mirror of
https://github.com/minio/minio.git
synced 2024-12-26 15:15:55 -05:00
78 lines
2.0 KiB
Go
78 lines
2.0 KiB
Go
// Original work https://github.com/oxtoacart/bpool borrowed
|
|
// only bpool.go licensed under Apache 2.0.
|
|
|
|
// This file modifies original bpool.go to add one more option
|
|
// to provide []byte capacity for better GC management.
|
|
|
|
/*
|
|
* MinIO Cloud Storage (C) 2018 MinIO, Inc.
|
|
*
|
|
* 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 bpool
|
|
|
|
// BytePoolCap implements a leaky pool of []byte in the form of a bounded channel.
|
|
type BytePoolCap struct {
|
|
c chan []byte
|
|
w int
|
|
wcap int
|
|
}
|
|
|
|
// NewBytePoolCap creates a new BytePool bounded to the given maxSize, with new
|
|
// byte arrays sized based on width.
|
|
func NewBytePoolCap(maxSize int, width int, capwidth int) (bp *BytePoolCap) {
|
|
return &BytePoolCap{
|
|
c: make(chan []byte, maxSize),
|
|
w: width,
|
|
wcap: capwidth,
|
|
}
|
|
}
|
|
|
|
// Get gets a []byte from the BytePool, or creates a new one if none are
|
|
// available in the pool.
|
|
func (bp *BytePoolCap) Get() (b []byte) {
|
|
select {
|
|
case b = <-bp.c:
|
|
// reuse existing buffer
|
|
default:
|
|
// create new buffer
|
|
if bp.wcap > 0 {
|
|
b = make([]byte, bp.w, bp.wcap)
|
|
} else {
|
|
b = make([]byte, bp.w)
|
|
}
|
|
}
|
|
return
|
|
}
|
|
|
|
// Put returns the given Buffer to the BytePool.
|
|
func (bp *BytePoolCap) Put(b []byte) {
|
|
select {
|
|
case bp.c <- b:
|
|
// buffer went back into pool
|
|
default:
|
|
// buffer didn't go back into pool, just discard
|
|
}
|
|
}
|
|
|
|
// Width returns the width of the byte arrays in this pool.
|
|
func (bp *BytePoolCap) Width() (n int) {
|
|
return bp.w
|
|
}
|
|
|
|
// WidthCap returns the cap width of the byte arrays in this pool.
|
|
func (bp *BytePoolCap) WidthCap() (n int) {
|
|
return bp.wcap
|
|
}
|