From: Robert Daniel Kortschak <dan.kortschak@adelaide.edu.au>
Date: Thu, 29 Aug 2013 07:14:57 +0000 (+1000)
Subject: net: make channel-based semaphore depend on receive, not send
X-Git-Tag: go1.2rc2~396
X-Git-Url: http://www.git.cypherpunks.su/?a=commitdiff_plain;h=b3fd434ae07db5cf6385fb6b97a467e6f312c253;p=gostls13.git

net: make channel-based semaphore depend on receive, not send

R=r, dvyukov
CC=golang-dev
https://golang.org/cl/13348045
---

diff --git a/src/pkg/net/net.go b/src/pkg/net/net.go
index c918e96b43..4f177c64ed 100644
--- a/src/pkg/net/net.go
+++ b/src/pkg/net/net.go
@@ -442,10 +442,16 @@ func (d *deadline) setTime(t time.Time) {
 
 var threadLimit = make(chan struct{}, 500)
 
+func init() {
+	for i := 0; i < cap(threadLimit); i++ {
+		threadLimit <- struct{}{}
+	}
+}
+
 func acquireThread() {
-	threadLimit <- struct{}{}
+	<-threadLimit
 }
 
 func releaseThread() {
-	<-threadLimit
+	threadLimit <- struct{}{}
 }