iocInit: announce "init" hooks during iocShutdown

src/ioc/db/initHooks.h

@@ -48,6 +48,14 @@ typedef enum {
     initHookAfterDatabasePaused,
     initHookAfterIocPaused,         /* End of iocPause command */
 
+    initHookAtIocShutdown,          /* Start of iocShutdown */
+    initHookAfterCaLinkClose,
+    initHookAfterScanShutdown,
+    initHookAfterCallbackShutdown,
+    initHookAfterCaServerStopped,
+    initHookAfterDatabaseStopped,
+    initHookAfterIocShutdown,       /* End of iocShutdown */
+
 /* Deprecated states, provided for backwards compatibility.
  * These states are announced at the same point they were before,
  * but will not be repeated if the IOC gets paused and restarted.

src/ioc/misc/iocInit.c

@@ -688,13 +688,20 @@ static void doFreeRecord(dbRecordType *pdbRecordType, dbCommon *precord,
 int iocShutdown(void)
 {
     if (iocState == iocVirgin || iocState == iocStopped) return 0;
+    initHookAnnounce(initHookAtIocShutdown); // TODO: iterate hooks in reverse
     iterateRecords(doCloseLinks, NULL);
+    initHookAnnounce(initHookAfterCaLinkClose);
     if (iocBuildMode==buildIsolated) {
         /* stop and "join" threads */
         scanStop();
+        initHookAnnounce(initHookAfterScanShutdown);
         callbackStop();
+        initHookAnnounce(initHookAfterCallbackShutdown);
     }
     dbCaShutdown(); /* must be before dbFreeRecord and dbChannelExit */
+    initHookAnnounce(initHookAfterCaServerStopped);
+    /* placeholder, RSRV will eventually stop here */
+    initHookAnnounce(initHookAfterDatabaseStopped);
     if (iocBuildMode==buildIsolated) {
         /* free resources */
         scanCleanup();
@@ -708,6 +715,7 @@ int iocShutdown(void)
     }
     iocState = iocStopped;
     iocBuildMode = buildRSRV;
+    initHookAnnounce(initHookAfterIocShutdown);
     return 0;
 }