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package clock
import "time"
type Clock interface {
Now() time.Time
Sleep(d time.Duration)
Since(t time.Time) time.Duration
// After waits for the duration to elapse and then sends the current time
// on the returned channel.
// It is equivalent to clock.NewTimer(d).C.
// The underlying Timer is not recovered by the garbage collector
// until the timer fires. If efficiency is a concern, use clock.NewTimer
// instead and call Timer.Stop if the timer is no longer needed.
After(d time.Duration) <-chan time.Time
NewTimer(d time.Duration) Timer
NewTicker(d time.Duration) Ticker
}
type realClock struct{}
func NewClock() Clock {
return &realClock{}
}
func (clock *realClock) Now() time.Time {
return time.Now()
}
func (clock *realClock) Since(t time.Time) time.Duration {
return time.Now().Sub(t)
}
func (clock *realClock) Sleep(d time.Duration) {
<-clock.NewTimer(d).C()
}
func (clock *realClock) After(d time.Duration) <-chan time.Time {
return clock.NewTimer(d).C()
}
func (clock *realClock) NewTimer(d time.Duration) Timer {
return &realTimer{
t: time.NewTimer(d),
}
}
func (clock *realClock) NewTicker(d time.Duration) Ticker {
return &realTicker{
t: time.NewTicker(d),
}
}
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