Files
opencloud/vendor/github.com/blevesearch/geo/s2/buffer_pool.go
dependabot[bot] 0f2838e525 Bump github.com/blevesearch/bleve/v2 from 2.3.9 to 2.3.10
Bumps [github.com/blevesearch/bleve/v2](https://github.com/blevesearch/bleve) from 2.3.9 to 2.3.10.
- [Release notes](https://github.com/blevesearch/bleve/releases)
- [Commits](https://github.com/blevesearch/bleve/compare/v2.3.9...v2.3.10)

---
updated-dependencies:
- dependency-name: github.com/blevesearch/bleve/v2
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
2023-09-27 09:59:49 +02:00

70 lines
1.8 KiB
Go

// Copyright (c) 2023 Couchbase, 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 s2
// GeoBufferPool represents a pool of buffers ranging from a given
// max size to a min size in steps of 2. It uses a lazy approach only allocating
// the buffers when it is needed.
type GeoBufferPool struct {
buffers [][]byte
maxSize int
minSize int
}
func NewGeoBufferPool(maxSize int, minSize int) *GeoBufferPool {
// Calculating the number of buffers required. Assuming that
// the value of minSize is correct, the buffers will be of size
// minSize, 2 * minSize, 4 * minSize and so on till it is less
// than or equal to the maxSize. If it is not equal to maxSize,
// then a suitable value less than maxSize will be set as maxSize
length := 0
temp := minSize
for temp <= maxSize {
length = length + 1
temp = temp * 2
}
maxSize = temp / 2
return &GeoBufferPool{
buffers: make([][]byte, length),
maxSize: maxSize,
minSize: minSize,
}
}
func (b *GeoBufferPool) Get(size int) ([]byte) {
if b == nil {
// GeoBufferPool not setup
return make([]byte, size)
}
bufSize := b.minSize
for i := range b.buffers {
if size <= bufSize || i == len(b.buffers) - 1 {
if b.buffers[i] == nil {
b.buffers[i] = make([]byte, bufSize)
}
return b.buffers[i]
}
bufSize = bufSize * 2
}
return nil
}