tree dcc43a145d324d76c63207a49c36870994a453c1
parent 316e794f7b5e3df4e95175a45a5fb8b12f85cb4f
author Matt Layher <mdlayher@gmail.com> 1475621397 -0400
committer Brad Fitzpatrick <bradfitz@golang.org> 1475624180 +0000

singleflight: copy from internal/singleflight in standard library

Updates golang/go#17338

Change-Id: Icf1972cdec0bbc9b3142141d9e706c07f312efc0
Reviewed-on: https://go-review.googlesource.com/30292
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>