From f50c3e956ffbeb15f3d386752805d1baf1c708df Mon Sep 17 00:00:00 2001
From: Russ Cox <rsc@swtch.com>
Date: Fri, 2 Apr 2010 14:53:13 -0700
Subject: devdraw: only one flushproc, please (OS X)

R=rsc
http://codereview.appspot.com/799045
---
 src/cmd/devdraw/osx-screen-carbon.m | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/cmd/devdraw/osx-screen-carbon.m b/src/cmd/devdraw/osx-screen-carbon.m
index d4720be7..6f3b4312 100644
--- a/src/cmd/devdraw/osx-screen-carbon.m
+++ b/src/cmd/devdraw/osx-screen-carbon.m
@@ -61,6 +61,7 @@ struct {
 	int kalting;		// last keystroke was Kalt
 	int touched;		// last mouse event was touchCallback
 	int collapsed;		// parked in dock
+	int flushing;		// flushproc has started
 	NSMutableArray* devicelist;
 } osx;
 
@@ -871,7 +872,10 @@ _flushmemscreen(Rectangle r)
 	qlock(&osx.flushlock);
 	if(osx.windowctx == nil){
 		QDBeginCGContext(GetWindowPort(osx.window), &osx.windowctx);
-		proccreate(flushproc, nil, 256*1024);
+		if(!osx.flushing) {
+			proccreate(flushproc, nil, 256*1024);
+			osx.flushing = 1;
+		}
 	}
 	
 	cgr.origin.x = r.min.x;
-- 
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