//
|
// detail/blocking_executor_op.hpp
|
// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
//
|
// Copyright (c) 2003-2020 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_BLOCKING_EXECUTOR_OP_HPP
|
#define BOOST_ASIO_DETAIL_BLOCKING_EXECUTOR_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/event.hpp>
|
#include <boost/asio/detail/fenced_block.hpp>
|
#include <boost/asio/detail/handler_invoke_helpers.hpp>
|
#include <boost/asio/detail/mutex.hpp>
|
#include <boost/asio/detail/scheduler_operation.hpp>
|
|
#include <boost/asio/detail/push_options.hpp>
|
|
namespace boost {
|
namespace asio {
|
namespace detail {
|
|
template <typename Operation = scheduler_operation>
|
class blocking_executor_op_base : public Operation
|
{
|
public:
|
blocking_executor_op_base(typename Operation::func_type complete_func)
|
: Operation(complete_func),
|
is_complete_(false)
|
{
|
}
|
|
void wait()
|
{
|
boost::asio::detail::mutex::scoped_lock lock(mutex_);
|
while (!is_complete_)
|
event_.wait(lock);
|
}
|
|
protected:
|
struct do_complete_cleanup
|
{
|
~do_complete_cleanup()
|
{
|
boost::asio::detail::mutex::scoped_lock lock(op_->mutex_);
|
op_->is_complete_ = true;
|
op_->event_.unlock_and_signal_one_for_destruction(lock);
|
}
|
|
blocking_executor_op_base* op_;
|
};
|
|
private:
|
boost::asio::detail::mutex mutex_;
|
boost::asio::detail::event event_;
|
bool is_complete_;
|
};
|
|
template <typename Handler, typename Operation = scheduler_operation>
|
class blocking_executor_op : public blocking_executor_op_base<Operation>
|
{
|
public:
|
blocking_executor_op(Handler& h)
|
: blocking_executor_op_base<Operation>(&blocking_executor_op::do_complete),
|
handler_(h)
|
{
|
}
|
|
static void do_complete(void* owner, Operation* base,
|
const boost::system::error_code& /*ec*/,
|
std::size_t /*bytes_transferred*/)
|
{
|
blocking_executor_op* o(static_cast<blocking_executor_op*>(base));
|
|
typename blocking_executor_op_base<Operation>::do_complete_cleanup
|
on_exit = { o };
|
(void)on_exit;
|
|
BOOST_ASIO_HANDLER_COMPLETION((*o));
|
|
// Make the upcall if required.
|
if (owner)
|
{
|
fenced_block b(fenced_block::half);
|
BOOST_ASIO_HANDLER_INVOCATION_BEGIN(());
|
boost_asio_handler_invoke_helpers::invoke(o->handler_, o->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_BLOCKING_EXECUTOR_OP_HPP
|
