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Diffstat (limited to 'boost/asio/impl/buffered_write_stream.hpp')
| -rw-r--r-- | boost/asio/impl/buffered_write_stream.hpp | 340 |
1 files changed, 340 insertions, 0 deletions
diff --git a/boost/asio/impl/buffered_write_stream.hpp b/boost/asio/impl/buffered_write_stream.hpp new file mode 100644 index 0000000000..65012088e5 --- /dev/null +++ b/boost/asio/impl/buffered_write_stream.hpp @@ -0,0 +1,340 @@ +// +// impl/buffered_write_stream.hpp +// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +// +// Copyright (c) 2003-2014 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_BUFFERED_WRITE_STREAM_HPP +#define BOOST_ASIO_IMPL_BUFFERED_WRITE_STREAM_HPP + +#if defined(_MSC_VER) && (_MSC_VER >= 1200) +# pragma once +#endif // defined(_MSC_VER) && (_MSC_VER >= 1200) + +#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/push_options.hpp> + +namespace boost { +namespace asio { + +template <typename Stream> +std::size_t buffered_write_stream<Stream>::flush() +{ + std::size_t bytes_written = write(next_layer_, + buffer(storage_.data(), storage_.size())); + storage_.consume(bytes_written); + return bytes_written; +} + +template <typename Stream> +std::size_t buffered_write_stream<Stream>::flush(boost::system::error_code& ec) +{ + std::size_t bytes_written = write(next_layer_, + buffer(storage_.data(), storage_.size()), + transfer_all(), ec); + storage_.consume(bytes_written); + return bytes_written; +} + +namespace detail +{ + template <typename WriteHandler> + class buffered_flush_handler + { + public: + buffered_flush_handler(detail::buffered_stream_storage& storage, + WriteHandler& handler) + : storage_(storage), + handler_(handler) + { + } + +#if defined(BOOST_ASIO_HAS_MOVE) + buffered_flush_handler(const buffered_flush_handler& other) + : storage_(other.storage_), + handler_(other.handler_) + { + } + + buffered_flush_handler(buffered_flush_handler&& other) + : storage_(other.storage_), + handler_(BOOST_ASIO_MOVE_CAST(WriteHandler)(other.handler_)) + { + } +#endif // defined(BOOST_ASIO_HAS_MOVE) + + void operator()(const boost::system::error_code& ec, + const std::size_t bytes_written) + { + storage_.consume(bytes_written); + handler_(ec, bytes_written); + } + + //private: + detail::buffered_stream_storage& storage_; + WriteHandler handler_; + }; + + template <typename WriteHandler> + inline void* asio_handler_allocate(std::size_t size, + buffered_flush_handler<WriteHandler>* this_handler) + { + return boost_asio_handler_alloc_helpers::allocate( + size, this_handler->handler_); + } + + template <typename WriteHandler> + inline void asio_handler_deallocate(void* pointer, std::size_t size, + buffered_flush_handler<WriteHandler>* this_handler) + { + boost_asio_handler_alloc_helpers::deallocate( + pointer, size, this_handler->handler_); + } + + template <typename WriteHandler> + inline bool asio_handler_is_continuation( + buffered_flush_handler<WriteHandler>* this_handler) + { + return boost_asio_handler_cont_helpers::is_continuation( + this_handler->handler_); + } + + template <typename Function, typename WriteHandler> + inline void asio_handler_invoke(Function& function, + buffered_flush_handler<WriteHandler>* this_handler) + { + boost_asio_handler_invoke_helpers::invoke( + function, this_handler->handler_); + } + + template <typename Function, typename WriteHandler> + inline void asio_handler_invoke(const Function& function, + buffered_flush_handler<WriteHandler>* this_handler) + { + boost_asio_handler_invoke_helpers::invoke( + function, this_handler->handler_); + } +} + +template <typename Stream> +template <typename WriteHandler> +BOOST_ASIO_INITFN_RESULT_TYPE(WriteHandler, + void (boost::system::error_code, std::size_t)) +buffered_write_stream<Stream>::async_flush( + BOOST_ASIO_MOVE_ARG(WriteHandler) handler) +{ + // If you get an error on the following line it means that your handler does + // not meet the documented type requirements for a WriteHandler. + BOOST_ASIO_WRITE_HANDLER_CHECK(WriteHandler, handler) type_check; + + detail::async_result_init< + WriteHandler, void (boost::system::error_code, std::size_t)> init( + BOOST_ASIO_MOVE_CAST(WriteHandler)(handler)); + + async_write(next_layer_, buffer(storage_.data(), storage_.size()), + detail::buffered_flush_handler<BOOST_ASIO_HANDLER_TYPE( + WriteHandler, void (boost::system::error_code, std::size_t))>( + storage_, init.handler)); + + return init.result.get(); +} + +template <typename Stream> +template <typename ConstBufferSequence> +std::size_t buffered_write_stream<Stream>::write_some( + const ConstBufferSequence& buffers) +{ + if (boost::asio::buffer_size(buffers) == 0) + return 0; + + if (storage_.size() == storage_.capacity()) + this->flush(); + + return this->copy(buffers); +} + +template <typename Stream> +template <typename ConstBufferSequence> +std::size_t buffered_write_stream<Stream>::write_some( + const ConstBufferSequence& buffers, boost::system::error_code& ec) +{ + ec = boost::system::error_code(); + + if (boost::asio::buffer_size(buffers) == 0) + return 0; + + if (storage_.size() == storage_.capacity() && !flush(ec)) + return 0; + + return this->copy(buffers); +} + +namespace detail +{ + template <typename ConstBufferSequence, typename WriteHandler> + class buffered_write_some_handler + { + public: + buffered_write_some_handler(detail::buffered_stream_storage& storage, + const ConstBufferSequence& buffers, WriteHandler& handler) + : storage_(storage), + buffers_(buffers), + handler_(handler) + { + } + +#if defined(BOOST_ASIO_HAS_MOVE) + buffered_write_some_handler(const buffered_write_some_handler& other) + : storage_(other.storage_), + buffers_(other.buffers_), + handler_(other.handler_) + { + } + + buffered_write_some_handler(buffered_write_some_handler&& other) + : storage_(other.storage_), + buffers_(other.buffers_), + 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) + { + if (ec) + { + const std::size_t length = 0; + handler_(ec, length); + } + else + { + std::size_t orig_size = storage_.size(); + std::size_t space_avail = storage_.capacity() - orig_size; + std::size_t bytes_avail = boost::asio::buffer_size(buffers_); + std::size_t length = bytes_avail < space_avail + ? bytes_avail : space_avail; + storage_.resize(orig_size + length); + const std::size_t bytes_copied = boost::asio::buffer_copy( + storage_.data() + orig_size, buffers_, length); + handler_(ec, bytes_copied); + } + } + + //private: + detail::buffered_stream_storage& storage_; + ConstBufferSequence buffers_; + WriteHandler handler_; + }; + + template <typename ConstBufferSequence, typename WriteHandler> + inline void* asio_handler_allocate(std::size_t size, + buffered_write_some_handler< + ConstBufferSequence, WriteHandler>* this_handler) + { + return boost_asio_handler_alloc_helpers::allocate( + size, this_handler->handler_); + } + + template <typename ConstBufferSequence, typename WriteHandler> + inline void asio_handler_deallocate(void* pointer, std::size_t size, + buffered_write_some_handler< + ConstBufferSequence, WriteHandler>* this_handler) + { + boost_asio_handler_alloc_helpers::deallocate( + pointer, size, this_handler->handler_); + } + + template <typename ConstBufferSequence, typename WriteHandler> + inline bool asio_handler_is_continuation( + buffered_write_some_handler< + ConstBufferSequence, WriteHandler>* this_handler) + { + return boost_asio_handler_cont_helpers::is_continuation( + this_handler->handler_); + } + + template <typename Function, typename ConstBufferSequence, + typename WriteHandler> + inline void asio_handler_invoke(Function& function, + buffered_write_some_handler< + ConstBufferSequence, WriteHandler>* this_handler) + { + boost_asio_handler_invoke_helpers::invoke( + function, this_handler->handler_); + } + + template <typename Function, typename ConstBufferSequence, + typename WriteHandler> + inline void asio_handler_invoke(const Function& function, + buffered_write_some_handler< + ConstBufferSequence, WriteHandler>* this_handler) + { + boost_asio_handler_invoke_helpers::invoke( + function, this_handler->handler_); + } +} // namespace detail + +template <typename Stream> +template <typename ConstBufferSequence, typename WriteHandler> +BOOST_ASIO_INITFN_RESULT_TYPE(WriteHandler, + void (boost::system::error_code, std::size_t)) +buffered_write_stream<Stream>::async_write_some( + const ConstBufferSequence& buffers, + BOOST_ASIO_MOVE_ARG(WriteHandler) handler) +{ + // If you get an error on the following line it means that your handler does + // not meet the documented type requirements for a WriteHandler. + BOOST_ASIO_WRITE_HANDLER_CHECK(WriteHandler, handler) type_check; + + detail::async_result_init< + WriteHandler, void (boost::system::error_code, std::size_t)> init( + BOOST_ASIO_MOVE_CAST(WriteHandler)(handler)); + + if (boost::asio::buffer_size(buffers) == 0 + || storage_.size() < storage_.capacity()) + { + next_layer_.async_write_some(boost::asio::const_buffers_1(0, 0), + detail::buffered_write_some_handler< + ConstBufferSequence, BOOST_ASIO_HANDLER_TYPE( + WriteHandler, void (boost::system::error_code, std::size_t))>( + storage_, buffers, init.handler)); + } + else + { + this->async_flush(detail::buffered_write_some_handler< + ConstBufferSequence, BOOST_ASIO_HANDLER_TYPE( + WriteHandler, void (boost::system::error_code, std::size_t))>( + storage_, buffers, init.handler)); + } + + return init.result.get(); +} + +template <typename Stream> +template <typename ConstBufferSequence> +std::size_t buffered_write_stream<Stream>::copy( + const ConstBufferSequence& buffers) +{ + std::size_t orig_size = storage_.size(); + std::size_t space_avail = storage_.capacity() - orig_size; + std::size_t bytes_avail = boost::asio::buffer_size(buffers); + std::size_t length = bytes_avail < space_avail ? bytes_avail : space_avail; + storage_.resize(orig_size + length); + return boost::asio::buffer_copy( + storage_.data() + orig_size, buffers, length); +} + +} // namespace asio +} // namespace boost + +#include <boost/asio/detail/pop_options.hpp> + +#endif // BOOST_ASIO_IMPL_BUFFERED_WRITE_STREAM_HPP |