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// 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)
}
}
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