From eb48bfbbdaf3a99dbb861f251a73a3b6ae45cc8b Mon Sep 17 00:00:00 2001
From: Rob Pike <r@golang.org>
Date: Thu, 6 May 2010 11:50:47 -0700
Subject: runtime.GOMAXPROCS: hack it to have it return the old value.

R=rsc
CC=golang-dev
https://golang.org/cl/1140041
---
 src/pkg/runtime/extern.go | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

(limited to 'src/pkg/runtime/extern.go')

diff --git a/src/pkg/runtime/extern.go b/src/pkg/runtime/extern.go
index 1e284e8d71..72b43ae9bd 100644
--- a/src/pkg/runtime/extern.go
+++ b/src/pkg/runtime/extern.go
@@ -106,8 +106,10 @@ func LockOSThread()
 func UnlockOSThread()
 
 // GOMAXPROCS sets the maximum number of CPUs that can be executing
-// simultaneously.   This call will go away when the scheduler improves.
-func GOMAXPROCS(n int)
+// simultaneously and returns the previous setting.  If n < 1, it does not
+// change the current setting.
+// This call will go away when the scheduler improves.
+func GOMAXPROCS(n int) int
 
 // Cgocalls returns the number of cgo calls made by the current process.
 func Cgocalls() int64
-- 
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