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bufferpool.go
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bufferpool.go
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/*
*
* Copyright 2020 waterdrop 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 xbuffer
import (
"bytes"
"sync"
)
// BufferPool buffer pool definition
type BufferPool struct {
//alloc sets the initial capacity of new buffers to minimize calls to make()
alloc int
pool *sync.Pool
}
// NewBufferPool creates a new BufferPool bounded to the given buffer size.
func NewBufferPool(alloc int) *BufferPool {
return &BufferPool{
alloc: alloc,
pool: &sync.Pool{
New: func() interface{} {
return bytes.NewBuffer(make([]byte, 0, alloc))
},
},
}
}
// Get gets a Buffer from the BufferPool
func (bp *BufferPool) Get() *bytes.Buffer {
buffer := bp.pool.Get().(*bytes.Buffer)
return buffer
}
// Put returns the given Buffer to the BufferPool
func (bp *BufferPool) Put(buffer *bytes.Buffer) {
if buffer.Cap() <= bp.alloc {
buffer.Reset()
bp.pool.Put(buffer)
}
}