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//
// detail/reactive_socket_accept_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 BOOST_ASIO_DETAIL_REACTIVE_SOCKET_ACCEPT_OP_HPP
#define BOOST_ASIO_DETAIL_REACTIVE_SOCKET_ACCEPT_OP_HPP
#if defined(_MSC_VER) && (_MSC_VER >= 1200)
# pragma once
#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
#include <boost/asio/detail/config.hpp>
#include <boost/asio/detail/addressof.hpp>
#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/reactor_op.hpp>
#include <boost/asio/detail/socket_holder.hpp>
#include <boost/asio/detail/socket_ops.hpp>
#include <boost/asio/detail/push_options.hpp>
namespace boost {
namespace asio {
namespace detail {
template <typename Socket, typename Protocol>
class reactive_socket_accept_op_base : public reactor_op
{
public:
reactive_socket_accept_op_base(socket_type socket,
socket_ops::state_type state, Socket& peer, const Protocol& protocol,
typename Protocol::endpoint* peer_endpoint, func_type complete_func)
: reactor_op(&reactive_socket_accept_op_base::do_perform, complete_func),
socket_(socket),
state_(state),
peer_(peer),
protocol_(protocol),
peer_endpoint_(peer_endpoint)
{
}
static bool do_perform(reactor_op* base)
{
reactive_socket_accept_op_base* o(
static_cast<reactive_socket_accept_op_base*>(base));
std::size_t addrlen = o->peer_endpoint_ ? o->peer_endpoint_->capacity() : 0;
socket_type new_socket = invalid_socket;
bool result = socket_ops::non_blocking_accept(o->socket_,
o->state_, o->peer_endpoint_ ? o->peer_endpoint_->data() : 0,
o->peer_endpoint_ ? &addrlen : 0, o->ec_, new_socket);
// On success, assign new connection to peer socket object.
if (new_socket != invalid_socket)
{
socket_holder new_socket_holder(new_socket);
if (o->peer_endpoint_)
o->peer_endpoint_->resize(addrlen);
if (!o->peer_.assign(o->protocol_, new_socket, o->ec_))
new_socket_holder.release();
}
return result;
}
private:
socket_type socket_;
socket_ops::state_type state_;
Socket& peer_;
Protocol protocol_;
typename Protocol::endpoint* peer_endpoint_;
};
template <typename Socket, typename Protocol, typename Handler>
class reactive_socket_accept_op :
public reactive_socket_accept_op_base<Socket, Protocol>
{
public:
BOOST_ASIO_DEFINE_HANDLER_PTR(reactive_socket_accept_op);
reactive_socket_accept_op(socket_type socket,
socket_ops::state_type state, Socket& peer, const Protocol& protocol,
typename Protocol::endpoint* peer_endpoint, Handler& handler)
: reactive_socket_accept_op_base<Socket, Protocol>(socket, state, peer,
protocol, peer_endpoint, &reactive_socket_accept_op::do_complete),
handler_(BOOST_ASIO_MOVE_CAST(Handler)(handler))
{
}
static void do_complete(io_service_impl* owner, operation* base,
const boost::system::error_code& /*ec*/,
std::size_t /*bytes_transferred*/)
{
// Take ownership of the handler object.
reactive_socket_accept_op* o(static_cast<reactive_socket_accept_op*>(base));
ptr p = { boost::asio::detail::addressof(o->handler_), o, o };
BOOST_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::binder1<Handler, boost::system::error_code>
handler(o->handler_, o->ec_);
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_));
boost_asio_handler_invoke_helpers::invoke(handler, handler.handler_);
BOOST_ASIO_HANDLER_INVOCATION_END;
}
}
private:
Handler handler_;
};
} // namespace detail
} // namespace asio
} // namespace boost
#include <boost/asio/detail/pop_options.hpp>
#endif // BOOST_ASIO_DETAIL_REACTIVE_SOCKET_ACCEPT_OP_HPP
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