mirror of
https://github.com/golang/go
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47 lines
831 B
Go
47 lines
831 B
Go
// Copyright 2011 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package cgotest
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/*
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#include <unistd.h>
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extern void BackgroundSleep(int);
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void twoSleep(int n) {
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BackgroundSleep(n);
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sleep(n);
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}
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*/
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import "C"
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import (
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"testing"
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"time"
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)
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var sleepDone = make(chan bool)
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func parallelSleep(n int) {
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C.twoSleep(C.int(n))
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<-sleepDone
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}
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//export BackgroundSleep
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func BackgroundSleep(n int) {
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go func() {
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C.sleep(C.uint(n))
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sleepDone <- true
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}()
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}
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func TestParallelSleep(t *testing.T) {
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dt := -time.Nanoseconds()
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parallelSleep(1)
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dt += time.Nanoseconds()
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// bug used to run sleeps in serial, producing a 2-second delay.
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if dt >= 1.3e9 {
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t.Fatalf("parallel 1-second sleeps slept for %f seconds", float64(dt)/1e9)
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}
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}
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