go.chromium.org/luci@v0.0.0-20240309015107-7cdc2e660f33/common/data/chunkstream/chunkNode.go (about)

     1  // Copyright 2015 The LUCI Authors.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //      http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package chunkstream
    16  
    17  import (
    18  	"sync"
    19  )
    20  
    21  var chunkNodePool = sync.Pool{
    22  	New: func() any {
    23  		return &chunkNode{}
    24  	},
    25  }
    26  
    27  func newChunkNode(c Chunk) *chunkNode {
    28  	n := chunkNodePool.Get().(*chunkNode)
    29  	n.Chunk = c
    30  	return n
    31  }
    32  
    33  // chunkNode wraps a Chunk interface in a linked-list node.
    34  type chunkNode struct {
    35  	Chunk
    36  
    37  	next *chunkNode
    38  }
    39  
    40  func (n *chunkNode) release() {
    41  	n.Chunk.Release()
    42  	n.Chunk = nil
    43  	n.next = nil
    44  	chunkNodePool.Put(n)
    45  }
    46  
    47  func (n *chunkNode) length() int {
    48  	return len(n.Bytes())
    49  }