package timerpool

import (
	"sync"
	"time"
)

// Get returns a timer for the given duration d from the pool.
//
// Return back the timer to the pool with Put.
func Get(d time.Duration) *time.Timer {
	if v := timerPool.Get(); v != nil {
		t := v.(*time.Timer)
		// any receive from t.C after Reset has returned is guaranteed not
		// to receive a time value corresponding to the previous timer settings
		t.Reset(d)
		return t
	}
	return time.NewTimer(d)
}

// Put returns t to the pool.
//
// t cannot be accessed after returning to the pool.
func Put(t *time.Timer) {
	t.Stop()
	timerPool.Put(t)
}

var timerPool sync.Pool