| // |
| // detail/descriptor_write_op.hpp |
| // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| // |
| // Copyright (c) 2003-2016 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_DETAIL_DESCRIPTOR_WRITE_OP_HPP |
| #define ASIO_DETAIL_DESCRIPTOR_WRITE_OP_HPP |
| |
| #if defined(_MSC_VER) && (_MSC_VER >= 1200) |
| # pragma once |
| #endif // defined(_MSC_VER) && (_MSC_VER >= 1200) |
| |
| #include "asio/detail/config.hpp" |
| |
| #if !defined(ASIO_WINDOWS) && !defined(__CYGWIN__) |
| |
| #include "asio/detail/bind_handler.hpp" |
| #include "asio/detail/buffer_sequence_adapter.hpp" |
| #include "asio/detail/descriptor_ops.hpp" |
| #include "asio/detail/fenced_block.hpp" |
| #include "asio/detail/handler_work.hpp" |
| #include "asio/detail/memory.hpp" |
| #include "asio/detail/reactor_op.hpp" |
| |
| #include "asio/detail/push_options.hpp" |
| |
| namespace asio { |
| namespace detail { |
| |
| template <typename ConstBufferSequence> |
| class descriptor_write_op_base : public reactor_op |
| { |
| public: |
| descriptor_write_op_base(int descriptor, |
| const ConstBufferSequence& buffers, func_type complete_func) |
| : reactor_op(&descriptor_write_op_base::do_perform, complete_func), |
| descriptor_(descriptor), |
| buffers_(buffers) |
| { |
| } |
| |
| static bool do_perform(reactor_op* base) |
| { |
| descriptor_write_op_base* o(static_cast<descriptor_write_op_base*>(base)); |
| |
| buffer_sequence_adapter<asio::const_buffer, |
| ConstBufferSequence> bufs(o->buffers_); |
| |
| bool result = descriptor_ops::non_blocking_write(o->descriptor_, |
| bufs.buffers(), bufs.count(), o->ec_, o->bytes_transferred_); |
| |
| ASIO_HANDLER_REACTOR_OPERATION((*o, "non_blocking_write", |
| o->ec_, o->bytes_transferred_)); |
| |
| return result; |
| } |
| |
| private: |
| int descriptor_; |
| ConstBufferSequence buffers_; |
| }; |
| |
| template <typename ConstBufferSequence, typename Handler> |
| class descriptor_write_op |
| : public descriptor_write_op_base<ConstBufferSequence> |
| { |
| public: |
| ASIO_DEFINE_HANDLER_PTR(descriptor_write_op); |
| |
| descriptor_write_op(int descriptor, |
| const ConstBufferSequence& buffers, Handler& handler) |
| : descriptor_write_op_base<ConstBufferSequence>( |
| descriptor, buffers, &descriptor_write_op::do_complete), |
| handler_(ASIO_MOVE_CAST(Handler)(handler)) |
| { |
| handler_work<Handler>::start(handler_); |
| } |
| |
| static void do_complete(void* owner, operation* base, |
| const asio::error_code& /*ec*/, |
| std::size_t /*bytes_transferred*/) |
| { |
| // Take ownership of the handler object. |
| descriptor_write_op* o(static_cast<descriptor_write_op*>(base)); |
| ptr p = { asio::detail::addressof(o->handler_), o, o }; |
| handler_work<Handler> w(o->handler_); |
| |
| ASIO_HANDLER_COMPLETION((*o)); |
| |
| // Make a copy of the handler so that the memory can be deallocated before |
| // the upcall is made. Even if we're not about to make an upcall, a |
| // sub-object of the handler may be the true owner of the memory associated |
| // with the handler. Consequently, a local copy of the handler is required |
| // to ensure that any owning sub-object remains valid until after we have |
| // deallocated the memory here. |
| detail::binder2<Handler, asio::error_code, std::size_t> |
| handler(o->handler_, o->ec_, o->bytes_transferred_); |
| p.h = asio::detail::addressof(handler.handler_); |
| p.reset(); |
| |
| // Make the upcall if required. |
| if (owner) |
| { |
| fenced_block b(fenced_block::half); |
| ASIO_HANDLER_INVOCATION_BEGIN((handler.arg1_, handler.arg2_)); |
| w.complete(handler, handler.handler_); |
| ASIO_HANDLER_INVOCATION_END; |
| } |
| } |
| |
| private: |
| Handler handler_; |
| }; |
| |
| } // namespace detail |
| } // namespace asio |
| |
| #include "asio/detail/pop_options.hpp" |
| |
| #endif // !defined(ASIO_WINDOWS) && !defined(__CYGWIN__) |
| |
| #endif // ASIO_DETAIL_DESCRIPTOR_WRITE_OP_HPP |