[F90:]subroutine gEnqQueueLength(len) integer, intent(out) :: len
Arguments
len
The length of the event queue
= 0,
If no events are waiting
> 0,
If any events are waiting
Description
The routine gEnqQueueLength() is called to enquire whether an event is waiting in the queue to be read. If none, len is set to 0. If an event is waiting, len is set to the number of events in the queue. In some cases, the device may not know exactly how many events are waiting, in which case, len will be set to the minimum.
