GDSX Manual

Service Routines

Extended General Device Support (GDSX) Manual–134303

8-83

VSEM

record-count input

INT(32):value

specifies the maximum number of records that can be generated for the trace file

before the entries wrap. The default is 4,096D and the maximum is 32,000D.

Example

See the examples included with the description of the ADD^TRACE^DATA procedure

in this section.

VSEM

This procedure releases a noncheckpoint semaphore so that other tasks can use the

associated resource. The checkpoint semaphore is released with the GIVE^CPSEM

procedure.

Any error-handling or special handling after accessing a resource should be done before

calling VSEM. When a task calls VSEM, TSCODE verifies that the caller owns the

semaphore, then checks the semaphore’s wait list. If this list is not empty, the first task

on the list is given the semaphore and an E^RESOURCE event is caused for the task.

semaphore input

is a pointer to the semaphore to be released.

WAITED^IO[X]

The WAITED^IO and WAITED^IOX procedures perform a waited I/O, even if there are

other I/O operations outstanding.

CALL VSEM ( semaphore ); !

INT:ref (Semaphore in global memory)

INT(32) .EXT:ref (Pointer to semaphore in extended memory)

Note. This operation is waited only from the perspective of the calling task—it is not a waited

I/O from the perspective of the GDSX process. In other words, calling this procedure causes

the calling task to be suspended, but other tasks are not suspended as a result of such a call.