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buf.go
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buf.go
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// Copyright 2018 fatedier, fatedier@gmail.com
//
// 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 pool
import (
"sync"
)
var (
bufPool16k sync.Pool
bufPool5k sync.Pool
bufPool2k sync.Pool
bufPool1k sync.Pool
bufPool sync.Pool
)
func GetBuf(size int) []byte {
var x interface{}
if size >= 16*1024 {
x = bufPool16k.Get()
} else if size >= 5*1024 {
x = bufPool5k.Get()
} else if size >= 2*1024 {
x = bufPool2k.Get()
} else if size >= 1*1024 {
x = bufPool1k.Get()
} else {
x = bufPool.Get()
}
if x == nil {
return make([]byte, size)
}
buf := x.([]byte)
if cap(buf) < size {
return make([]byte, size)
}
return buf[:size]
}
func PutBuf(buf []byte) {
size := cap(buf)
if size >= 16*1024 {
bufPool16k.Put(buf)
} else if size >= 5*1024 {
bufPool5k.Put(buf)
} else if size >= 2*1024 {
bufPool2k.Put(buf)
} else if size >= 1*1024 {
bufPool1k.Put(buf)
} else {
bufPool.Put(buf)
}
}