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// Copyright 2009 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.
// +build darwin freebsd linux netbsd openbsd
package signal
import (
"os"
"runtime"
"syscall"
"testing"
"time"
)
const sighup = syscall.SIGHUP
func waitSig(t *testing.T, c <-chan os.Signal, sig os.Signal) {
select {
case s := <-c:
if s != sig {
t.Fatalf("signal was %v, want %v", s, sig)
}
case <-time.After(1 * time.Second):
t.Fatalf("timeout waiting for %v", sig)
}
}
func TestSignal(t *testing.T) {
// Ask for SIGHUP
c := make(chan os.Signal, 1)
Notify(c, sighup)
t.Logf("sighup...")
// Send this process a SIGHUP
syscall.Kill(syscall.Getpid(), sighup)
waitSig(t, c, sighup)
// Ask for everything we can get.
c1 := make(chan os.Signal, 1)
Notify(c1)
t.Logf("sigwinch...")
// Send this process a SIGWINCH
syscall.Kill(syscall.Getpid(), syscall.SIGWINCH)
waitSig(t, c1, syscall.SIGWINCH)
// Send two more SIGHUPs, to make sure that
// they get delivered on c1 and that not reading
// from c does not block everything.
t.Logf("sigwinch...")
syscall.Kill(syscall.Getpid(), syscall.SIGHUP)
waitSig(t, c1, syscall.SIGHUP)
t.Logf("sigwinch...")
syscall.Kill(syscall.Getpid(), syscall.SIGHUP)
waitSig(t, c1, syscall.SIGHUP)
// The first SIGHUP should be waiting for us on c.
waitSig(t, c, syscall.SIGHUP)
}
func TestStress(t *testing.T) {
dur := 3 * time.Second
if testing.Short() {
dur = 100 * time.Millisecond
}
defer runtime.GOMAXPROCS(runtime.GOMAXPROCS(4))
done := make(chan bool)
finished := make(chan bool)
go func() {
sig := make(chan os.Signal, 1)
Notify(sig, syscall.SIGUSR1)
Loop:
for {
select {
case <-sig:
case <-done:
break Loop
}
}
finished <- true
}()
go func() {
Loop:
for {
select {
case <-done:
break Loop
default:
syscall.Kill(syscall.Getpid(), syscall.SIGUSR1)
runtime.Gosched()
}
}
finished <- true
}()
time.Sleep(dur)
close(done)
<-finished
<-finished
}
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