From 5cfff383b265ab99448ce44d39b0e865bf9bdd4d Mon Sep 17 00:00:00 2001
From: Andrew Johnson <anj@anl.gov>
Date: Fri, 7 Jun 2019 13:16:42 -0500
Subject: [PATCH] Synchronization hook support for osiClockTime

---
 src/libCom/osi/osiClockTime.c | 7 +++++++
 src/libCom/osi/osiClockTime.h | 6 ++++++
 2 files changed, 13 insertions(+)

diff --git a/src/libCom/osi/osiClockTime.c b/src/libCom/osi/osiClockTime.c
index fb9d1532f..8ae43aed8 100644
--- a/src/libCom/osi/osiClockTime.c
+++ b/src/libCom/osi/osiClockTime.c
@@ -148,6 +148,8 @@ void ClockTime_GetProgramStart(epicsTimeStamp *pDest)
 /* Synchronization thread */
 
 #if defined(vxWorks) || defined(__rtems__)
+CLOCKTIME_SYNCHOOK ClockTime_syncHook = NULL;
+
 static void ClockTimeSync(void *dummy)
 {
     taskwdInsert(0, NULL, NULL);
@@ -179,11 +181,16 @@ static void ClockTimeSync(void *dummy)
             ClockTimePvt.syncTime         = timeNow;
             epicsMutexUnlock(ClockTimePvt.lock);
 
+            if (ClockTime_syncHook)
+                ClockTime_syncHook(1);
+
             ClockTimePvt.ClockTimeSyncInterval = ClockTimeSyncInterval_value;
         }
     }
 
     ClockTimePvt.synchronized = 0;
+    if (ClockTime_syncHook)
+        ClockTime_syncHook(0);
     taskwdRemove(0);
 }
 #endif
diff --git a/src/libCom/osi/osiClockTime.h b/src/libCom/osi/osiClockTime.h
index 17eacab3e..23598886d 100644
--- a/src/libCom/osi/osiClockTime.h
+++ b/src/libCom/osi/osiClockTime.h
@@ -19,6 +19,12 @@ void ClockTime_Init(int synchronize);
 void ClockTime_Shutdown(void *dummy);
 int  ClockTime_Report(int level);
 
+#if defined(vxWorks) || defined(__rtems__)
+typedef void (* CLOCKTIME_SYNCHOOK)(int synchronized);
+
+extern CLOCKTIME_SYNCHOOK ClockTime_syncHook;
+#endif
+
 #ifdef __cplusplus
 }
 #endif