diff --git a/sysutils.go b/sysutils.go
index 20ce26e..c7fb225 100644
--- a/sysutils.go
+++ b/sysutils.go
@@ -353,6 +353,11 @@ func CreateCondTimer(ch chan int64, cond *sync.Cond, initSeconds int64) {
 	}
 }
 
+func ExcUntilOk(cb func()bool) {
+	for !cb() {
+	}
+}
+
 func IsDebug() bool {
 	return true
 }