Can occur by using timer supervision's TQE DEQUEUE routine. This
routine removes a specific TQE from the real time queue and resets
clocks if necessary. The
entry point to the TQE DEQUEUE routine is in CVT field CVTQTD00. Entry to this routine must be by branch entry, in
supervisor state, with PSW key zero. You must be in primary ASC mode
and the primary address space must be the home address space (PASH=HASH).
Before entering the TQE DEQUEUE routine, you must issue SETLOCK OBTAIN,TYPE=DISP
,MODE=UNCOND
. The input environment is as follows:
,MODE=UNCOND. The input environment is as follows: - Register 1 must contain the address of the TQE to be dequeued.
- Register 2 must contain the caller's return address.
Upon return, all registers except 13 and 15 are the same as they
were on entry. Register 15 contains a return code:
- Code
- Meaning
- 0
- The TQE was on the queue and has been removed.
- 4
- The TQE was not on the queue.