std::pair<size_t, duration_t> synchronized_reset(Mutex& mtx, CondVar& cv, TimeDuration const& timeout)
{
ACTX_ASSERTS(!blocked());
if (timeout <= TimeDuration::zero())
{
auto c = reset();
return std::make_pair(c, TimeDuration::zero());
}
if (timeout >= (TimeDuration::max)())
{
auto nw = eclipse_clock_t::now();
auto c = pri_synchronized_reset(mtx, cv);
return std::make_pair(c, eclipse_clock_t::now() - nw);
}
auto c = reset();
if (c != 0)
{
return std::make_pair(c, TimeDuration::zero());
}
std::unique_lock<Mutex> guard{mtx};
block();
auto _ = gsl::finally([this]() {unblock(); });
c = reset();
if (c != 0)
{
return std::make_pair(c, TimeDuration::zero());
}
auto const timeout_dur =
std::chrono::duration_cast<duration_t>(timeout);
auto curr_timeout = timeout_dur;
auto final_eclipse = TimeDuration::zero();
while (c == 0)
{
auto bt = eclipse_clock_t::now();
auto status = cv.wait_for(guard, curr_timeout);
if (status == std::cv_status::timeout)
{
c = reset();
final_eclipse = timeout_dur;
break;
}
else
{
auto eclipse = eclipse_clock_t::now() - bt;
c = reset();
final_eclipse += eclipse;
if (eclipse >= curr_timeout)
{
break;
}
curr_timeout -= eclipse;
}
}
return std::make_pair(c, final_eclipse);
}
