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extent_dirtylist.go
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/
extent_dirtylist.go
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// Copyright 2018 The Chubao 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 stream
import (
"container/list"
"sync"
)
// DirtyExtentList defines the struct of the dirty extent list.
type DirtyExtentList struct {
sync.RWMutex
list *list.List
}
// NewDirtyExtentList returns a new DirtyExtentList instance.
func NewDirtyExtentList() *DirtyExtentList {
return &DirtyExtentList{
list: list.New(),
}
}
// Put puts a new extent handler into the dirty extent list.
func (dl *DirtyExtentList) Put(eh *ExtentHandler) {
dl.Lock()
defer dl.Unlock()
dl.list.PushBack(eh)
}
// Get gets the next element in the dirty extent list.
func (dl *DirtyExtentList) Get() *list.Element {
dl.RLock()
defer dl.RUnlock()
return dl.list.Front()
}
// Remove removes the element from the dirty extent list.
func (dl *DirtyExtentList) Remove(e *list.Element) {
dl.Lock()
defer dl.Unlock()
dl.list.Remove(e)
}
// Len returns the size of the dirty extent list.
func (dl *DirtyExtentList) Len() int {
dl.RLock()
defer dl.RUnlock()
return dl.list.Len()
}