rate: add documentation on Limiter concurrent usage
Closes golang/go#17261
Change-Id: Ifeacc8df45fb59e7781ddcc35c2fde0aa80188eb
Reviewed-on: https://go-review.googlesource.com/c/time/+/530855
Auto-Submit: Sameer Ajmani <sameer@golang.org>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
Reviewed-by: Sameer Ajmani <sameer@golang.org>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
diff --git a/rate/rate.go b/rate/rate.go
index f0e0cf3..8f6c7f4 100644
--- a/rate/rate.go
+++ b/rate/rate.go
@@ -52,6 +52,8 @@
// or its associated context.Context is canceled.
//
// The methods AllowN, ReserveN, and WaitN consume n tokens.
+//
+// Limiter is safe for simultaneous use by multiple goroutines.
type Limiter struct {
mu sync.Mutex
limit Limit
