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//
// detail/reactive_socket_accept_op.hpp
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//
// Copyright (c) 2003-2018 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_REACTIVE_SOCKET_ACCEPT_OP_HPP
#define ASIO_DETAIL_REACTIVE_SOCKET_ACCEPT_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/bind_handler.hpp"
#include "asio/detail/buffer_sequence_adapter.hpp"
#include "asio/detail/fenced_block.hpp"
#include "asio/detail/memory.hpp"
#include "asio/detail/reactor_op.hpp"
#include "asio/detail/socket_holder.hpp"
#include "asio/detail/socket_ops.hpp"
#include "asio/detail/push_options.hpp"
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),
addrlen_(peer_endpoint ? peer_endpoint->capacity() : 0)
{
}
static status do_perform(reactor_op* base)
{
reactive_socket_accept_op_base* o(
static_cast<reactive_socket_accept_op_base*>(base));
socket_type new_socket = invalid_socket;
status result = socket_ops::non_blocking_accept(o->socket_,
o->state_, o->peer_endpoint_ ? o->peer_endpoint_->data() : 0,
o->peer_endpoint_ ? &o->addrlen_ : 0, o->ec_, new_socket)
? done : not_done;
o->new_socket_.reset(new_socket);
ASIO_HANDLER_REACTOR_OPERATION((*o, "non_blocking_accept", o->ec_));
return result;
}
void do_assign()
{
if (new_socket_.get() != invalid_socket)
{
if (peer_endpoint_)
peer_endpoint_->resize(addrlen_);
peer_.assign(protocol_, new_socket_.get(), ec_);
if (!ec_)
new_socket_.release();
}
}
private:
socket_type socket_;
socket_ops::state_type state_;
socket_holder new_socket_;
Socket& peer_;
Protocol protocol_;
typename Protocol::endpoint* peer_endpoint_;
std::size_t addrlen_;
};
template <typename Socket, typename Protocol, typename Handler>
class reactive_socket_accept_op :
public reactive_socket_accept_op_base<Socket, Protocol>
{
public:
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_(ASIO_MOVE_CAST(Handler)(handler))
{
handler_work<Handler>::start(handler_);
}
static void do_complete(void* owner, operation* base,
const asio::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 = { asio::detail::addressof(o->handler_), o, o };
handler_work<Handler> w(o->handler_);
// On success, assign new connection to peer socket object.
if (owner)
o->do_assign();
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, asio::error_code>
handler(o->handler_, o->ec_);
p.h = asio::detail::addressof(handler.handler_);
p.reset();
// Make the upcall if required.
if (owner)
{
fenced_block b(fenced_block::half);
ASIO_HANDLER_INVOCATION_BEGIN((handler.arg1_));
w.complete(handler, handler.handler_);
ASIO_HANDLER_INVOCATION_END;
}
}
private:
Handler handler_;
};
#if defined(ASIO_HAS_MOVE)
template <typename Protocol, typename Handler>
class reactive_socket_move_accept_op :
private Protocol::socket,
public reactive_socket_accept_op_base<typename Protocol::socket, Protocol>
{
public:
ASIO_DEFINE_HANDLER_PTR(reactive_socket_move_accept_op);
reactive_socket_move_accept_op(io_context& ioc, socket_type socket,
socket_ops::state_type state, const Protocol& protocol,
typename Protocol::endpoint* peer_endpoint, Handler& handler)
: Protocol::socket(ioc),
reactive_socket_accept_op_base<typename Protocol::socket, Protocol>(
socket, state, *this, protocol, peer_endpoint,
&reactive_socket_move_accept_op::do_complete),
handler_(ASIO_MOVE_CAST(Handler)(handler))
{
handler_work<Handler>::start(handler_);
}
static void do_complete(void* owner, operation* base,
const asio::error_code& /*ec*/,
std::size_t /*bytes_transferred*/)
{
// Take ownership of the handler object.
reactive_socket_move_accept_op* o(
static_cast<reactive_socket_move_accept_op*>(base));
ptr p = { asio::detail::addressof(o->handler_), o, o };
handler_work<Handler> w(o->handler_);
// On success, assign new connection to peer socket object.
if (owner)
o->do_assign();
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::move_binder2<Handler,
asio::error_code, typename Protocol::socket>
handler(0, ASIO_MOVE_CAST(Handler)(o->handler_), o->ec_,
ASIO_MOVE_CAST(typename Protocol::socket)(*o));
p.h = asio::detail::addressof(handler.handler_);
p.reset();
// Make the upcall if required.
if (owner)
{
fenced_block b(fenced_block::half);
ASIO_HANDLER_INVOCATION_BEGIN((handler.arg1_, "..."));
w.complete(handler, handler.handler_);
ASIO_HANDLER_INVOCATION_END;
}
}
private:
Handler handler_;
};
#endif // defined(ASIO_HAS_MOVE)
} // namespace detail
} // namespace asio
#include "asio/detail/pop_options.hpp"
#endif // ASIO_DETAIL_REACTIVE_SOCKET_ACCEPT_OP_HPP
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