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gunzip.go
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gunzip.go
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// Copyright 2015-present, Cyrill @ Schumacher.fm and the CoreStore contributors
//
// 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 gzippool
import (
"compress/gzip"
"io"
"sync"
)
var readerPool = &tankReader{}
// GetReader returns a new gzip reader for decompression.
func GetReader(r io.Reader) *gzip.Reader {
return readerPool.Get(r)
}
// PutReader returns a reader to the pool.
func PutReader(zr *gzip.Reader) {
readerPool.Put(zr)
}
type tankReader struct {
p sync.Pool
}
func (t *tankReader) Get(r io.Reader) (zr *gzip.Reader) {
if zrr := t.p.Get(); zrr != nil {
zr = zrr.(*gzip.Reader)
zr.Reset(r)
} else {
zr, _ = gzip.NewReader(r)
}
return zr
}
func (t *tankReader) Put(zr *gzip.Reader) {
zr.Close()
t.p.Put(zr)
}