| // |
| // detail/executor_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_EXECUTOR_OP_HPP |
| #define ASIO_DETAIL_EXECUTOR_OP_HPP |
| |
| #if defined(_MSC_VER) && (_MSC_VER >= 1200) |
| # pragma once |
| #endif // defined(_MSC_VER) && (_MSC_VER >= 1200) |
| |
| #include "asio/detail/config.hpp" |
| #include "asio/detail/fenced_block.hpp" |
| #include "asio/detail/handler_alloc_helpers.hpp" |
| #include "asio/detail/handler_invoke_helpers.hpp" |
| #include "asio/detail/scheduler_operation.hpp" |
| |
| #include "asio/detail/push_options.hpp" |
| |
| namespace asio { |
| namespace detail { |
| |
| template <typename Handler, typename Alloc, |
| typename Operation = scheduler_operation> |
| class executor_op : public Operation |
| { |
| public: |
| ASIO_DEFINE_HANDLER_ALLOCATOR_PTR(executor_op, Alloc); |
| |
| executor_op(Handler& h, const Alloc& allocator) |
| : Operation(&executor_op::do_complete), |
| handler_(ASIO_MOVE_CAST(Handler)(h)), |
| allocator_(allocator) |
| { |
| } |
| |
| static void do_complete(void* owner, Operation* base, |
| const asio::error_code& /*ec*/, |
| std::size_t /*bytes_transferred*/) |
| { |
| // Take ownership of the handler object. |
| executor_op* o(static_cast<executor_op*>(base)); |
| ptr p = { o->allocator_, o, o }; |
| |
| 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. |
| Handler handler(ASIO_MOVE_CAST(Handler)(o->handler_)); |
| p.reset(); |
| |
| // Make the upcall if required. |
| if (owner) |
| { |
| fenced_block b(fenced_block::half); |
| ASIO_HANDLER_INVOCATION_BEGIN(()); |
| asio_handler_invoke_helpers::invoke(handler, handler); |
| ASIO_HANDLER_INVOCATION_END; |
| } |
| } |
| |
| private: |
| Handler handler_; |
| Alloc allocator_; |
| }; |
| |
| } // namespace detail |
| } // namespace asio |
| |
| #include "asio/detail/pop_options.hpp" |
| |
| #endif // ASIO_DETAIL_EXECUTOR_OP_HPP |