boost/asio/impl/write.hpp
// // impl/write.hpp // ~~~~~~~~~~~~~~ // // Copyright (c) 2003-2024 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 BOOST_ASIO_IMPL_WRITE_HPP #define BOOST_ASIO_IMPL_WRITE_HPP #if defined(_MSC_VER) && (_MSC_VER >= 1200) # pragma once #endif // defined(_MSC_VER) && (_MSC_VER >= 1200) #include <boost/asio/associator.hpp> #include <boost/asio/buffer.hpp> #include <boost/asio/detail/array_fwd.hpp> #include <boost/asio/detail/base_from_cancellation_state.hpp> #include <boost/asio/detail/base_from_completion_cond.hpp> #include <boost/asio/detail/bind_handler.hpp> #include <boost/asio/detail/consuming_buffers.hpp> #include <boost/asio/detail/dependent_type.hpp> #include <boost/asio/detail/handler_cont_helpers.hpp> #include <boost/asio/detail/handler_tracking.hpp> #include <boost/asio/detail/handler_type_requirements.hpp> #include <boost/asio/detail/non_const_lvalue.hpp> #include <boost/asio/detail/throw_error.hpp> #include <boost/asio/detail/push_options.hpp> namespace boost { namespace asio { namespace detail { template <typename SyncWriteStream, typename ConstBufferSequence, typename ConstBufferIterator, typename CompletionCondition> std::size_t write(SyncWriteStream& s, const ConstBufferSequence& buffers, const ConstBufferIterator&, CompletionCondition completion_condition, boost::system::error_code& ec) { ec = boost::system::error_code(); boost::asio::detail::consuming_buffers<const_buffer, ConstBufferSequence, ConstBufferIterator> tmp(buffers); while (!tmp.empty()) { if (std::size_t max_size = detail::adapt_completion_condition_result( completion_condition(ec, tmp.total_consumed()))) tmp.consume(s.write_some(tmp.prepare(max_size), ec)); else break; } return tmp.total_consumed(); } } // namespace detail template <typename SyncWriteStream, typename ConstBufferSequence, typename CompletionCondition> inline std::size_t write(SyncWriteStream& s, const ConstBufferSequence& buffers, CompletionCondition completion_condition, boost::system::error_code& ec, constraint_t< is_const_buffer_sequence<ConstBufferSequence>::value >) { return detail::write(s, buffers, boost::asio::buffer_sequence_begin(buffers), static_cast<CompletionCondition&&>(completion_condition), ec); } template <typename SyncWriteStream, typename ConstBufferSequence> inline std::size_t write(SyncWriteStream& s, const ConstBufferSequence& buffers, constraint_t< is_const_buffer_sequence<ConstBufferSequence>::value >) { boost::system::error_code ec; std::size_t bytes_transferred = write(s, buffers, transfer_all(), ec); boost::asio::detail::throw_error(ec, "write"); return bytes_transferred; } template <typename SyncWriteStream, typename ConstBufferSequence> inline std::size_t write(SyncWriteStream& s, const ConstBufferSequence& buffers, boost::system::error_code& ec, constraint_t< is_const_buffer_sequence<ConstBufferSequence>::value >) { return write(s, buffers, transfer_all(), ec); } template <typename SyncWriteStream, typename ConstBufferSequence, typename CompletionCondition> inline std::size_t write(SyncWriteStream& s, const ConstBufferSequence& buffers, CompletionCondition completion_condition, constraint_t< is_const_buffer_sequence<ConstBufferSequence>::value >) { boost::system::error_code ec; std::size_t bytes_transferred = write(s, buffers, static_cast<CompletionCondition&&>(completion_condition), ec); boost::asio::detail::throw_error(ec, "write"); return bytes_transferred; } #if !defined(BOOST_ASIO_NO_DYNAMIC_BUFFER_V1) template <typename SyncWriteStream, typename DynamicBuffer_v1, typename CompletionCondition> std::size_t write(SyncWriteStream& s, DynamicBuffer_v1&& buffers, CompletionCondition completion_condition, boost::system::error_code& ec, constraint_t< is_dynamic_buffer_v1<decay_t<DynamicBuffer_v1>>::value >, constraint_t< !is_dynamic_buffer_v2<decay_t<DynamicBuffer_v1>>::value >) { decay_t<DynamicBuffer_v1> b( static_cast<DynamicBuffer_v1&&>(buffers)); std::size_t bytes_transferred = write(s, b.data(), static_cast<CompletionCondition&&>(completion_condition), ec); b.consume(bytes_transferred); return bytes_transferred; } template <typename SyncWriteStream, typename DynamicBuffer_v1> inline std::size_t write(SyncWriteStream& s, DynamicBuffer_v1&& buffers, constraint_t< is_dynamic_buffer_v1<decay_t<DynamicBuffer_v1>>::value >, constraint_t< !is_dynamic_buffer_v2<decay_t<DynamicBuffer_v1>>::value >) { boost::system::error_code ec; std::size_t bytes_transferred = write(s, static_cast<DynamicBuffer_v1&&>(buffers), transfer_all(), ec); boost::asio::detail::throw_error(ec, "write"); return bytes_transferred; } template <typename SyncWriteStream, typename DynamicBuffer_v1> inline std::size_t write(SyncWriteStream& s, DynamicBuffer_v1&& buffers, boost::system::error_code& ec, constraint_t< is_dynamic_buffer_v1<decay_t<DynamicBuffer_v1>>::value >, constraint_t< !is_dynamic_buffer_v2<decay_t<DynamicBuffer_v1>>::value >) { return write(s, static_cast<DynamicBuffer_v1&&>(buffers), transfer_all(), ec); } template <typename SyncWriteStream, typename DynamicBuffer_v1, typename CompletionCondition> inline std::size_t write(SyncWriteStream& s, DynamicBuffer_v1&& buffers, CompletionCondition completion_condition, constraint_t< is_dynamic_buffer_v1<decay_t<DynamicBuffer_v1>>::value >, constraint_t< !is_dynamic_buffer_v2<decay_t<DynamicBuffer_v1>>::value >) { boost::system::error_code ec; std::size_t bytes_transferred = write(s, static_cast<DynamicBuffer_v1&&>(buffers), static_cast<CompletionCondition&&>(completion_condition), ec); boost::asio::detail::throw_error(ec, "write"); return bytes_transferred; } #if !defined(BOOST_ASIO_NO_EXTENSIONS) #if !defined(BOOST_ASIO_NO_IOSTREAM) template <typename SyncWriteStream, typename Allocator, typename CompletionCondition> inline std::size_t write(SyncWriteStream& s, boost::asio::basic_streambuf<Allocator>& b, CompletionCondition completion_condition, boost::system::error_code& ec) { return write(s, basic_streambuf_ref<Allocator>(b), static_cast<CompletionCondition&&>(completion_condition), ec); } template <typename SyncWriteStream, typename Allocator> inline std::size_t write(SyncWriteStream& s, boost::asio::basic_streambuf<Allocator>& b) { return write(s, basic_streambuf_ref<Allocator>(b)); } template <typename SyncWriteStream, typename Allocator> inline std::size_t write(SyncWriteStream& s, boost::asio::basic_streambuf<Allocator>& b, boost::system::error_code& ec) { return write(s, basic_streambuf_ref<Allocator>(b), ec); } template <typename SyncWriteStream, typename Allocator, typename CompletionCondition> inline std::size_t write(SyncWriteStream& s, boost::asio::basic_streambuf<Allocator>& b, CompletionCondition completion_condition) { return write(s, basic_streambuf_ref<Allocator>(b), static_cast<CompletionCondition&&>(completion_condition)); } #endif // !defined(BOOST_ASIO_NO_IOSTREAM) #endif // !defined(BOOST_ASIO_NO_EXTENSIONS) #endif // !defined(BOOST_ASIO_NO_DYNAMIC_BUFFER_V1) template <typename SyncWriteStream, typename DynamicBuffer_v2, typename CompletionCondition> std::size_t write(SyncWriteStream& s, DynamicBuffer_v2 buffers, CompletionCondition completion_condition, boost::system::error_code& ec, constraint_t< is_dynamic_buffer_v2<DynamicBuffer_v2>::value >) { std::size_t bytes_transferred = write(s, buffers.data(0, buffers.size()), static_cast<CompletionCondition&&>(completion_condition), ec); buffers.consume(bytes_transferred); return bytes_transferred; } template <typename SyncWriteStream, typename DynamicBuffer_v2> inline std::size_t write(SyncWriteStream& s, DynamicBuffer_v2 buffers, constraint_t< is_dynamic_buffer_v2<DynamicBuffer_v2>::value >) { boost::system::error_code ec; std::size_t bytes_transferred = write(s, static_cast<DynamicBuffer_v2&&>(buffers), transfer_all(), ec); boost::asio::detail::throw_error(ec, "write"); return bytes_transferred; } template <typename SyncWriteStream, typename DynamicBuffer_v2> inline std::size_t write(SyncWriteStream& s, DynamicBuffer_v2 buffers, boost::system::error_code& ec, constraint_t< is_dynamic_buffer_v2<DynamicBuffer_v2>::value >) { return write(s, static_cast<DynamicBuffer_v2&&>(buffers), transfer_all(), ec); } template <typename SyncWriteStream, typename DynamicBuffer_v2, typename CompletionCondition> inline std::size_t write(SyncWriteStream& s, DynamicBuffer_v2 buffers, CompletionCondition completion_condition, constraint_t< is_dynamic_buffer_v2<DynamicBuffer_v2>::value >) { boost::system::error_code ec; std::size_t bytes_transferred = write(s, static_cast<DynamicBuffer_v2&&>(buffers), static_cast<CompletionCondition&&>(completion_condition), ec); boost::asio::detail::throw_error(ec, "write"); return bytes_transferred; } namespace detail { template <typename AsyncWriteStream, typename ConstBufferSequence, typename ConstBufferIterator, typename CompletionCondition, typename WriteHandler> class write_op : public base_from_cancellation_state<WriteHandler>, base_from_completion_cond<CompletionCondition> { public: write_op(AsyncWriteStream& stream, const ConstBufferSequence& buffers, CompletionCondition& completion_condition, WriteHandler& handler) : base_from_cancellation_state<WriteHandler>( handler, enable_partial_cancellation()), base_from_completion_cond<CompletionCondition>(completion_condition), stream_(stream), buffers_(buffers), start_(0), handler_(static_cast<WriteHandler&&>(handler)) { } write_op(const write_op& other) : base_from_cancellation_state<WriteHandler>(other), base_from_completion_cond<CompletionCondition>(other), stream_(other.stream_), buffers_(other.buffers_), start_(other.start_), handler_(other.handler_) { } write_op(write_op&& other) : base_from_cancellation_state<WriteHandler>( static_cast<base_from_cancellation_state<WriteHandler>&&>(other)), base_from_completion_cond<CompletionCondition>( static_cast<base_from_completion_cond<CompletionCondition>&&>(other)), stream_(other.stream_), buffers_(static_cast<buffers_type&&>(other.buffers_)), start_(other.start_), handler_(static_cast<WriteHandler&&>(other.handler_)) { } void operator()(boost::system::error_code ec, std::size_t bytes_transferred, int start = 0) { std::size_t max_size; switch (start_ = start) { case 1: max_size = this->check_for_completion(ec, buffers_.total_consumed()); for (;;) { { BOOST_ASIO_HANDLER_LOCATION((__FILE__, __LINE__, "async_write")); stream_.async_write_some(buffers_.prepare(max_size), static_cast<write_op&&>(*this)); } return; default: buffers_.consume(bytes_transferred); if ((!ec && bytes_transferred == 0) || buffers_.empty()) break; max_size = this->check_for_completion(ec, buffers_.total_consumed()); if (max_size == 0) break; if (this->cancelled() != cancellation_type::none) { ec = error::operation_aborted; break; } } static_cast<WriteHandler&&>(handler_)( static_cast<const boost::system::error_code&>(ec), static_cast<const std::size_t&>(buffers_.total_consumed())); } } //private: typedef boost::asio::detail::consuming_buffers<const_buffer, ConstBufferSequence, ConstBufferIterator> buffers_type; AsyncWriteStream& stream_; buffers_type buffers_; int start_; WriteHandler handler_; }; template <typename AsyncWriteStream, typename ConstBufferSequence, typename ConstBufferIterator, typename CompletionCondition, typename WriteHandler> inline bool asio_handler_is_continuation( write_op<AsyncWriteStream, ConstBufferSequence, ConstBufferIterator, CompletionCondition, WriteHandler>* this_handler) { return this_handler->start_ == 0 ? true : boost_asio_handler_cont_helpers::is_continuation( this_handler->handler_); } template <typename AsyncWriteStream, typename ConstBufferSequence, typename ConstBufferIterator, typename CompletionCondition, typename WriteHandler> inline void start_write_op(AsyncWriteStream& stream, const ConstBufferSequence& buffers, const ConstBufferIterator&, CompletionCondition& completion_condition, WriteHandler& handler) { detail::write_op<AsyncWriteStream, ConstBufferSequence, ConstBufferIterator, CompletionCondition, WriteHandler>( stream, buffers, completion_condition, handler)( boost::system::error_code(), 0, 1); } template <typename AsyncWriteStream> class initiate_async_write { public: typedef typename AsyncWriteStream::executor_type executor_type; explicit initiate_async_write(AsyncWriteStream& stream) : stream_(stream) { } executor_type get_executor() const noexcept { return stream_.get_executor(); } template <typename WriteHandler, typename ConstBufferSequence, typename CompletionCondition> void operator()(WriteHandler&& handler, const ConstBufferSequence& buffers, CompletionCondition&& completion_cond) const { // 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; non_const_lvalue<WriteHandler> handler2(handler); non_const_lvalue<CompletionCondition> completion_cond2(completion_cond); start_write_op(stream_, buffers, boost::asio::buffer_sequence_begin(buffers), completion_cond2.value, handler2.value); } private: AsyncWriteStream& stream_; }; } // namespace detail #if !defined(GENERATING_DOCUMENTATION) template <template <typename, typename> class Associator, typename AsyncWriteStream, typename ConstBufferSequence, typename ConstBufferIterator, typename CompletionCondition, typename WriteHandler, typename DefaultCandidate> struct associator<Associator, detail::write_op<AsyncWriteStream, ConstBufferSequence, ConstBufferIterator, CompletionCondition, WriteHandler>, DefaultCandidate> : Associator<WriteHandler, DefaultCandidate> { static typename Associator<WriteHandler, DefaultCandidate>::type get( const detail::write_op<AsyncWriteStream, ConstBufferSequence, ConstBufferIterator, CompletionCondition, WriteHandler>& h) noexcept { return Associator<WriteHandler, DefaultCandidate>::get(h.handler_); } static auto get( const detail::write_op<AsyncWriteStream, ConstBufferSequence, ConstBufferIterator, CompletionCondition, WriteHandler>& h, const DefaultCandidate& c) noexcept -> decltype(Associator<WriteHandler, DefaultCandidate>::get(h.handler_, c)) { return Associator<WriteHandler, DefaultCandidate>::get(h.handler_, c); } }; #endif // !defined(GENERATING_DOCUMENTATION) template <typename AsyncWriteStream, typename ConstBufferSequence, typename CompletionCondition, BOOST_ASIO_COMPLETION_TOKEN_FOR(void (boost::system::error_code, std::size_t)) WriteToken> inline auto async_write(AsyncWriteStream& s, const ConstBufferSequence& buffers, CompletionCondition completion_condition, WriteToken&& token, constraint_t< is_const_buffer_sequence<ConstBufferSequence>::value >) -> decltype( async_initiate<WriteToken, void (boost::system::error_code, std::size_t)>( declval<detail::initiate_async_write<AsyncWriteStream>>(), token, buffers, static_cast<CompletionCondition&&>(completion_condition))) { return async_initiate<WriteToken, void (boost::system::error_code, std::size_t)>( detail::initiate_async_write<AsyncWriteStream>(s), token, buffers, static_cast<CompletionCondition&&>(completion_condition)); } template <typename AsyncWriteStream, typename ConstBufferSequence, BOOST_ASIO_COMPLETION_TOKEN_FOR(void (boost::system::error_code, std::size_t)) WriteToken> inline auto async_write(AsyncWriteStream& s, const ConstBufferSequence& buffers, WriteToken&& token, constraint_t< is_const_buffer_sequence<ConstBufferSequence>::value >) -> decltype( async_initiate<WriteToken, void (boost::system::error_code, std::size_t)>( declval<detail::initiate_async_write<AsyncWriteStream>>(), token, buffers, transfer_all())) { return async_initiate<WriteToken, void (boost::system::error_code, std::size_t)>( detail::initiate_async_write<AsyncWriteStream>(s), token, buffers, transfer_all()); } #if !defined(BOOST_ASIO_NO_DYNAMIC_BUFFER_V1) namespace detail { template <typename AsyncWriteStream, typename DynamicBuffer_v1, typename CompletionCondition, typename WriteHandler> class write_dynbuf_v1_op { public: template <typename BufferSequence> write_dynbuf_v1_op(AsyncWriteStream& stream, BufferSequence&& buffers, CompletionCondition& completion_condition, WriteHandler& handler) : stream_(stream), buffers_(static_cast<BufferSequence&&>(buffers)), completion_condition_( static_cast<CompletionCondition&&>(completion_condition)), handler_(static_cast<WriteHandler&&>(handler)) { } write_dynbuf_v1_op(const write_dynbuf_v1_op& other) : stream_(other.stream_), buffers_(other.buffers_), completion_condition_(other.completion_condition_), handler_(other.handler_) { } write_dynbuf_v1_op(write_dynbuf_v1_op&& other) : stream_(other.stream_), buffers_(static_cast<DynamicBuffer_v1&&>(other.buffers_)), completion_condition_( static_cast<CompletionCondition&&>( other.completion_condition_)), handler_(static_cast<WriteHandler&&>(other.handler_)) { } void operator()(const boost::system::error_code& ec, std::size_t bytes_transferred, int start = 0) { switch (start) { case 1: async_write(stream_, buffers_.data(), static_cast<CompletionCondition&&>(completion_condition_), static_cast<write_dynbuf_v1_op&&>(*this)); return; default: buffers_.consume(bytes_transferred); static_cast<WriteHandler&&>(handler_)(ec, static_cast<const std::size_t&>(bytes_transferred)); } } //private: AsyncWriteStream& stream_; DynamicBuffer_v1 buffers_; CompletionCondition completion_condition_; WriteHandler handler_; }; template <typename AsyncWriteStream, typename DynamicBuffer_v1, typename CompletionCondition, typename WriteHandler> inline bool asio_handler_is_continuation( write_dynbuf_v1_op<AsyncWriteStream, DynamicBuffer_v1, CompletionCondition, WriteHandler>* this_handler) { return boost_asio_handler_cont_helpers::is_continuation( this_handler->handler_); } template <typename AsyncWriteStream> class initiate_async_write_dynbuf_v1 { public: typedef typename AsyncWriteStream::executor_type executor_type; explicit initiate_async_write_dynbuf_v1(AsyncWriteStream& stream) : stream_(stream) { } executor_type get_executor() const noexcept { return stream_.get_executor(); } template <typename WriteHandler, typename DynamicBuffer_v1, typename CompletionCondition> void operator()(WriteHandler&& handler, DynamicBuffer_v1&& buffers, CompletionCondition&& completion_cond) const { // 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; non_const_lvalue<WriteHandler> handler2(handler); non_const_lvalue<CompletionCondition> completion_cond2(completion_cond); write_dynbuf_v1_op<AsyncWriteStream, decay_t<DynamicBuffer_v1>, CompletionCondition, decay_t<WriteHandler>>( stream_, static_cast<DynamicBuffer_v1&&>(buffers), completion_cond2.value, handler2.value)( boost::system::error_code(), 0, 1); } private: AsyncWriteStream& stream_; }; } // namespace detail #if !defined(GENERATING_DOCUMENTATION) template <template <typename, typename> class Associator, typename AsyncWriteStream, typename DynamicBuffer_v1, typename CompletionCondition, typename WriteHandler, typename DefaultCandidate> struct associator<Associator, detail::write_dynbuf_v1_op<AsyncWriteStream, DynamicBuffer_v1, CompletionCondition, WriteHandler>, DefaultCandidate> : Associator<WriteHandler, DefaultCandidate> { static typename Associator<WriteHandler, DefaultCandidate>::type get( const detail::write_dynbuf_v1_op<AsyncWriteStream, DynamicBuffer_v1, CompletionCondition, WriteHandler>& h) noexcept { return Associator<WriteHandler, DefaultCandidate>::get(h.handler_); } static auto get( const detail::write_dynbuf_v1_op<AsyncWriteStream, DynamicBuffer_v1, CompletionCondition, WriteHandler>& h, const DefaultCandidate& c) noexcept -> decltype(Associator<WriteHandler, DefaultCandidate>::get(h.handler_, c)) { return Associator<WriteHandler, DefaultCandidate>::get(h.handler_, c); } }; #endif // !defined(GENERATING_DOCUMENTATION) template <typename AsyncWriteStream, typename DynamicBuffer_v1, BOOST_ASIO_COMPLETION_TOKEN_FOR(void (boost::system::error_code, std::size_t)) WriteToken> inline auto async_write(AsyncWriteStream& s, DynamicBuffer_v1&& buffers, WriteToken&& token, constraint_t< is_dynamic_buffer_v1<decay_t<DynamicBuffer_v1>>::value >, constraint_t< !is_dynamic_buffer_v2<decay_t<DynamicBuffer_v1>>::value >) -> decltype( async_initiate<WriteToken, void (boost::system::error_code, std::size_t)>( declval<detail::initiate_async_write_dynbuf_v1<AsyncWriteStream>>(), token, static_cast<DynamicBuffer_v1&&>(buffers), transfer_all())) { return async_initiate<WriteToken, void (boost::system::error_code, std::size_t)>( detail::initiate_async_write_dynbuf_v1<AsyncWriteStream>(s), token, static_cast<DynamicBuffer_v1&&>(buffers), transfer_all()); } template <typename AsyncWriteStream, typename DynamicBuffer_v1, typename CompletionCondition, BOOST_ASIO_COMPLETION_TOKEN_FOR(void (boost::system::error_code, std::size_t)) WriteToken> inline auto async_write(AsyncWriteStream& s, DynamicBuffer_v1&& buffers, CompletionCondition completion_condition, WriteToken&& token, constraint_t< is_dynamic_buffer_v1<decay_t<DynamicBuffer_v1>>::value >, constraint_t< !is_dynamic_buffer_v2<decay_t<DynamicBuffer_v1>>::value >) -> decltype( async_initiate<WriteToken, void (boost::system::error_code, std::size_t)>( declval<detail::initiate_async_write_dynbuf_v1<AsyncWriteStream>>(), token, static_cast<DynamicBuffer_v1&&>(buffers), static_cast<CompletionCondition&&>(completion_condition))) { return async_initiate<WriteToken, void (boost::system::error_code, std::size_t)>( detail::initiate_async_write_dynbuf_v1<AsyncWriteStream>(s), token, static_cast<DynamicBuffer_v1&&>(buffers), static_cast<CompletionCondition&&>(completion_condition)); } #if !defined(BOOST_ASIO_NO_EXTENSIONS) #if !defined(BOOST_ASIO_NO_IOSTREAM) template <typename AsyncWriteStream, typename Allocator, BOOST_ASIO_COMPLETION_TOKEN_FOR(void (boost::system::error_code, std::size_t)) WriteToken> inline auto async_write(AsyncWriteStream& s, boost::asio::basic_streambuf<Allocator>& b, WriteToken&& token) -> decltype( async_initiate<WriteToken, void (boost::system::error_code, std::size_t)>( declval<detail::initiate_async_write_dynbuf_v1<AsyncWriteStream>>(), token, basic_streambuf_ref<Allocator>(b), transfer_all())) { return async_initiate<WriteToken, void (boost::system::error_code, std::size_t)>( detail::initiate_async_write_dynbuf_v1<AsyncWriteStream>(s), token, basic_streambuf_ref<Allocator>(b), transfer_all()); } template <typename AsyncWriteStream, typename Allocator, typename CompletionCondition, BOOST_ASIO_COMPLETION_TOKEN_FOR(void (boost::system::error_code, std::size_t)) WriteToken> inline auto async_write(AsyncWriteStream& s, boost::asio::basic_streambuf<Allocator>& b, CompletionCondition completion_condition, WriteToken&& token) -> decltype( async_initiate<WriteToken, void (boost::system::error_code, std::size_t)>( declval<detail::initiate_async_write_dynbuf_v1<AsyncWriteStream>>(), token, basic_streambuf_ref<Allocator>(b), static_cast<CompletionCondition&&>(completion_condition))) { return async_initiate<WriteToken, void (boost::system::error_code, std::size_t)>( detail::initiate_async_write_dynbuf_v1<AsyncWriteStream>(s), token, basic_streambuf_ref<Allocator>(b), static_cast<CompletionCondition&&>(completion_condition)); } #endif // !defined(BOOST_ASIO_NO_IOSTREAM) #endif // !defined(BOOST_ASIO_NO_EXTENSIONS) #endif // !defined(BOOST_ASIO_NO_DYNAMIC_BUFFER_V1) namespace detail { template <typename AsyncWriteStream, typename DynamicBuffer_v2, typename CompletionCondition, typename WriteHandler> class write_dynbuf_v2_op { public: template <typename BufferSequence> write_dynbuf_v2_op(AsyncWriteStream& stream, BufferSequence&& buffers, CompletionCondition& completion_condition, WriteHandler& handler) : stream_(stream), buffers_(static_cast<BufferSequence&&>(buffers)), completion_condition_( static_cast<CompletionCondition&&>(completion_condition)), handler_(static_cast<WriteHandler&&>(handler)) { } write_dynbuf_v2_op(const write_dynbuf_v2_op& other) : stream_(other.stream_), buffers_(other.buffers_), completion_condition_(other.completion_condition_), handler_(other.handler_) { } write_dynbuf_v2_op(write_dynbuf_v2_op&& other) : stream_(other.stream_), buffers_(static_cast<DynamicBuffer_v2&&>(other.buffers_)), completion_condition_( static_cast<CompletionCondition&&>( other.completion_condition_)), handler_(static_cast<WriteHandler&&>(other.handler_)) { } void operator()(const boost::system::error_code& ec, std::size_t bytes_transferred, int start = 0) { switch (start) { case 1: async_write(stream_, buffers_.data(0, buffers_.size()), static_cast<CompletionCondition&&>(completion_condition_), static_cast<write_dynbuf_v2_op&&>(*this)); return; default: buffers_.consume(bytes_transferred); static_cast<WriteHandler&&>(handler_)(ec, static_cast<const std::size_t&>(bytes_transferred)); } } //private: AsyncWriteStream& stream_; DynamicBuffer_v2 buffers_; CompletionCondition completion_condition_; WriteHandler handler_; }; template <typename AsyncWriteStream, typename DynamicBuffer_v2, typename CompletionCondition, typename WriteHandler> inline bool asio_handler_is_continuation( write_dynbuf_v2_op<AsyncWriteStream, DynamicBuffer_v2, CompletionCondition, WriteHandler>* this_handler) { return boost_asio_handler_cont_helpers::is_continuation( this_handler->handler_); } template <typename AsyncWriteStream> class initiate_async_write_dynbuf_v2 { public: typedef typename AsyncWriteStream::executor_type executor_type; explicit initiate_async_write_dynbuf_v2(AsyncWriteStream& stream) : stream_(stream) { } executor_type get_executor() const noexcept { return stream_.get_executor(); } template <typename WriteHandler, typename DynamicBuffer_v2, typename CompletionCondition> void operator()(WriteHandler&& handler, DynamicBuffer_v2&& buffers, CompletionCondition&& completion_cond) const { // 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; non_const_lvalue<WriteHandler> handler2(handler); non_const_lvalue<CompletionCondition> completion_cond2(completion_cond); write_dynbuf_v2_op<AsyncWriteStream, decay_t<DynamicBuffer_v2>, CompletionCondition, decay_t<WriteHandler>>( stream_, static_cast<DynamicBuffer_v2&&>(buffers), completion_cond2.value, handler2.value)( boost::system::error_code(), 0, 1); } private: AsyncWriteStream& stream_; }; } // namespace detail #if !defined(GENERATING_DOCUMENTATION) template <template <typename, typename> class Associator, typename AsyncWriteStream, typename DynamicBuffer_v2, typename CompletionCondition, typename WriteHandler, typename DefaultCandidate> struct associator<Associator, detail::write_dynbuf_v2_op<AsyncWriteStream, DynamicBuffer_v2, CompletionCondition, WriteHandler>, DefaultCandidate> : Associator<WriteHandler, DefaultCandidate> { static typename Associator<WriteHandler, DefaultCandidate>::type get( const detail::write_dynbuf_v2_op<AsyncWriteStream, DynamicBuffer_v2, CompletionCondition, WriteHandler>& h) noexcept { return Associator<WriteHandler, DefaultCandidate>::get(h.handler_); } static auto get( const detail::write_dynbuf_v2_op<AsyncWriteStream, DynamicBuffer_v2, CompletionCondition, WriteHandler>& h, const DefaultCandidate& c) noexcept -> decltype(Associator<WriteHandler, DefaultCandidate>::get(h.handler_, c)) { return Associator<WriteHandler, DefaultCandidate>::get(h.handler_, c); } }; #endif // !defined(GENERATING_DOCUMENTATION) template <typename AsyncWriteStream, typename DynamicBuffer_v2, BOOST_ASIO_COMPLETION_TOKEN_FOR(void (boost::system::error_code, std::size_t)) WriteToken> inline auto async_write(AsyncWriteStream& s, DynamicBuffer_v2 buffers, WriteToken&& token, constraint_t< is_dynamic_buffer_v2<DynamicBuffer_v2>::value >) -> decltype( async_initiate<WriteToken, void (boost::system::error_code, std::size_t)>( declval<detail::initiate_async_write_dynbuf_v2<AsyncWriteStream>>(), token, static_cast<DynamicBuffer_v2&&>(buffers), transfer_all())) { return async_initiate<WriteToken, void (boost::system::error_code, std::size_t)>( detail::initiate_async_write_dynbuf_v2<AsyncWriteStream>(s), token, static_cast<DynamicBuffer_v2&&>(buffers), transfer_all()); } template <typename AsyncWriteStream, typename DynamicBuffer_v2, typename CompletionCondition, BOOST_ASIO_COMPLETION_TOKEN_FOR(void (boost::system::error_code, std::size_t)) WriteToken> inline auto async_write(AsyncWriteStream& s, DynamicBuffer_v2 buffers, CompletionCondition completion_condition, WriteToken&& token, constraint_t< is_dynamic_buffer_v2<DynamicBuffer_v2>::value >) -> decltype( async_initiate<WriteToken, void (boost::system::error_code, std::size_t)>( declval<detail::initiate_async_write_dynbuf_v2<AsyncWriteStream>>(), token, static_cast<DynamicBuffer_v2&&>(buffers), static_cast<CompletionCondition&&>(completion_condition))) { return async_initiate<WriteToken, void (boost::system::error_code, std::size_t)>( detail::initiate_async_write_dynbuf_v2<AsyncWriteStream>(s), token, static_cast<DynamicBuffer_v2&&>(buffers), static_cast<CompletionCondition&&>(completion_condition)); } } // namespace asio } // namespace boost #include <boost/asio/detail/pop_options.hpp> #endif // BOOST_ASIO_IMPL_WRITE_HPP