bool Condition::wait(UniqueLock<honey::Mutex>& external, honey::MonoClock::TimePoint time)
{
auto _ = ScopeGuard(lock::lockGuard(external));
_waitLock->lock();
++_waitCount;
_waitLock->unlock();
//Wait for both the semaphore and the high resolution timeout
HANDLE handles[2] = { _sema };
int handleCount = 1;
if (time != honey::MonoClock::TimePoint::max())
{
//Convert to windows 100 nanosecond period, negative time means relative
LARGE_INTEGER sleepTime;
sleepTime.QuadPart = (-Alge::max(time - honey::MonoClock::now(), honey::MonoClock::Duration::zero()) / 100).count();
verify(SetWaitableTimer(_timer, &sleepTime, 0, NULL, NULL, 0));
handles[handleCount++] = _timer;
}
//Unfair but safe race condition: external unlock and wait should be atomic
external.unlock();
DWORD res = WaitForMultipleObjects(handleCount, handles, FALSE, INFINITE);
_waitLock->lock();
--_waitCount;
bool lastWait = _broadcast && _waitCount == 0;
_waitLock->unlock();
//Unfair but safe race condition: wait done signal and external relock should be atomic
if (lastWait)
SetEvent(_waitDone);
return res == WAIT_OBJECT_0;
} //external.lock()
ScopeGuard newScope(bool insideLoop) {
return ScopeGuard(*this, insideLoop);
}
