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lease_queue.go
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lease_queue.go
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// Copyright 2018 The etcd Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package lease
// LeaseWithTime contains lease object with expire information.
type LeaseWithTime struct {
id LeaseID
expiration int64
index int
}
type LeaseQueue []*LeaseWithTime
func (pq LeaseQueue) Len() int { return len(pq) }
func (pq LeaseQueue) Less(i, j int) bool {
return pq[i].expiration < pq[j].expiration
}
func (pq LeaseQueue) Swap(i, j int) {
pq[i], pq[j] = pq[j], pq[i]
pq[i].index = i
pq[j].index = j
}
func (pq *LeaseQueue) Push(x interface{}) {
n := len(*pq)
item := x.(*LeaseWithTime)
item.index = n
*pq = append(*pq, item)
}
func (pq *LeaseQueue) Pop() interface{} {
old := *pq
n := len(old)
item := old[n-1]
item.index = -1 // for safety
*pq = old[0 : n-1]
return item
}