1 files changed, 18 insertions, 0 deletions
diff --git a/src/runtime/time.go b/src/runtime/time.go
index d667d11244..5521b8a807 100644
--- a/src/runtime/time.go
+++ b/src/runtime/time.go
@@ -116,6 +116,15 @@ func stopTimer(t *timer) bool {
 	return deltimer(t)
 }
 
+// resetTimer resets an inactive timer, adding it to the heap.
+//go:linkname resetTimer time.resetTimer
+func resetTimer(t *timer, when int64) {
+	if raceenabled {
+		racerelease(unsafe.Pointer(t))
+	}
+	resettimer(t, when)
+}
+
 // Go runtime.
 
 // Ready the goroutine arg.
@@ -236,6 +245,15 @@ func modtimer(t *timer, when, period int64, f func(interface{}, uintptr), arg in
 	}
 }
 
+// resettimer resets an existing inactive timer to turn it into an active timer,
+// with a new time for when the timer should fire.
+// This should be called instead of addtimer if the timer value has been,
+// or may have been, used previously.
+func resettimer(t *timer, when int64) {
+	t.when = when
+	addtimer(t)
+}
+
 // Timerproc runs the time-driven events.
 // It sleeps until the next event in the tb heap.
 // If addtimer inserts a new earlier event, it wakes timerproc early.