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105 lines
2.5 KiB
Go
105 lines
2.5 KiB
Go
/*
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Copyright 2014 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package clock
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import "time"
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// PassiveClock allows for injecting fake or real clocks into code
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// that needs to read the current time but does not support scheduling
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// activity in the future.
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type PassiveClock interface {
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Now() time.Time
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Since(time.Time) time.Duration
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}
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// Clock allows for injecting fake or real clocks into code that
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// needs to do arbitrary things based on time.
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type Clock interface {
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PassiveClock
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After(d time.Duration) <-chan time.Time
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NewTimer(d time.Duration) Timer
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Sleep(d time.Duration)
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Tick(d time.Duration) <-chan time.Time
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}
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var _ = Clock(RealClock{})
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// RealClock really calls time.Now()
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type RealClock struct{}
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// Now returns the current time.
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func (RealClock) Now() time.Time {
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return time.Now()
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}
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// Since returns time since the specified timestamp.
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func (RealClock) Since(ts time.Time) time.Duration {
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return time.Since(ts)
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}
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// After is the same as time.After(d).
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func (RealClock) After(d time.Duration) <-chan time.Time {
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return time.After(d)
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}
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// NewTimer is the same as time.NewTimer(d)
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func (RealClock) NewTimer(d time.Duration) Timer {
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return &realTimer{
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timer: time.NewTimer(d),
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}
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}
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// Tick is the same as time.Tick(d)
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func (RealClock) Tick(d time.Duration) <-chan time.Time {
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return time.Tick(d)
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}
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// Sleep is the same as time.Sleep(d)
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func (RealClock) Sleep(d time.Duration) {
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time.Sleep(d)
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}
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// Timer allows for injecting fake or real timers into code that
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// needs to do arbitrary things based on time.
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type Timer interface {
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C() <-chan time.Time
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Stop() bool
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Reset(d time.Duration) bool
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}
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var _ = Timer(&realTimer{})
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// realTimer is backed by an actual time.Timer.
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type realTimer struct {
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timer *time.Timer
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}
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// C returns the underlying timer's channel.
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func (r *realTimer) C() <-chan time.Time {
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return r.timer.C
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}
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// Stop calls Stop() on the underlying timer.
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func (r *realTimer) Stop() bool {
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return r.timer.Stop()
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}
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// Reset calls Reset() on the underlying timer.
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func (r *realTimer) Reset(d time.Duration) bool {
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return r.timer.Reset(d)
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}
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