parent
e109836fef
commit
53d20a8a29
|
@ -0,0 +1,62 @@
|
||||||
|
/*
|
||||||
|
Copyright 2015 CoreOS, Inc.
|
||||||
|
|
||||||
|
Licensed under the Apache License, Version 2.0 (the "License");
|
||||||
|
you may not use this file except in compliance with the License.
|
||||||
|
You may obtain a copy of the License at
|
||||||
|
|
||||||
|
http://www.apache.org/licenses/LICENSE-2.0
|
||||||
|
|
||||||
|
Unless required by applicable law or agreed to in writing, software
|
||||||
|
distributed under the License is distributed on an "AS IS" BASIS,
|
||||||
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||||||
|
See the License for the specific language governing permissions and
|
||||||
|
limitations under the License.
|
||||||
|
*/
|
||||||
|
|
||||||
|
package wait
|
||||||
|
|
||||||
|
import (
|
||||||
|
"sync"
|
||||||
|
"time"
|
||||||
|
)
|
||||||
|
|
||||||
|
type WaitTime interface {
|
||||||
|
// Wait returns a chan that waits on the given deadline.
|
||||||
|
// The chan will be triggered when Trigger is called with a
|
||||||
|
// deadline that is later than the one it is waiting for.
|
||||||
|
// The given deadline MUST be unique. The deadline should be
|
||||||
|
// retrived by calling time.Now() in most cases.
|
||||||
|
Wait(deadline time.Time) <-chan struct{}
|
||||||
|
// Trigger triggers all the waiting chans with an earlier deadline.
|
||||||
|
Trigger(deadline time.Time)
|
||||||
|
}
|
||||||
|
|
||||||
|
type timeList struct {
|
||||||
|
l sync.Mutex
|
||||||
|
m map[int64]chan struct{}
|
||||||
|
}
|
||||||
|
|
||||||
|
func NewTimeList() *timeList {
|
||||||
|
return &timeList{m: make(map[int64]chan struct{})}
|
||||||
|
}
|
||||||
|
|
||||||
|
func (tl *timeList) Wait(deadline time.Time) <-chan struct{} {
|
||||||
|
tl.l.Lock()
|
||||||
|
defer tl.l.Unlock()
|
||||||
|
ch := make(chan struct{}, 1)
|
||||||
|
// The given deadline SHOULD be unique.
|
||||||
|
tl.m[deadline.UnixNano()] = ch
|
||||||
|
return ch
|
||||||
|
}
|
||||||
|
|
||||||
|
func (tl *timeList) Trigger(deadline time.Time) {
|
||||||
|
tl.l.Lock()
|
||||||
|
defer tl.l.Unlock()
|
||||||
|
for t, ch := range tl.m {
|
||||||
|
if t < deadline.UnixNano() {
|
||||||
|
delete(tl.m, t)
|
||||||
|
close(ch)
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
|
@ -0,0 +1,85 @@
|
||||||
|
/*
|
||||||
|
|
||||||
|
Copyright 2015 CoreOS, Inc.
|
||||||
|
|
||||||
|
Licensed under the Apache License, Version 2.0 (the "License");
|
||||||
|
you may not use this file except in compliance with the License.
|
||||||
|
You may obtain a copy of the License at
|
||||||
|
|
||||||
|
http://www.apache.org/licenses/LICENSE-2.0
|
||||||
|
|
||||||
|
Unless required by applicable law or agreed to in writing, software
|
||||||
|
distributed under the License is distributed on an "AS IS" BASIS,
|
||||||
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||||||
|
See the License for the specific language governing permissions and
|
||||||
|
limitations under the License.
|
||||||
|
*/
|
||||||
|
package wait
|
||||||
|
|
||||||
|
import (
|
||||||
|
"testing"
|
||||||
|
"time"
|
||||||
|
)
|
||||||
|
|
||||||
|
func TestWaitTime(t *testing.T) {
|
||||||
|
wt := NewTimeList()
|
||||||
|
ch1 := wt.Wait(time.Now())
|
||||||
|
t1 := time.Now()
|
||||||
|
wt.Trigger(t1)
|
||||||
|
select {
|
||||||
|
case <-ch1:
|
||||||
|
case <-time.After(10 * time.Millisecond):
|
||||||
|
t.Fatalf("cannot receive from ch as expected")
|
||||||
|
}
|
||||||
|
|
||||||
|
ch2 := wt.Wait(time.Now())
|
||||||
|
t2 := time.Now()
|
||||||
|
wt.Trigger(t1)
|
||||||
|
select {
|
||||||
|
case <-ch2:
|
||||||
|
t.Fatalf("unexpected to receive from ch")
|
||||||
|
case <-time.After(10 * time.Millisecond):
|
||||||
|
}
|
||||||
|
wt.Trigger(t2)
|
||||||
|
select {
|
||||||
|
case <-ch2:
|
||||||
|
case <-time.After(10 * time.Millisecond):
|
||||||
|
t.Fatalf("cannot receive from ch as expected")
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
func TestWaitTestStress(t *testing.T) {
|
||||||
|
chs := make([]<-chan struct{}, 0)
|
||||||
|
wt := NewTimeList()
|
||||||
|
for i := 0; i < 10000; i++ {
|
||||||
|
chs = append(chs, wt.Wait(time.Now()))
|
||||||
|
}
|
||||||
|
wt.Trigger(time.Now())
|
||||||
|
|
||||||
|
for _, ch := range chs {
|
||||||
|
select {
|
||||||
|
case <-ch:
|
||||||
|
case <-time.After(10 * time.Millisecond):
|
||||||
|
t.Fatalf("cannot receive from ch as expected")
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
func BenchmarkWaitTime(b *testing.B) {
|
||||||
|
t := time.Now()
|
||||||
|
wt := NewTimeList()
|
||||||
|
for i := 0; i < b.N; i++ {
|
||||||
|
wt.Wait(t)
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
func BenchmarkTriggerAnd10KWaitTime(b *testing.B) {
|
||||||
|
for i := 0; i < b.N; i++ {
|
||||||
|
t := time.Now()
|
||||||
|
wt := NewTimeList()
|
||||||
|
for j := 0; j < 10000; j++ {
|
||||||
|
wt.Wait(t)
|
||||||
|
}
|
||||||
|
wt.Trigger(time.Now())
|
||||||
|
}
|
||||||
|
}
|
Loading…
Reference in New Issue