From 4b74894536813fbc8f59136a6f77a3d5f9af67eb Mon Sep 17 00:00:00 2001
From: Pietro Gagliardi <pietro10@mac.com>
Date: Mon, 21 Dec 2015 14:26:09 -0500
Subject: [PATCH] Made QueueMain() immune to collisions.

---
 main.go | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/main.go b/main.go
index 5f8f624..de7b1ca 100644
--- a/main.go
+++ b/main.go
@@ -83,8 +83,14 @@ func QueueMain(f func()) {
 	qmlock.Lock()
 	defer qmlock.Unlock()
 
-	n := qmcurrent
-	qmcurrent++
+	n := uintptr(0)
+	for {
+		n = qmcurrent
+		qmcurrent++
+		if qmmap[n] == nil {
+			break
+		}
+	}
 	qmmap[n] = f
 	C.realQueueMain(unsafe.Pointer(n))
 }