boost/asio/detail/win_iocp_handle_read_op.hpp
//
// detail/win_iocp_handle_read_op.hpp
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//
// Copyright (c) 2003-2024 Christopher M. Kohlhoff (chris at kohlhoff dot com)
// Copyright (c) 2008 Rep Invariant Systems, Inc. (info@repinvariant.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_DETAIL_WIN_IOCP_HANDLE_READ_OP_HPP
#define BOOST_ASIO_DETAIL_WIN_IOCP_HANDLE_READ_OP_HPP
#if defined(_MSC_VER) && (_MSC_VER >= 1200)
# pragma once
#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
#include <boost/asio/detail/config.hpp>
#if defined(BOOST_ASIO_HAS_IOCP)
#include <boost/asio/detail/bind_handler.hpp>
#include <boost/asio/detail/buffer_sequence_adapter.hpp>
#include <boost/asio/detail/fenced_block.hpp>
#include <boost/asio/detail/handler_alloc_helpers.hpp>
#include <boost/asio/detail/handler_work.hpp>
#include <boost/asio/detail/memory.hpp>
#include <boost/asio/detail/operation.hpp>
#include <boost/asio/error.hpp>
#include <boost/asio/detail/push_options.hpp>
namespace boost {
namespace asio {
namespace detail {
template <typename MutableBufferSequence, typename Handler, typename IoExecutor>
class win_iocp_handle_read_op : public operation
{
public:
BOOST_ASIO_DEFINE_HANDLER_PTR(win_iocp_handle_read_op);
win_iocp_handle_read_op(const MutableBufferSequence& buffers,
Handler& handler, const IoExecutor& io_ex)
: operation(&win_iocp_handle_read_op::do_complete),
buffers_(buffers),
handler_(static_cast<Handler&&>(handler)),
work_(handler_, io_ex)
{
}
static void do_complete(void* owner, operation* base,
const boost::system::error_code& result_ec,
std::size_t bytes_transferred)
{
boost::system::error_code ec(result_ec);
// Take ownership of the operation object.
BOOST_ASIO_ASSUME(base != 0);
win_iocp_handle_read_op* o(static_cast<win_iocp_handle_read_op*>(base));
ptr p = { boost::asio::detail::addressof(o->handler_), o, o };
BOOST_ASIO_HANDLER_COMPLETION((*o));
// Take ownership of the operation's outstanding work.
handler_work<Handler, IoExecutor> w(
static_cast<handler_work<Handler, IoExecutor>&&>(
o->work_));
#if defined(BOOST_ASIO_ENABLE_BUFFER_DEBUGGING)
if (owner)
{
// Check whether buffers are still valid.
buffer_sequence_adapter<boost::asio::mutable_buffer,
MutableBufferSequence>::validate(o->buffers_);
}
#endif // defined(BOOST_ASIO_ENABLE_BUFFER_DEBUGGING)
// Map non-portable errors to their portable counterparts.
if (ec.value() == ERROR_HANDLE_EOF)
ec = boost::asio::error::eof;
BOOST_ASIO_ERROR_LOCATION(ec);
// 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, boost::system::error_code, std::size_t>
handler(o->handler_, ec, bytes_transferred);
p.h = boost::asio::detail::addressof(handler.handler_);
p.reset();
// Make the upcall if required.
if (owner)
{
fenced_block b(fenced_block::half);
BOOST_ASIO_HANDLER_INVOCATION_BEGIN((handler.arg1_, handler.arg2_));
w.complete(handler, handler.handler_);
BOOST_ASIO_HANDLER_INVOCATION_END;
}
}
private:
MutableBufferSequence buffers_;
Handler handler_;
handler_work<Handler, IoExecutor> work_;
};
} // namespace detail
} // namespace asio
} // namespace boost
#include <boost/asio/detail/pop_options.hpp>
#endif // defined(BOOST_ASIO_HAS_IOCP)
#endif // BOOST_ASIO_DETAIL_WIN_IOCP_HANDLE_READ_OP_HPP