56 lines
1.2 KiB
Go
56 lines
1.2 KiB
Go
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package fasthttp
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import (
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"sync"
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"time"
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)
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func initTimer(t *time.Timer, timeout time.Duration) *time.Timer {
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if t == nil {
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return time.NewTimer(timeout)
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}
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if t.Reset(timeout) {
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// developer sanity-check
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panic("BUG: active timer trapped into initTimer()")
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}
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return t
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}
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func stopTimer(t *time.Timer) {
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if !t.Stop() {
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// Collect possibly added time from the channel
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// if timer has been stopped and nobody collected its value.
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select {
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case <-t.C:
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default:
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}
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}
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}
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// AcquireTimer returns a time.Timer from the pool and updates it to
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// send the current time on its channel after at least timeout.
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//
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// The returned Timer may be returned to the pool with ReleaseTimer
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// when no longer needed. This allows reducing GC load.
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func AcquireTimer(timeout time.Duration) *time.Timer {
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v := timerPool.Get()
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if v == nil {
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return time.NewTimer(timeout)
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}
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t := v.(*time.Timer)
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initTimer(t, timeout)
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return t
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}
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// ReleaseTimer returns the time.Timer acquired via AcquireTimer to the pool
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// and prevents the Timer from firing.
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//
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// Do not access the released time.Timer or read from its channel otherwise
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// data races may occur.
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func ReleaseTimer(t *time.Timer) {
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stopTimer(t)
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timerPool.Put(t)
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}
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var timerPool sync.Pool
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