diff --git a/src/ca/cadef.h b/src/ca/cadef.h
index ef5c8b5c6..a42a388e8 100644
--- a/src/ca/cadef.h
+++ b/src/ca/cadef.h
@@ -708,6 +708,7 @@ evid	/* 	EVID	R	Event id returned by add event		*/
 /*	early is TRUE then ca_pend() will return immediately without	*/
 /* 	processing outstanding CA labor if no queries are outstanding	*/
 /************************************************************************/
+#define ca_poll() ca_pend((1e-12), 0/*FALSE*/)
 #define ca_pend_event(TIMEOUT) ca_pend((TIMEOUT), 0/*FALSE*/)
 #define ca_pend_io(TIMEOUT) ca_pend((TIMEOUT), 1/*TRUE*/)
 
@@ -797,6 +798,9 @@ chid	/*	CHID	R	Channel ID				*/
  *	a new fd is added or removed
  *      (for use with a manager of the select system call under UNIX)
  *
+ *	if (opened) then fd was created
+ *	if (!opened) then fd was deleted
+ *
  */
 #ifdef CAC_FUNC_PROTO
 typedef void CAFDHANDLER(void *parg, int fd, int opened); 
@@ -934,6 +938,11 @@ void *  /*      PVALUE  R       pointer to new channel value of type    */
 #endif /*CAC_FUNC_PROTO*/
 	);
 
+/*
+ * print status of a sync group
+ */
+int epicsShareAPI ca_sg_stat(CA_SYNC_GID gid);
+
 /*
  * CA_MODIFY_USER_NAME()
  *
diff --git a/src/include/cadef.h b/src/include/cadef.h
index ef5c8b5c6..a42a388e8 100644
--- a/src/include/cadef.h
+++ b/src/include/cadef.h
@@ -708,6 +708,7 @@ evid	/* 	EVID	R	Event id returned by add event		*/
 /*	early is TRUE then ca_pend() will return immediately without	*/
 /* 	processing outstanding CA labor if no queries are outstanding	*/
 /************************************************************************/
+#define ca_poll() ca_pend((1e-12), 0/*FALSE*/)
 #define ca_pend_event(TIMEOUT) ca_pend((TIMEOUT), 0/*FALSE*/)
 #define ca_pend_io(TIMEOUT) ca_pend((TIMEOUT), 1/*TRUE*/)
 
@@ -797,6 +798,9 @@ chid	/*	CHID	R	Channel ID				*/
  *	a new fd is added or removed
  *      (for use with a manager of the select system call under UNIX)
  *
+ *	if (opened) then fd was created
+ *	if (!opened) then fd was deleted
+ *
  */
 #ifdef CAC_FUNC_PROTO
 typedef void CAFDHANDLER(void *parg, int fd, int opened); 
@@ -934,6 +938,11 @@ void *  /*      PVALUE  R       pointer to new channel value of type    */
 #endif /*CAC_FUNC_PROTO*/
 	);
 
+/*
+ * print status of a sync group
+ */
+int epicsShareAPI ca_sg_stat(CA_SYNC_GID gid);
+
 /*
  * CA_MODIFY_USER_NAME()
  *