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40 lines
784 B
40 lines
784 B
package common
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import "time"
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/*
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RepeatTimer repeatedly sends a struct{}{} to .Ch after each "dur" period.
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It's good for keeping connections alive.
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*/
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type RepeatTimer struct {
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Ch chan struct{}
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quit chan struct{}
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dur time.Duration
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timer *time.Timer
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}
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func NewRepeatTimer(dur time.Duration) *RepeatTimer {
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var ch = make(chan struct{})
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var quit = make(chan struct{})
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var t = &RepeatTimer{Ch: ch, dur: dur, quit: quit}
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t.timer = time.AfterFunc(dur, t.fireRoutine)
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return t
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}
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func (t *RepeatTimer) fireRoutine() {
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select {
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case t.Ch <- struct{}{}:
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t.timer.Reset(t.dur)
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case <-t.quit:
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}
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}
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// Wait the duration again before firing.
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func (t *RepeatTimer) Reset() {
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t.timer.Reset(t.dur)
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}
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func (t *RepeatTimer) Stop() bool {
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close(t.quit)
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return t.timer.Stop()
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}
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