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//
// detail/impl/win_iocp_io_service.hpp
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
//
// Copyright (c) 2003-2010 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_IMPL_WIN_IOCP_IO_SERVICE_HPP
#define BOOST_ASIO_DETAIL_IMPL_WIN_IOCP_IO_SERVICE_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/call_stack.hpp>
#include <boost/asio/detail/completion_handler.hpp>
#include <boost/asio/detail/fenced_block.hpp>
#include <boost/asio/detail/handler_alloc_helpers.hpp>
#include <boost/asio/detail/handler_invoke_helpers.hpp>
#include <boost/asio/detail/push_options.hpp>
namespace boost {
namespace asio {
namespace detail {
template <typename Handler>
void win_iocp_io_service::dispatch(Handler handler)
{
if (call_stack<win_iocp_io_service>::contains(this))
{
boost::asio::detail::fenced_block b;
boost_asio_handler_invoke_helpers::invoke(handler, handler);
}
else
post(handler);
}
template <typename Handler>
void win_iocp_io_service::post(Handler handler)
{
// Allocate and construct an operation to wrap the handler.
typedef completion_handler<Handler> op;
typename op::ptr p = { boost::addressof(handler),
boost_asio_handler_alloc_helpers::allocate(
sizeof(op), handler), 0 };
p.p = new (p.v) op(handler);
post_immediate_completion(p.p);
p.v = p.p = 0;
}
template <typename Time_Traits>
void win_iocp_io_service::add_timer_queue(
timer_queue<Time_Traits>& queue)
{
do_add_timer_queue(queue);
}
template <typename Time_Traits>
void win_iocp_io_service::remove_timer_queue(
timer_queue<Time_Traits>& queue)
{
do_remove_timer_queue(queue);
}
template <typename Time_Traits>
void win_iocp_io_service::schedule_timer(timer_queue<Time_Traits>& queue,
const typename Time_Traits::time_type& time,
typename timer_queue<Time_Traits>::per_timer_data& timer, timer_op* op)
{
// If the service has been shut down we silently discard the timer.
if (::InterlockedExchangeAdd(&shutdown_, 0) != 0)
{
post_immediate_completion(op);
return;
}
mutex::scoped_lock lock(dispatch_mutex_);
bool earliest = queue.enqueue_timer(time, timer, op);
work_started();
if (earliest)
update_timeout();
}
template <typename Time_Traits>
std::size_t win_iocp_io_service::cancel_timer(timer_queue<Time_Traits>& queue,
typename timer_queue<Time_Traits>::per_timer_data& timer)
{
// If the service has been shut down we silently ignore the cancellation.
if (::InterlockedExchangeAdd(&shutdown_, 0) != 0)
return 0;
mutex::scoped_lock lock(dispatch_mutex_);
op_queue<win_iocp_operation> ops;
std::size_t n = queue.cancel_timer(timer, ops);
post_deferred_completions(ops);
return n;
}
} // namespace detail
} // namespace asio
} // namespace boost
#include <boost/asio/detail/pop_options.hpp>
#endif // defined(BOOST_ASIO_HAS_IOCP)
#endif // BOOST_ASIO_DETAIL_IMPL_WIN_IOCP_IO_SERVICE_HPP
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