/* This routine can be called from interrupt context */
int callbackRequest(CALLBACK *pcallback)
{
int priority;
int pushOK;
cbQueueSet *mySet;
if (!pcallback) {
epicsInterruptContextMessage("callbackRequest: pcallback was NULL\n");
return S_db_notInit;
}
priority = pcallback->priority;
if (priority < 0 || priority >= NUM_CALLBACK_PRIORITIES) {
epicsInterruptContextMessage("callbackRequest: Bad priority\n");
return S_db_badChoice;
}
mySet = &callbackQueue[priority];
if (mySet->queueOverflow) return S_db_bufFull;
pushOK = epicsRingPointerPush(mySet->queue, pcallback);
if (!pushOK) {
char msg[48] = "callbackRequest: ";
strcat(msg, threadNamePrefix[priority]);
strcat(msg, " ring buffer full\n");
epicsInterruptContextMessage(msg);
mySet->queueOverflow = TRUE;
return S_db_bufFull;
}
epicsEventSignal(mySet->semWakeUp);
return 0;
}
void scanOnce(struct dbCommon *precord)
{
static int newOverflow = TRUE;
int lockKey;
int pushOK;
lockKey = epicsInterruptLock();
pushOK = epicsRingPointerPush(onceQ, precord);
epicsInterruptUnlock(lockKey);
if (!pushOK) {
if (newOverflow) errlogPrintf("scanOnce: Ring buffer overflow\n");
newOverflow = FALSE;
} else {
newOverflow = TRUE;
}
epicsEventSignal(onceSem);
}
