thrown on failure.
*
* @note This overload is equivalent to calling:
* @code asio::write(
* s, b,
* asio::transfer_all()); @endcode
*/
template <typename SyncWriteStream, typename Allocator>
std::size_t write(SyncWriteStream& s, basic_streambuf<Allocator>& b);
/// Write all of the supplied data to a stream before returning.
/**
* This function is used to write a certain number of bytes of data to a stream.
* The call will block 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 zero or more calls to the stream's
* write_some function.
*
* @param s The stream to which the data is to be written. The type must support
* the SyncWriteStream concept.
*
* @param b The basic_streambuf object from which data will be written.
*
* @param ec Set to indicate what error occurred, if any.
*
* @returns The number of bytes transferred.
*
* @note This overload is equivalent to calling:
* @code asio::write(
* s, b,
* asio::transfer_all(), ec); @endcode
*/
template <typename SyncWriteStream, typename Allocator>
std::size_t write(SyncWriteStream& s, basic_streambuf<Allocator>& b,
asio::error_code& ec);
/// Write a certain amount of data to a stream before returning.
/**
* This function is used to write a certain number of bytes of data to a stream.
* The call will block 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 0.
*
* This operation is implemented in terms of zero or more calls to the stream's
* write_some function.
*
* @param s The stream to which the data is to be written. The type must support
* the SyncWriteStream concept.
*
* @param b The basic_streambuf object from which data will be written.
*
* @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 std::size_t completion_condition(
* // Result of latest write_some operation.
* const asio::error_code& error,
*
* // Number of bytes transferred so far.
* std::size_t bytes_transferred
* ); @endcode
* A return value of 0 indicates that the write operation is complete. A
* non-zero return value indicates the maximum number of bytes to be written on
* the next call to the stream's write_some function.
*
* @returns The number of bytes transferred.
*
* @throws asio::system_error Thrown on failure.
*/
template <typename SyncWriteStream, typename Allocator,
typename CompletionCondition>
std::size_t write(SyncWriteStream& s, basic_streambuf<Allocator>& b,
CompletionCondition completion_condition);
/// Write a certain amount of data to a stream before returning.
/**
* This function is used to write a certain number of bytes of data to a stream.
* The call will block 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 0.
*
* This operation is implemented in terms of zero or more calls to the stream's
* write_some function.
*
* @param s The stream to which the data is to be written. The type must support
* the SyncWriteStream concept.
*
* @param b The basic_streambuf object from which data will be written.
*
* @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 std::size_t completion_condition(
* // Result of latest write_some operation.
* const asio::error_code& error,
*
* // Number of bytes transferred so far.
* std::size_t bytes_transferred
* ); @endcode
* A return value of 0 indicates that the write operation is complete. A
* non-zero return value indicates the maximum number of bytes to be written on
* the next call to the stream's write_some function.
*
* @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);
#endif // !defined(ASIO_NO_IOSTREAM)
#endif // !defined(ASIO_NO_EXTENSIONS)
/*@}*/
/**
* @defgroup async_write asio::async_write
*
* @brief Start an asynchronous operation to write a certain amount of data to a
* stream.
*/
/*@{*/
/// Start an asynchronous operation to write 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 zero or more calls to the stream's
* async_write_some function, and is known as a <em>composed operation</em>. The
* program must ensure that the stream performs no other write operations (such
* as async_write, the stream's async_write_some function, or any other composed
* operations that perform writes) until this operation completes.
*
* @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_context::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>
ASIO_INITFN_RESULT_TYPE(WriteHandler,
void (asio::error_code, std::size_t))
async_write(AsyncWriteStream& s, const ConstBufferSequence& buffers,
ASIO_MOVE_ARG(WriteHandler) handler,
typename enable_if<
is_const_buffer_sequence<ConstBufferSequence>::value
>::type* = 0);
/// 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 0.
*
* This operation is implemented in terms of zero or more calls to the stream's
* async_write_some function, and is known as a <em>composed operation</em>. The
* program must ensure that the stream performs no other write operations (such
* as async_write, the stream's async_write_some function, or any other composed
* operations that perform writes) until this operation completes.
*
* @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 std::size_t completion_condition(
* // Result of latest async_write_some operation.
* const asio::error_code& error,
*
* // Number of bytes transferred so far.
* std::size_t bytes_transferred
* ); @endcode
* A return value of 0 indicates that the write operation is complete. A
* non-zero return value indicates the maximum number of bytes to be written on
* the next call to the stream's async_write_some function.
*
* @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_context::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>
ASIO_INITFN_RESULT_TYPE(WriteHandler,
void (asio::error_code, std::size_t))
async_write(AsyncWriteStream& s, const ConstBufferSequence& buffers,
CompletionCondition completion_condition,
ASIO_MOVE_ARG(WriteHandler) handler,
typename enable_if<
is_const_buffer_sequence<ConstBufferSequence>::value
>::type* = 0);
/// Start an asynchronous operation to write 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 dynamic buffer sequence has been written.
*
* @li An error occurred.
*
* This operation is implemented in terms of zero or more calls to the stream's
* async_write_some function, and is known as a <em>composed operation</em>. The
* program must ensure that the stream performs no other write operations (such
* as async_write, the stream's async_write_some function, or any other composed
* operations that perform writes) until this operation completes.
*
* @param s The stream to which the data is to be written. The type must support
* the AsyncWriteStream concept.
*
* @param buffers The dynamic buffer sequence from which data will 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. Successfully written
* data is automatically consumed from the buffers.
*
* @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_context::post().
*/
template <typename AsyncWriteStream,
typename DynamicBuffer, typename WriteHandler>
ASIO_INITFN_RESULT_TYPE(WriteHandler,
void (asio::error_code, std::size_t))
async_write(AsyncWriteStream& s,
ASIO_MOVE_ARG(DynamicBuffer) buffers,
ASIO_MOVE_ARG(WriteHandler) handler,
typename enable_if<
is_dynamic_buffer<typename decay<DynamicBuffer>::type>::value
>::type* = 0);
/// 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 dynamic buffer sequence has been written.
*
* @li The completion_condition function object returns 0.
*
* This operation is implemented in terms of zero or more calls to the stream's
* async_write_some function, and is known as a <em>composed operation</em>. The
* program must ensure that the stream performs no other write operations (such
* as async_write, the stream's async_write_some function, or any other composed
* operations that perform writes) until this operation completes.
*
* @param s The stream to which the data is to be written. The type must support
* the AsyncWriteStream concept.
*
* @param buffers The dynamic buffer sequence from which data will 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. Successfully written
* data is automatically consumed from the buffers.
*
* @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 std::size_t completion_condition(
* // Result of latest async_write_some operation.
* const asio::error_code& error,
*
* // Number of bytes transferred so far.
* std::size_t bytes_transferred
* ); @endcode
* A return value of 0 indicates that the write operation is complete. A
* non-zero return value indicates the maximum number of bytes to be written on
* the next call to the stream's async_write_some function.
*
* @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_context::post().
*/
template <typename AsyncWriteStream, typename DynamicBuffer,
typename CompletionCondition, typename WriteHandler>
ASIO_INITFN_RESULT_TYPE(WriteHandler,
void (asio::error_code, std::size_t))
async_write(AsyncWriteStream& s,
ASIO_MOVE_ARG(DynamicBuffer) buffers,
CompletionCondition completion_condition,
ASIO_MOVE_ARG(WriteHandler) handler,
typename enable_if<
is_dynamic_buffer<typename decay<DynamicBuffer>::type>::value
>::type* = 0);
#if !defined(ASIO_NO_EXTENSIONS)
#if !defined(ASIO_NO_IOSTREAM)
/// Start an asynchronous operation to write 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 basic_streambuf has been written.
*
* @li An error occurred.
*
* This operation is implemented in terms of zero or more calls to the stream's
* async_write_some function, and is known as a <em>composed operation</em>. The
* program must ensure that the stream performs no other write operations (such
* as async_write, the stream's async_write_some function, or any other composed
* operations that perform writes) until this operation completes.
*
* @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_context::post().
*/
template <typename AsyncWriteStream, typename Allocator, typename WriteHandler>
ASIO_INITFN_RESULT_TYPE(WriteHandler,
void (asio::error_code, std::size_t))
async_write(AsyncWriteStream& s, basic_streambuf<Allocator>& b,
ASIO_MOVE_ARG(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 0.
*
* This operation is implemented in terms of zero or more calls to the stream's
* async_write_some function, and is known as a <em>composed operation</em>. The
* program must ensure that the stream performs no other write operations (such
* as async_write, the stream's async_write_some function, or any other composed
* operations that perform writes) until this operation completes.
*
* @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 std::size_t completion_condition(
* // Result of latest async_write_some operation.
* const asio::error_code& error,
*
* // Number of bytes transferred so far.
* std::size_t bytes_transferred
* ); @endcode
* A return value of 0 indicates that the write operation is complete. A
* non-zero return value indicates the maximum number of bytes to be written on
* the next call to the stream's async_write_some function.
*
* @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_context::post().
*/
template <typename AsyncWriteStream, typename Allocator,
typename CompletionCondition, typename WriteHandler>
ASIO_INITFN_RESULT_TYPE(WriteHandler,
void (asio::error_code, std::size_t))
async_write(AsyncWriteStream& s, basic_streambuf<Allocator>& b,
CompletionCondition completion_condition,
ASIO_MOVE_ARG(WriteHandler) handler);
#endif // !defined(ASIO_NO_IOSTREAM)
#endif // !defined(ASIO_NO_EXTENSIONS)
/*@}*/
} // namespace asio
#include "asio/detail/pop_options.hpp"
#include "asio/impl/write.hpp"
#endif // ASIO_WRITE_HPP