changes callbacks to use locked ring buffer

src/db/callback.c

@@ -110,9 +110,7 @@ static void callbackShutdown(void *arg)
     int i;
 
     for (i = 0; i < NUM_CALLBACK_PRIORITIES; i++) {
-        int lockKey = epicsInterruptLock();
         int ok = epicsRingPointerPush(callbackQ[i], &exitCallback);
-        epicsInterruptUnlock(lockKey);
         epicsEventSignal(callbackSem[i]);
         if (ok) epicsEventWait(startStopEvent);
     }
@@ -128,7 +126,7 @@ static void callbackInitOnce(void *arg)
         epicsThreadId tid;
 
         callbackSem[i] = epicsEventMustCreate(epicsEventEmpty);
-        callbackQ[i] = epicsRingPointerCreate(callbackQueueSize);
+        callbackQ[i] = epicsRingPointerLockedCreate(callbackQueueSize);
         if (callbackQ[i] == 0)
             cantProceed("epicsRingPointerCreate failed for %s\n",
                 threadName[i]);
@@ -154,7 +152,6 @@ void callbackRequest(CALLBACK *pcallback)
 {
     int priority;
     int pushOK;
-    int lockKey;
 
     if (!pcallback) {
         epicsInterruptContextMessage("callbackRequest: pcallback was NULL\n");
@@ -167,9 +164,7 @@ void callbackRequest(CALLBACK *pcallback)
     }
     if (ringOverflow[priority]) return;
 
-    lockKey = epicsInterruptLock();
     pushOK = epicsRingPointerPush(callbackQ[priority], pcallback);
-    epicsInterruptUnlock(lockKey);
 
     if (!pushOK) {
         epicsInterruptContextMessage(fullMessage[priority]);