From 7c616b3809724874c15be762ab9dd15d9ee86406 Mon Sep 17 00:00:00 2001
From: Ian Lance Taylor <iant@golang.org>
Date: Fri, 25 Mar 2011 10:36:22 -0700
Subject: [PATCH] runtime: always set *received in chanrecv.

Also fix comment.

The only caller of chanrecv initializes the value to false, so
this patch makes no difference at present.  But it seems like
the right thing to do.

R=rsc
CC=golang-dev
https://golang.org/cl/4312053
---
 src/pkg/runtime/chan.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/pkg/runtime/chan.c b/src/pkg/runtime/chan.c
index 9630c436f6..abb1b690dd 100644
--- a/src/pkg/runtime/chan.c
+++ b/src/pkg/runtime/chan.c
@@ -366,6 +366,8 @@ asynch:
 		if(selected != nil) {
 			runtime·unlock(c);
 			*selected = false;
+			if(received != nil)
+				*received = false;
 			return;
 		}
 		sg = allocsg(c);
@@ -521,7 +523,7 @@ runtime·selectnbrecv(byte *v, Hchan *c, bool selected)
 // compiler implements
 //
 //	select {
-//	case v = <-c:
+//	case v, ok = <-c:
 //		... foo
 //	default:
 //		... bar
@@ -529,7 +531,7 @@ runtime·selectnbrecv(byte *v, Hchan *c, bool selected)
 //
 // as
 //
-//	if c != nil && selectnbrecv(&v, c) {
+//	if c != nil && selectnbrecv2(&v, &ok, c) {
 //		... foo
 //	} else {
 //		... bar
-- 
2.50.0