/*

Copyright 2022 Huawei Cloud Computing Technologies Co., Ltd.

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.

*/

//nolint

package pool

import (

"container/list"

"sync"

"sync/atomic"

)

type ListPool struct {

pool *sync.Pool

hit int64

total int64

}

var listPool *ListPool

func init() {

listPool = &ListPool{

pool: new(sync.Pool),

}

}

func NewListPool() *ListPool {

return listPool

}

func (u *ListPool) Get() *list.List {

atomic.AddInt64(&u.total, 1)

v, ok := u.pool.Get().(*list.List)

if !ok || v == nil {

return list.New()

}

atomic.AddInt64(&u.hit, 1)

return v

}

func (u *ListPool) Put(v *list.List) {

v.Init()

u.pool.Put(v)

}

func (u *ListPool) HitRatio() float64 {

return float64(u.hit) / float64(u.total)

}