1 files changed, 46 insertions, 0 deletions
diff --git a/misc/cgo/test/issue1560.go b/misc/cgo/test/issue1560.go
new file mode 100644
index 000000000..75d31c035
--- /dev/null
+++ b/misc/cgo/test/issue1560.go
@@ -0,0 +1,46 @@
+// Copyright 2011 The Go Authors.  All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package cgotest
+
+/*
+#include <unistd.h>
+
+extern void BackgroundSleep(int);
+void twoSleep(int n) {
+	BackgroundSleep(n);
+	sleep(n);
+}
+*/
+import "C"
+
+import (
+	"testing"
+	"time"
+)
+
+var sleepDone = make(chan bool)
+
+func parallelSleep(n int) {
+	C.twoSleep(C.int(n))
+	<-sleepDone
+}
+
+//export BackgroundSleep
+func BackgroundSleep(n int) {
+	go func() {
+		C.sleep(C.uint(n))
+		sleepDone <- true
+	}()
+}
+
+func TestParallelSleep(t *testing.T) {
+	dt := -time.Nanoseconds()
+	parallelSleep(1)
+	dt += time.Nanoseconds()
+	// bug used to run sleeps in serial, producing a 2-second delay.
+	if dt >= 1.3e9 {
+		t.Fatalf("parallel 1-second sleeps slept for %f seconds", float64(dt)/1e9)
+	}
+}