Method cancel

src/yvalve/why.cpp:3994–4014

}

void YEvents::cancel(CheckStatusWrapper* status)
{
	const bool allowCancel = destroyed.compareExchange(0, 1);
	if (!allowCancel)
		return;

	try
	{
		YEntry<YEvents> entry(status, this, CHECK_WARN_ZERO_HANDLE);

		done(status, entry, this, [&]{
				entry.next()->cancel(status);
				if (status->getErrors()[1] == isc_att_shutdown)
					status->init();
			}, [&]{entry.next()->deprecatedCancel(status);});
	}
	catch (const Exception& e)
	{
		e.stuffException(status);
	}
}

void YEvents::deprecatedCancel(CheckStatusWrapper* status)
{