| // 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> |
| |
| unsigned int sleep(unsigned int seconds); |
| |
| 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) { |
| start := time.Now() |
| parallelSleep(1) |
| dt := time.Now().Sub(start) |
| // bug used to run sleeps in serial, producing a 2-second delay. |
| if dt >= 1300*time.Millisecond { |
| t.Fatalf("parallel 1-second sleeps slept for %f seconds", dt.Seconds()) |
| } |
| } |
