/usr/share/gocode/src/code.google.com/p/go.net/ipv6/control_test.go is in golang-go.net-dev 0.0~hg20131201-1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 | // Copyright 2013 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 ipv6
import (
"sync"
"testing"
)
func TestControlFlags(t *testing.T) {
tf := FlagInterface | FlagPathMTU
opt := rawOpt{cflags: tf | FlagHopLimit}
// This loop runs methods of raw.Opt concurrently for testing
// concurrent access to the rawOpt. The first entry shold be
// opt.set and the last entry should be opt.clear.
tfns := []func(ControlFlags){opt.set, opt.clear, opt.clear}
ch := make(chan bool)
var wg sync.WaitGroup
for i, fn := range tfns {
wg.Add(1)
go func(i int, fn func(ControlFlags)) {
defer wg.Done()
switch i {
case 0:
close(ch)
case len(tfns) - 1:
<-ch
}
opt.Lock()
defer opt.Unlock()
fn(tf)
}(i, fn)
}
wg.Wait()
if opt.isset(tf) {
t.Fatalf("got %#x; expected %#x", opt.cflags, FlagHopLimit)
}
}
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