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
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
|
// Copyright 2018 Google LLC. All Rights Reserved.
//
// 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 clock
import "time"
// Timer represents an event that fires with time passage.
// See time.Timer type for intuition on how it works.
type Timer interface {
// Chan returns a channel which is used to deliver the event.
Chan() <-chan time.Time
// Stop prevents the Timer from firing. Returns false if the event has
// already fired, or the Timer has been stopped.
Stop() bool
}
// systemTimer is a Timer that uses system time.
type systemTimer struct {
*time.Timer
}
func (t systemTimer) Chan() <-chan time.Time {
return t.C
}
// fakeTimer implements Timer interface for testing. Event firing is controlled
// by FakeTimeSource which creates and owns fakeTimer instances.
type fakeTimer struct {
ts *FakeTimeSource
id int
when time.Time
ch chan time.Time
}
func newFakeTimer(ts *FakeTimeSource, id int, when time.Time) *fakeTimer {
ch := make(chan time.Time, 1)
return &fakeTimer{ts: ts, id: id, when: when, ch: ch}
}
func (t *fakeTimer) Chan() <-chan time.Time {
return t.ch
}
func (t *fakeTimer) Stop() bool {
return t.ts.unsubscribe(t.id)
}
func (t *fakeTimer) tryFire(now time.Time) bool {
if t.when.Before(now) || t.when.Equal(now) {
select {
case t.ch <- now:
return true
default:
}
}
return false
}
|
