10ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie// 20ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie// detail/reactive_null_buffers_op.hpp 30ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 40ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie// 50ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie// Copyright (c) 2003-2015 Christopher M. Kohlhoff (chris at kohlhoff dot com) 60ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie// 70ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie// Distributed under the Boost Software License, Version 1.0. (See accompanying 80ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) 90ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie// 100ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie 110ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie#ifndef ASIO_DETAIL_REACTIVE_NULL_BUFFERS_OP_HPP 120ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie#define ASIO_DETAIL_REACTIVE_NULL_BUFFERS_OP_HPP 130ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie 140ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie 150ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie#include "asio/detail/config.hpp" 160ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie#include "asio/detail/addressof.hpp" 170ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie#include "asio/detail/fenced_block.hpp" 180ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie#include "asio/detail/handler_alloc_helpers.hpp" 190ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie#include "asio/detail/handler_invoke_helpers.hpp" 200ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie#include "asio/detail/reactor_op.hpp" 210ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie 220ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie#include "asio/detail/push_options.hpp" 230ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie 240ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffienamespace asio { 250ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffienamespace detail { 260ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie 270ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffietemplate <typename Handler> 280ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffieclass reactive_null_buffers_op : public reactor_op 290ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie{ 300ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffiepublic: 310ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie ASIO_DEFINE_HANDLER_PTR(reactive_null_buffers_op); 320ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie 330ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie reactive_null_buffers_op(Handler& handler) 340ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie : reactor_op(&reactive_null_buffers_op::do_perform, 350ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie &reactive_null_buffers_op::do_complete), 360ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie handler_(ASIO_MOVE_CAST(Handler)(handler)) 370ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie { 380ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie } 390ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie 400ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie static bool do_perform(reactor_op*) 410ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie { 420ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie return true; 430ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie } 440ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie 450ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie static void do_complete(io_service_impl* owner, operation* base, 460ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie const asio::error_code& /*ec*/, 470ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie std::size_t /*bytes_transferred*/) 480ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie { 490ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie // Take ownership of the handler object. 500ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie reactive_null_buffers_op* o(static_cast<reactive_null_buffers_op*>(base)); 510ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie ptr p = { asio::detail::addressof(o->handler_), o, o }; 520ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie 530ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie ASIO_HANDLER_COMPLETION((o)); 540ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie 550ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie // Make a copy of the handler so that the memory can be deallocated before 560ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie // the upcall is made. Even if we're not about to make an upcall, a 570ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie // sub-object of the handler may be the true owner of the memory associated 580ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie // with the handler. Consequently, a local copy of the handler is required 590ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie // to ensure that any owning sub-object remains valid until after we have 600ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie // deallocated the memory here. 610ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie detail::binder2<Handler, asio::error_code, std::size_t> 620ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie handler(o->handler_, o->ec_, o->bytes_transferred_); 630ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie p.h = asio::detail::addressof(handler.handler_); 640ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie p.reset(); 650ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie 660ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie // Make the upcall if required. 670ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie if (owner) 680ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie { 690ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie fenced_block b(fenced_block::half); 700ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie ASIO_HANDLER_INVOCATION_BEGIN((handler.arg1_, handler.arg2_)); 710ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie asio_handler_invoke_helpers::invoke(handler, handler.handler_); 720ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie ASIO_HANDLER_INVOCATION_END; 730ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie } 740ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie } 750ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie 760ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffieprivate: 770ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie Handler handler_; 780ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie}; 790ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie 800ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie} // namespace detail 810ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie} // namespace asio 820ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie 830ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie#include "asio/detail/pop_options.hpp" 840ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie 850ee85db398be8ea33d67cc42f99a1468cd6c8180François Gaffie#endif // ASIO_DETAIL_REACTIVE_NULL_BUFFERS_OP_HPP 86