From: Rob Pike <r@golang.org>
Date: Wed, 22 Aug 2012 21:36:23 +0000 (-0700)
Subject: time: avoid data race in abs
X-Git-Tag: go1.1rc2~2608
X-Git-Url: http://www.git.cypherpunks.su/?a=commitdiff_plain;h=84a5a9b558fbe1a4d20d1be822eefa1fd504d8df;p=gostls13.git

time: avoid data race in abs
Fixes #3967.

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/6460115
---

diff --git a/src/pkg/time/time.go b/src/pkg/time/time.go
index f898284621..ef966c3ef0 100644
--- a/src/pkg/time/time.go
+++ b/src/pkg/time/time.go
@@ -241,10 +241,10 @@ func (t Time) IsZero() bool {
 // It is called when computing a presentation property like Month or Hour.
 func (t Time) abs() uint64 {
 	l := t.loc
-	if l == nil {
-		l = &utcLoc
+	// Avoid function calls when possible.
+	if l == nil || l == &localLoc {
+		l = l.get()
 	}
-	// Avoid function call if we hit the local time cache.
 	sec := t.sec + internalToUnix
 	if l != &utcLoc {
 		if l.cacheZone != nil && l.cacheStart <= sec && sec < l.cacheEnd {