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package main
import (
"time"
)
type Timer struct {
pending AtomicBool
timer *time.Timer
}
/* Starts the timer if not already pending
*/
func (t *Timer) Start(dur time.Duration) bool {
set := t.pending.Swap(true)
if !set {
t.timer.Reset(dur)
return true
}
return false
}
/* Stops the timer
*/
func (t *Timer) Stop() {
set := t.pending.Swap(true)
if set {
t.timer.Stop()
select {
case <-t.timer.C:
default:
}
}
t.pending.Set(false)
}
func (t *Timer) Pending() bool {
return t.pending.Get()
}
func (t *Timer) Reset(dur time.Duration) {
t.pending.Set(false)
t.Start(dur)
}
func (t *Timer) Push(dur time.Duration) {
if t.pending.Get() {
t.Reset(dur)
}
}
func (t *Timer) Wait() <-chan time.Time {
return t.timer.C
}
func NewTimer() (t Timer) {
t.pending.Set(false)
t.timer = time.NewTimer(0)
t.timer.Stop()
select {
case <-t.timer.C:
default:
}
return
}
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