Method waitMany

deps/concurrentqueue/lightweightsemaphore.h:377–384

Acquires at least one, and (greedily) at most max

	// Acquires at least one, and (greedily) at most max
	ssize_t waitMany(ssize_t max, std::int64_t timeout_usecs)
	{
		assert(max >= 0);
		ssize_t result = tryWaitMany(max);
		if (result == 0 && max > 0)
			result = waitManyWithPartialSpinning(max, timeout_usecs);
		return result;
	}
	
	ssize_t waitMany(ssize_t max)
	{