musique/lib/link/include/ableton/test/serial_io/Timer.hpp
2023-01-06 16:53:58 +01:00

111 lines
2.4 KiB
C++

/* Copyright 2016, Ableton AG, Berlin. All rights reserved.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* If you would like to incorporate Link into a proprietary software application,
* please contact <link-devs@ableton.com>.
*/
#pragma once
#include <ableton/test/serial_io/SchedulerTree.hpp>
namespace ableton
{
namespace test
{
namespace serial_io
{
struct Timer
{
using ErrorCode = SchedulerTree::TimerErrorCode;
using TimePoint = SchedulerTree::TimePoint;
Timer(const SchedulerTree::TimerId timerId,
const TimePoint& now,
std::shared_ptr<SchedulerTree> pScheduler)
: mId(timerId)
, mNow(now)
, mpScheduler(std::move(pScheduler))
{
}
~Timer()
{
if (!mbMovedFrom)
{
cancel();
}
}
Timer(const Timer&) = delete;
Timer(Timer&& rhs)
: mId(rhs.mId)
, mNow(rhs.mNow)
, mExpiration(std::move(rhs.mExpiration))
, mpScheduler(std::move(rhs.mpScheduler))
{
rhs.mbMovedFrom = true;
}
void expires_at(const TimePoint t)
{
if (t < mNow)
{
throw std::runtime_error("Setting timer in the past");
}
else
{
cancel();
mExpiration = t;
}
}
template <typename T, typename Rep>
void expires_from_now(std::chrono::duration<T, Rep> duration)
{
expires_at(mNow + duration);
}
void cancel()
{
auto pScheduler = mpScheduler.lock();
pScheduler->cancelTimer(mId);
}
template <typename Handler>
void async_wait(Handler handler)
{
auto pScheduler = mpScheduler.lock();
pScheduler->setTimer(mId, mExpiration, std::move(handler));
}
TimePoint now() const
{
return mNow;
}
const SchedulerTree::TimerId mId;
const TimePoint& mNow;
TimePoint mExpiration;
std::weak_ptr<SchedulerTree> mpScheduler;
bool mbMovedFrom = false;
};
} // namespace serial_io
} // namespace test
} // namespace ableton