func siftupTimer(t []*timer, i int) bool {
	if i >= len(t) {
		return false
	}
	when := t[i].when
	tmp := t[i]
	for i > 0 {
		p := (i - 1) / 4 // parent
		if when >= t[p].when {
			break
		}
		t[i] = t[p]
		t[i].i = i
		i = p
	}
	if tmp != t[i] {
		t[i] = tmp
		t[i].i = i
	}
	return true
}
// Heap maintenance algorithms.
// These algorithms check for slice index errors manually.
// Slice index error can happen if the program is using racy
// access to timers. We don't want to panic here, because
// it will cause the program to crash with a mysterious
// "panic holding locks" message. Instead, we panic while not
// holding a lock.
// The races can occur despite the bucket locks because assignBucket
// itself is called without locks, so racy calls can cause a timer to
// change buckets while executing these functions.
Heap maintenance algorithms.
These algorithms check for slice index errors manually.
Slice index error can happen if the program is using racy
access to timers. We don't want to panic here, because
it will cause the program to crash with a mysterious
"panic holding locks" message. Instead, we panic while not
holding a lock.
The races can occur despite the bucket locks because assignBucket
itself is called without locks, so racy calls can cause a timer to
change buckets while executing these functions.
// Heap maintenance algorithms . // These algorithms check for slice index errors manually . // Slice index error can happen if the program is using racy // access to timers . We don ' t want to panic here because // it will cause the program to crash with a mysterious // " panic holding locks " message . Instead we panic while not // holding a lock . // The races can occur despite the bucket locks because assignBucket // itself is called without locks so racy calls can cause a timer to // change buckets while executing these functions .
func siftupTimer(t []*timer, i int) bool {
	if i >= len(t) {
		return false
	}
	when := t[i].when
	tmp := t[i]
	for i > 0 {
		p := (i - 1) / 4 
		if when >= t[p].when {
			break
		}
		t[i] = t[p]
		t[i].i = i
		i = p
	}
	if tmp != t[i] {
		t[i] = tmp
		t[i].i = i
	}
	return true
}
func siftupTimer ( t [ ] * timer , i int ) bool { if i >= len ( t ) { return false } when := t [ i ] . when tmp := t [ i ] for i > 0 { p := ( i - 1 ) / 4 if when >= t [ p ] . when { break } t [ i ] = t [ p ] t [ i ] . i = i i = p } if tmp != t [ i ] { t [ i ] = tmp t [ i ] . i = i } return true }
Heap maintenance algorithms.
Heap maintenance algorithms .
// parent