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