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timer.go
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timer.go
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// Copyright (C) 2020-2021, IrineSistiana
//
// This file is part of mosdns.
//
// mosdns is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// mosdns is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <https://www.gnu.org/licenses/>.
package pool
import (
"sync"
"time"
)
var (
timerPool = sync.Pool{}
)
func GetTimer(t time.Duration) *time.Timer {
timer, ok := timerPool.Get().(*time.Timer)
if !ok {
return time.NewTimer(t)
}
if timer.Reset(t) {
panic("dispatcher.go getTimer: active timer trapped in timerPool")
}
return timer
}
func ReleaseTimer(timer *time.Timer) {
if !timer.Stop() {
select {
case <-timer.C:
default:
}
}
timerPool.Put(timer)
}
func ResetAndDrainTimer(timer *time.Timer, d time.Duration) {
if !timer.Stop() {
select {
case <-timer.C:
default:
}
}
timer.Reset(d)
}