boost/asio/impl/write.hpp
// // impl/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 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/associated_allocator.hpp> #include <boost/asio/associated_executor.hpp> #include <boost/asio/buffer.hpp> #include <boost/asio/completion_condition.hpp> #include <boost/asio/detail/array_fwd.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_alloc_helpers.hpp> #include <boost/asio/detail/handler_cont_helpers.hpp> #include <boost/asio/detail/handler_invoke_helpers.hpp> #include <boost/asio/detail/handler_type_requirements.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_buffer_sequence(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, typename enable_if< is_const_buffer_sequence<ConstBufferSequence>::value >::type*) { return detail::write_buffer_sequence(s, buffers, boost::asio::buffer_sequence_begin(buffers), completion_condition, ec); } template <typename SyncWriteStream, typename ConstBufferSequence> inline std::size_t write(SyncWriteStream& s, const ConstBufferSequence& buffers, typename enable_if< is_const_buffer_sequence<ConstBufferSequence>::value >::type*) { 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, typename enable_if< is_const_buffer_sequence<ConstBufferSequence>::value >::type*) { 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, typename enable_if< is_const_buffer_sequence<ConstBufferSequence>::value >::type*) { boost::system::error_code ec; std::size_t bytes_transferred = write(s, buffers, completion_condition, ec); boost::asio::detail::throw_error(ec, "write"); return bytes_transferred; } template <typename SyncWriteStream, typename DynamicBuffer, typename CompletionCondition> std::size_t write(SyncWriteStream& s, BOOST_ASIO_MOVE_ARG(DynamicBuffer) buffers, CompletionCondition completion_condition, boost::system::error_code& ec, typename enable_if< is_dynamic_buffer<typename decay<DynamicBuffer>::type>::value >::type*) { typename decay<DynamicBuffer>::type b( BOOST_ASIO_MOVE_CAST(DynamicBuffer)(buffers)); std::size_t bytes_transferred = write(s, b.data(), completion_condition, ec); b.consume(bytes_transferred); return bytes_transferred; } template <typename SyncWriteStream, typename DynamicBuffer> inline std::size_t write(SyncWriteStream& s, BOOST_ASIO_MOVE_ARG(DynamicBuffer) buffers, typename enable_if< is_dynamic_buffer<typename decay<DynamicBuffer>::type>::value >::type*) { boost::system::error_code ec; std::size_t bytes_transferred = write(s, BOOST_ASIO_MOVE_CAST(DynamicBuffer)(buffers), transfer_all(), ec); boost::asio::detail::throw_error(ec, "write"); return bytes_transferred; } template <typename SyncWriteStream, typename DynamicBuffer> inline std::size_t write(SyncWriteStream& s, BOOST_ASIO_MOVE_ARG(DynamicBuffer) buffers, boost::system::error_code& ec, typename enable_if< is_dynamic_buffer<typename decay<DynamicBuffer>::type>::value >::type*) { return write(s, BOOST_ASIO_MOVE_CAST(DynamicBuffer)(buffers), transfer_all(), ec); } template <typename SyncWriteStream, typename DynamicBuffer, typename CompletionCondition> inline std::size_t write(SyncWriteStream& s, BOOST_ASIO_MOVE_ARG(DynamicBuffer) buffers, CompletionCondition completion_condition, typename enable_if< is_dynamic_buffer<typename decay<DynamicBuffer>::type>::value >::type*) { boost::system::error_code ec; std::size_t bytes_transferred = write(s, BOOST_ASIO_MOVE_CAST(DynamicBuffer)(buffers), 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), 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), completion_condition); } #endif // !defined(BOOST_ASIO_NO_IOSTREAM) #endif // !defined(BOOST_ASIO_NO_EXTENSIONS) namespace detail { template <typename AsyncWriteStream, typename ConstBufferSequence, typename ConstBufferIterator, typename CompletionCondition, typename WriteHandler> class write_op : detail::base_from_completion_cond<CompletionCondition> { public: write_op(AsyncWriteStream& stream, const ConstBufferSequence& buffers, CompletionCondition completion_condition, WriteHandler& handler) : detail::base_from_completion_cond< CompletionCondition>(completion_condition), stream_(stream), buffers_(buffers), start_(0), handler_(BOOST_ASIO_MOVE_CAST(WriteHandler)(handler)) { } #if defined(BOOST_ASIO_HAS_MOVE) write_op(const write_op& other) : detail::base_from_completion_cond<CompletionCondition>(other), stream_(other.stream_), buffers_(other.buffers_), start_(other.start_), handler_(other.handler_) { } write_op(write_op&& other) : detail::base_from_completion_cond<CompletionCondition>(other), stream_(other.stream_), buffers_(other.buffers_), start_(other.start_), handler_(BOOST_ASIO_MOVE_CAST(WriteHandler)(other.handler_)) { } #endif // defined(BOOST_ASIO_HAS_MOVE) void operator()(const 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()); do { stream_.async_write_some(buffers_.prepare(max_size), BOOST_ASIO_MOVE_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()); } while (max_size > 0); handler_(ec, buffers_.total_consumed()); } } //private: AsyncWriteStream& stream_; boost::asio::detail::consuming_buffers<const_buffer, ConstBufferSequence, ConstBufferIterator> buffers_; int start_; WriteHandler handler_; }; template <typename AsyncWriteStream, typename ConstBufferSequence, typename ConstBufferIterator, typename CompletionCondition, typename WriteHandler> inline void* asio_handler_allocate(std::size_t size, write_op<AsyncWriteStream, ConstBufferSequence, ConstBufferIterator, CompletionCondition, WriteHandler>* this_handler) { return boost_asio_handler_alloc_helpers::allocate( size, this_handler->handler_); } template <typename AsyncWriteStream, typename ConstBufferSequence, typename ConstBufferIterator, typename CompletionCondition, typename WriteHandler> inline void asio_handler_deallocate(void* pointer, std::size_t size, write_op<AsyncWriteStream, ConstBufferSequence, ConstBufferIterator, CompletionCondition, WriteHandler>* this_handler) { boost_asio_handler_alloc_helpers::deallocate( pointer, size, this_handler->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 Function, typename AsyncWriteStream, typename ConstBufferSequence, typename ConstBufferIterator, typename CompletionCondition, typename WriteHandler> inline void asio_handler_invoke(Function& function, write_op<AsyncWriteStream, ConstBufferSequence, ConstBufferIterator, CompletionCondition, WriteHandler>* this_handler) { boost_asio_handler_invoke_helpers::invoke( function, this_handler->handler_); } template <typename Function, typename AsyncWriteStream, typename ConstBufferSequence, typename ConstBufferIterator, typename CompletionCondition, typename WriteHandler> inline void asio_handler_invoke(const Function& function, write_op<AsyncWriteStream, ConstBufferSequence, ConstBufferIterator, CompletionCondition, WriteHandler>* this_handler) { boost_asio_handler_invoke_helpers::invoke( function, this_handler->handler_); } template <typename AsyncWriteStream, typename ConstBufferSequence, typename ConstBufferIterator, typename CompletionCondition, typename WriteHandler> inline void start_write_buffer_sequence_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); } } // namespace detail #if !defined(GENERATING_DOCUMENTATION) template <typename AsyncWriteStream, typename ConstBufferSequence, typename ConstBufferIterator, typename CompletionCondition, typename WriteHandler, typename Allocator> struct associated_allocator< detail::write_op<AsyncWriteStream, ConstBufferSequence, ConstBufferIterator, CompletionCondition, WriteHandler>, Allocator> { typedef typename associated_allocator<WriteHandler, Allocator>::type type; static type get( const detail::write_op<AsyncWriteStream, ConstBufferSequence, ConstBufferIterator, CompletionCondition, WriteHandler>& h, const Allocator& a = Allocator()) BOOST_ASIO_NOEXCEPT { return associated_allocator<WriteHandler, Allocator>::get(h.handler_, a); } }; template <typename AsyncWriteStream, typename ConstBufferSequence, typename ConstBufferIterator, typename CompletionCondition, typename WriteHandler, typename Executor> struct associated_executor< detail::write_op<AsyncWriteStream, ConstBufferSequence, ConstBufferIterator, CompletionCondition, WriteHandler>, Executor> { typedef typename associated_executor<WriteHandler, Executor>::type type; static type get( const detail::write_op<AsyncWriteStream, ConstBufferSequence, ConstBufferIterator, CompletionCondition, WriteHandler>& h, const Executor& ex = Executor()) BOOST_ASIO_NOEXCEPT { return associated_executor<WriteHandler, Executor>::get(h.handler_, ex); } }; #endif // !defined(GENERATING_DOCUMENTATION) template <typename AsyncWriteStream, typename ConstBufferSequence, typename CompletionCondition, typename WriteHandler> inline BOOST_ASIO_INITFN_RESULT_TYPE(WriteHandler, void (boost::system::error_code, std::size_t)) async_write(AsyncWriteStream& s, const ConstBufferSequence& buffers, CompletionCondition completion_condition, BOOST_ASIO_MOVE_ARG(WriteHandler) handler, typename enable_if< is_const_buffer_sequence<ConstBufferSequence>::value >::type*) { // 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; async_completion<WriteHandler, void (boost::system::error_code, std::size_t)> init(handler); detail::start_write_buffer_sequence_op(s, buffers, boost::asio::buffer_sequence_begin(buffers), completion_condition, init.completion_handler); return init.result.get(); } template <typename AsyncWriteStream, typename ConstBufferSequence, typename WriteHandler> inline BOOST_ASIO_INITFN_RESULT_TYPE(WriteHandler, void (boost::system::error_code, std::size_t)) async_write(AsyncWriteStream& s, const ConstBufferSequence& buffers, BOOST_ASIO_MOVE_ARG(WriteHandler) handler, typename enable_if< is_const_buffer_sequence<ConstBufferSequence>::value >::type*) { // 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; async_completion<WriteHandler, void (boost::system::error_code, std::size_t)> init(handler); detail::start_write_buffer_sequence_op(s, buffers, boost::asio::buffer_sequence_begin(buffers), transfer_all(), init.completion_handler); return init.result.get(); } namespace detail { template <typename AsyncWriteStream, typename DynamicBuffer, typename CompletionCondition, typename WriteHandler> class write_dynbuf_op { public: template <typename BufferSequence> write_dynbuf_op(AsyncWriteStream& stream, BOOST_ASIO_MOVE_ARG(BufferSequence) buffers, CompletionCondition completion_condition, WriteHandler& handler) : stream_(stream), buffers_(BOOST_ASIO_MOVE_CAST(BufferSequence)(buffers)), completion_condition_( BOOST_ASIO_MOVE_CAST(CompletionCondition)(completion_condition)), handler_(BOOST_ASIO_MOVE_CAST(WriteHandler)(handler)) { } #if defined(BOOST_ASIO_HAS_MOVE) write_dynbuf_op(const write_dynbuf_op& other) : stream_(other.stream_), buffers_(other.buffers_), completion_condition_(other.completion_condition_), handler_(other.handler_) { } write_dynbuf_op(write_dynbuf_op&& other) : stream_(other.stream_), buffers_(BOOST_ASIO_MOVE_CAST(DynamicBuffer)(other.buffers_)), completion_condition_( BOOST_ASIO_MOVE_CAST(CompletionCondition)( other.completion_condition_)), handler_(BOOST_ASIO_MOVE_CAST(WriteHandler)(other.handler_)) { } #endif // defined(BOOST_ASIO_HAS_MOVE) 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(), completion_condition_, BOOST_ASIO_MOVE_CAST(write_dynbuf_op)(*this)); return; default: buffers_.consume(bytes_transferred); handler_(ec, static_cast<const std::size_t&>(bytes_transferred)); } } //private: AsyncWriteStream& stream_; DynamicBuffer buffers_; CompletionCondition completion_condition_; WriteHandler handler_; }; template <typename AsyncWriteStream, typename DynamicBuffer, typename CompletionCondition, typename WriteHandler> inline void* asio_handler_allocate(std::size_t size, write_dynbuf_op<AsyncWriteStream, DynamicBuffer, CompletionCondition, WriteHandler>* this_handler) { return boost_asio_handler_alloc_helpers::allocate( size, this_handler->handler_); } template <typename AsyncWriteStream, typename DynamicBuffer, typename CompletionCondition, typename WriteHandler> inline void asio_handler_deallocate(void* pointer, std::size_t size, write_dynbuf_op<AsyncWriteStream, DynamicBuffer, CompletionCondition, WriteHandler>* this_handler) { boost_asio_handler_alloc_helpers::deallocate( pointer, size, this_handler->handler_); } template <typename AsyncWriteStream, typename DynamicBuffer, typename CompletionCondition, typename WriteHandler> inline bool asio_handler_is_continuation( write_dynbuf_op<AsyncWriteStream, DynamicBuffer, CompletionCondition, WriteHandler>* this_handler) { return boost_asio_handler_cont_helpers::is_continuation( this_handler->handler_); } template <typename Function, typename AsyncWriteStream, typename DynamicBuffer, typename CompletionCondition, typename WriteHandler> inline void asio_handler_invoke(Function& function, write_dynbuf_op<AsyncWriteStream, DynamicBuffer, CompletionCondition, WriteHandler>* this_handler) { boost_asio_handler_invoke_helpers::invoke( function, this_handler->handler_); } template <typename Function, typename AsyncWriteStream, typename DynamicBuffer, typename CompletionCondition, typename WriteHandler> inline void asio_handler_invoke(const Function& function, write_dynbuf_op<AsyncWriteStream, DynamicBuffer, CompletionCondition, WriteHandler>* this_handler) { boost_asio_handler_invoke_helpers::invoke( function, this_handler->handler_); } } // namespace detail #if !defined(GENERATING_DOCUMENTATION) template <typename AsyncWriteStream, typename DynamicBuffer, typename CompletionCondition, typename WriteHandler, typename Allocator> struct associated_allocator< detail::write_dynbuf_op<AsyncWriteStream, DynamicBuffer, CompletionCondition, WriteHandler>, Allocator> { typedef typename associated_allocator<WriteHandler, Allocator>::type type; static type get( const detail::write_dynbuf_op<AsyncWriteStream, DynamicBuffer, CompletionCondition, WriteHandler>& h, const Allocator& a = Allocator()) BOOST_ASIO_NOEXCEPT { return associated_allocator<WriteHandler, Allocator>::get(h.handler_, a); } }; template <typename AsyncWriteStream, typename DynamicBuffer, typename CompletionCondition, typename WriteHandler, typename Executor> struct associated_executor< detail::write_dynbuf_op<AsyncWriteStream, DynamicBuffer, CompletionCondition, WriteHandler>, Executor> { typedef typename associated_executor<WriteHandler, Executor>::type type; static type get( const detail::write_dynbuf_op<AsyncWriteStream, DynamicBuffer, CompletionCondition, WriteHandler>& h, const Executor& ex = Executor()) BOOST_ASIO_NOEXCEPT { return associated_executor<WriteHandler, Executor>::get(h.handler_, ex); } }; #endif // !defined(GENERATING_DOCUMENTATION) template <typename AsyncWriteStream, typename DynamicBuffer, typename WriteHandler> inline BOOST_ASIO_INITFN_RESULT_TYPE(WriteHandler, void (boost::system::error_code, std::size_t)) async_write(AsyncWriteStream& s, BOOST_ASIO_MOVE_ARG(DynamicBuffer) buffers, BOOST_ASIO_MOVE_ARG(WriteHandler) handler, typename enable_if< is_dynamic_buffer<typename decay<DynamicBuffer>::type>::value >::type*) { return async_write(s, BOOST_ASIO_MOVE_CAST(DynamicBuffer)(buffers), transfer_all(), BOOST_ASIO_MOVE_CAST(WriteHandler)(handler)); } template <typename AsyncWriteStream, typename DynamicBuffer, typename CompletionCondition, typename WriteHandler> inline BOOST_ASIO_INITFN_RESULT_TYPE(WriteHandler, void (boost::system::error_code, std::size_t)) async_write(AsyncWriteStream& s, BOOST_ASIO_MOVE_ARG(DynamicBuffer) buffers, CompletionCondition completion_condition, BOOST_ASIO_MOVE_ARG(WriteHandler) handler, typename enable_if< is_dynamic_buffer<typename decay<DynamicBuffer>::type>::value >::type*) { // 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; async_completion<WriteHandler, void (boost::system::error_code, std::size_t)> init(handler); detail::write_dynbuf_op<AsyncWriteStream, typename decay<DynamicBuffer>::type, CompletionCondition, BOOST_ASIO_HANDLER_TYPE( WriteHandler, void (boost::system::error_code, std::size_t))>( s, BOOST_ASIO_MOVE_CAST(DynamicBuffer)(buffers), completion_condition, init.completion_handler)( boost::system::error_code(), 0, 1); return init.result.get(); } #if !defined(BOOST_ASIO_NO_EXTENSIONS) #if !defined(BOOST_ASIO_NO_IOSTREAM) template <typename AsyncWriteStream, typename Allocator, typename WriteHandler> inline BOOST_ASIO_INITFN_RESULT_TYPE(WriteHandler, void (boost::system::error_code, std::size_t)) async_write(AsyncWriteStream& s, boost::asio::basic_streambuf<Allocator>& b, BOOST_ASIO_MOVE_ARG(WriteHandler) handler) { return async_write(s, basic_streambuf_ref<Allocator>(b), BOOST_ASIO_MOVE_CAST(WriteHandler)(handler)); } template <typename AsyncWriteStream, typename Allocator, typename CompletionCondition, typename WriteHandler> inline BOOST_ASIO_INITFN_RESULT_TYPE(WriteHandler, void (boost::system::error_code, std::size_t)) async_write(AsyncWriteStream& s, boost::asio::basic_streambuf<Allocator>& b, CompletionCondition completion_condition, BOOST_ASIO_MOVE_ARG(WriteHandler) handler) { return async_write(s, basic_streambuf_ref<Allocator>(b), completion_condition, BOOST_ASIO_MOVE_CAST(WriteHandler)(handler)); } #endif // !defined(BOOST_ASIO_NO_IOSTREAM) #endif // !defined(BOOST_ASIO_NO_EXTENSIONS) } // namespace asio } // namespace boost #include <boost/asio/detail/pop_options.hpp> #endif // BOOST_ASIO_IMPL_WRITE_HPP