73 lines
2 KiB
Go
73 lines
2 KiB
Go
// Copyright (c) 2015-2021 MinIO, Inc.
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//
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// This file is part of MinIO Object Storage stack
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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package bpool
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// BytePoolCap implements a leaky pool of []byte in the form of a bounded channel.
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type BytePoolCap struct {
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c chan []byte
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w int
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wcap int
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}
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// NewBytePoolCap creates a new BytePool bounded to the given maxSize, with new
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// byte arrays sized based on width.
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func NewBytePoolCap(maxSize int, width int, capwidth int) (bp *BytePoolCap) {
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return &BytePoolCap{
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c: make(chan []byte, maxSize),
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w: width,
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wcap: capwidth,
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}
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}
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// Get gets a []byte from the BytePool, or creates a new one if none are
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// available in the pool.
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func (bp *BytePoolCap) Get() (b []byte) {
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select {
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case b = <-bp.c:
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// reuse existing buffer
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default:
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// create new buffer
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if bp.wcap > 0 {
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b = make([]byte, bp.w, bp.wcap)
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} else {
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b = make([]byte, bp.w)
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}
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}
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return
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}
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// Put returns the given Buffer to the BytePool.
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func (bp *BytePoolCap) Put(b []byte) {
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select {
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case bp.c <- b:
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// buffer went back into pool
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default:
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// buffer didn't go back into pool, just discard
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}
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}
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// Width returns the width of the byte arrays in this pool.
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func (bp *BytePoolCap) Width() (n int) {
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return bp.w
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}
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// WidthCap returns the cap width of the byte arrays in this pool.
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func (bp *BytePoolCap) WidthCap() (n int) {
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return bp.wcap
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}
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