dbNotify: shutdown with exitDatabase

Can't cleanup dbNotify while rsrv or scan tasks
are running as there may be operations in progress.

src/ioc/db/dbNotify.c

@@ -299,7 +299,7 @@ static void notifyCallback(CALLBACK *pcallback)
     callDone(precord, ppn);
 }
 
-static void dbProcessNotifyExit(void* junk)
+void dbProcessNotifyExit(void)
 {
     assert(ellCount(&pnotifyGlobal->freeList)==0);
     epicsMutexDestroy(pnotifyGlobal->lock);
@@ -314,7 +314,6 @@ void dbProcessNotifyInit(void)
     pnotifyGlobal = dbCalloc(1,sizeof(notifyGlobal));
     pnotifyGlobal->lock = epicsMutexMustCreate();
     ellInit(&pnotifyGlobal->freeList);
-    epicsAtExit(dbProcessNotifyExit, NULL);
 }
 
 void dbProcessNotify(processNotify *ppn)

src/ioc/db/dbNotify.h

@@ -76,6 +76,7 @@ epicsShareFunc void dbNotifyCancel(processNotify *pprocessNotify);
 
 /* dbProcessNotifyInit called by iocInit */
 epicsShareFunc void dbProcessNotifyInit(void);
+epicsShareFunc void dbProcessNotifyExit(void);
 
 /*dbNotifyAdd called by dbScanPassive and dbScanLink*/
 epicsShareFunc void dbNotifyAdd(

src/ioc/misc/iocInit.c

@@ -684,6 +684,7 @@ int iocShutdown(void)
         dbLockCleanupRecords(pdbbase);
         asShutdown();
         dbChannelExit();
+        dbProcessNotifyExit();
         iocshFree();
     }
     iocState = iocStopped;