forked from premiere/premiere-libtorrent
74 lines
2.3 KiB
C++
74 lines
2.3 KiB
C++
/*
|
|
|
|
Copyright (c) 2017, Arvid Norberg
|
|
All rights reserved.
|
|
|
|
Redistribution and use in source and binary forms, with or without
|
|
modification, are permitted provided that the following conditions
|
|
are met:
|
|
|
|
* Redistributions of source code must retain the above copyright
|
|
notice, this list of conditions and the following disclaimer.
|
|
* Redistributions in binary form must reproduce the above copyright
|
|
notice, this list of conditions and the following disclaimer in
|
|
the documentation and/or other materials provided with the distribution.
|
|
* Neither the name of the author nor the names of its
|
|
contributors may be used to endorse or promote products derived
|
|
from this software without specific prior written permission.
|
|
|
|
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
|
|
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
POSSIBILITY OF SUCH DAMAGE.
|
|
|
|
*/
|
|
|
|
#ifndef TORRENT_DEFERRED_HANDLER_HPP
|
|
#define TORRENT_DEFERRED_HANDLER_HPP
|
|
|
|
#include "libtorrent/assert.hpp"
|
|
#include "libtorrent/io_service.hpp"
|
|
|
|
namespace libtorrent { namespace aux {
|
|
|
|
template <typename Handler>
|
|
struct handler_wrapper
|
|
{
|
|
handler_wrapper(bool& in_flight, Handler&& h)
|
|
: m_handler(std::move(h))
|
|
, m_in_flight(in_flight) {}
|
|
template <typename... Args>
|
|
void operator()(Args&&... a)
|
|
{
|
|
TORRENT_ASSERT(m_in_flight);
|
|
m_in_flight = false;
|
|
m_handler(std::forward<Args>(a)...);
|
|
}
|
|
private:
|
|
Handler m_handler;
|
|
bool& m_in_flight;
|
|
};
|
|
|
|
struct deferred_handler
|
|
{
|
|
template <typename Handler>
|
|
void post(io_service& ios, Handler&& h)
|
|
{
|
|
if (m_in_flight) return;
|
|
m_in_flight = true;
|
|
ios.post(handler_wrapper<Handler>(m_in_flight, std::forward<Handler>(h)));
|
|
}
|
|
private:
|
|
bool m_in_flight = false;
|
|
};
|
|
|
|
}}
|
|
#endif
|