mirror of
https://codeberg.org/forgejo/forgejo.git
synced 2024-12-17 12:12:46 -05:00
59 lines
1.4 KiB
Go
59 lines
1.4 KiB
Go
|
// Copyright 2015 PingCAP, 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,
|
||
|
|
// See the License for the specific language governing permissions and
|
||
|
|
// limitations under the License.
|
||
|
|
|
||
|
|
package kv
|
||
|
|
|
||
|
|
import (
|
||
|
|
"sync"
|
||
|
|
|
||
|
|
"github.com/ngaut/log"
|
||
|
|
)
|
||
|
|
|
||
|
|
// A cache holds a set of reusable objects.
|
||
|
|
// The slice is a stack (LIFO).
|
||
|
|
// If more are needed, the cache creates them by calling new.
|
||
|
|
type cache struct {
|
||
|
|
mu sync.Mutex
|
||
|
|
name string
|
||
|
|
saved []MemBuffer
|
||
|
|
// factory
|
||
|
|
fact func() MemBuffer
|
||
|
|
}
|
||
|
|
|
||
|
|
func (c *cache) put(x MemBuffer) {
|
||
|
|
c.mu.Lock()
|
||
|
|
if len(c.saved) < cap(c.saved) {
|
||
|
|
c.saved = append(c.saved, x)
|
||
|
|
} else {
|
||
|
|
log.Warnf("%s is full, size: %d, you may need to increase pool size", c.name, len(c.saved))
|
||
|
|
}
|
||
|
|
c.mu.Unlock()
|
||
|
|
}
|
||
|
|
|
||
|
|
func (c *cache) get() MemBuffer {
|
||
|
|
c.mu.Lock()
|
||
|
|
n := len(c.saved)
|
||
|
|
if n == 0 {
|
||
|
|
c.mu.Unlock()
|
||
|
|
return c.fact()
|
||
|
|
}
|
||
|
|
x := c.saved[n-1]
|
||
|
|
c.saved = c.saved[0 : n-1]
|
||
|
|
c.mu.Unlock()
|
||
|
|
return x
|
||
|
|
}
|
||
|
|
|
||
|
|
func newCache(name string, cap int, fact func() MemBuffer) *cache {
|
||
|
|
return &cache{name: name, saved: make([]MemBuffer, 0, cap), fact: fact}
|
||
|
|
}
|