//
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// detail/winrt_socket_recv_op.hpp
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// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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//
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// Copyright (c) 2003-2018 Christopher M. Kohlhoff (chris at kohlhoff dot com)
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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#ifndef ASIO_DETAIL_WINRT_SOCKET_RECV_OP_HPP
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#define ASIO_DETAIL_WINRT_SOCKET_RECV_OP_HPP
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#if defined(_MSC_VER) && (_MSC_VER >= 1200)
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# pragma once
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#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
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#include "asio/detail/config.hpp"
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#if defined(ASIO_WINDOWS_RUNTIME)
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#include "asio/detail/bind_handler.hpp"
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#include "asio/detail/buffer_sequence_adapter.hpp"
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#include "asio/detail/fenced_block.hpp"
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#include "asio/detail/handler_alloc_helpers.hpp"
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#include "asio/detail/handler_invoke_helpers.hpp"
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#include "asio/detail/memory.hpp"
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#include "asio/detail/winrt_async_op.hpp"
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#include "asio/error.hpp"
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#include "asio/detail/push_options.hpp"
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namespace asio {
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namespace detail {
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template <typename MutableBufferSequence, typename Handler>
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class winrt_socket_recv_op :
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public winrt_async_op<Windows::Storage::Streams::IBuffer^>
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{
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public:
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ASIO_DEFINE_HANDLER_PTR(winrt_socket_recv_op);
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winrt_socket_recv_op(const MutableBufferSequence& buffers, Handler& handler)
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: winrt_async_op<Windows::Storage::Streams::IBuffer^>(
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&winrt_socket_recv_op::do_complete),
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buffers_(buffers),
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handler_(ASIO_MOVE_CAST(Handler)(handler))
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{
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handler_work<Handler>::start(handler_);
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}
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static void do_complete(void* owner, operation* base,
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const asio::error_code&, std::size_t)
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{
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// Take ownership of the operation object.
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winrt_socket_recv_op* o(static_cast<winrt_socket_recv_op*>(base));
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ptr p = { asio::detail::addressof(o->handler_), o, o };
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handler_work<Handler> w(o->handler_);
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ASIO_HANDLER_COMPLETION((*o));
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#if defined(ASIO_ENABLE_BUFFER_DEBUGGING)
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// Check whether buffers are still valid.
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if (owner)
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{
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buffer_sequence_adapter<asio::mutable_buffer,
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MutableBufferSequence>::validate(o->buffers_);
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}
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#endif // defined(ASIO_ENABLE_BUFFER_DEBUGGING)
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std::size_t bytes_transferred = o->result_ ? o->result_->Length : 0;
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if (bytes_transferred == 0 && !o->ec_ &&
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!buffer_sequence_adapter<asio::mutable_buffer,
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MutableBufferSequence>::all_empty(o->buffers_))
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{
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o->ec_ = asio::error::eof;
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}
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// Make a copy of the handler so that the memory can be deallocated before
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// the upcall is made. Even if we're not about to make an upcall, a
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// sub-object of the handler may be the true owner of the memory associated
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// with the handler. Consequently, a local copy of the handler is required
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// to ensure that any owning sub-object remains valid until after we have
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// deallocated the memory here.
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detail::binder2<Handler, asio::error_code, std::size_t>
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handler(o->handler_, o->ec_, bytes_transferred);
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p.h = asio::detail::addressof(handler.handler_);
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p.reset();
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// Make the upcall if required.
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if (owner)
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{
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fenced_block b(fenced_block::half);
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ASIO_HANDLER_INVOCATION_BEGIN((handler.arg1_, handler.arg2_));
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w.complete(handler, handler.handler_);
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ASIO_HANDLER_INVOCATION_END;
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}
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}
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private:
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MutableBufferSequence buffers_;
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Handler handler_;
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};
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} // namespace detail
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} // namespace asio
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#include "asio/detail/pop_options.hpp"
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#endif // defined(ASIO_WINDOWS_RUNTIME)
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#endif // ASIO_DETAIL_WINRT_SOCKET_RECV_OP_HPP
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