Source File
	timer.go

Belonging Package
	github.com/cenkalti/backoff/v4

package backoff

import "time"

type Timer interface {
	Start(duration time.Duration)
	Stop()
	C() <-chan time.Time
}

// defaultTimer implements Timer interface using time.Timer
type defaultTimer struct {
	timer *time.Timer
}

// C returns the timers channel which receives the current time when the timer fires.
func (t *defaultTimer) C() <-chan time.Time {
	return t.timer.C
}

// Start starts the timer to fire after the given duration
func (t *defaultTimer) Start(duration time.Duration) {
	if t.timer == nil {
		t.timer = time.NewTimer(duration)
	} else {
		t.timer.Reset(duration)
	}
}

// Stop is called when the timer is not used anymore and resources may be freed.
func (t *defaultTimer) Stop() {
	if t.timer != nil {
		t.timer.Stop()
	}
}

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