+# Wait for the specified condition to be true, with the specified number of
+# max retries and delay between retries. Otherwise the 'elsescript' is
+# executed.
+proc wait_for_condition {maxtries delay e _else_ elsescript} {
+ while {[incr maxtries -1] >= 0} {
+ if {[uplevel 1 [list expr $e]]} break
+ after $delay
+ }
+ if {$maxtries == -1} {
+ uplevel 1 $elsescript
+ }
+}
+