blob: 229c7d41f65d32962c9e76c66d086090595ada5a (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
|
// Copyright (c) 2013, Suryandaru Triandana <syndtr@gmail.com>
// All rights reserved.
//
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Package util provides utilities used throughout leveldb.
package util
import (
"errors"
)
var (
ErrNotFound = errors.New("leveldb: not found")
)
// Releaser is the interface that wraps the basic Release method.
type Releaser interface {
// Release releases associated resources. Release should always success
// and can be called multipe times without causing error.
Release()
}
// ReleaseSetter is the interface that wraps the basic SetReleaser method.
type ReleaseSetter interface {
// SetReleaser associates the given releaser to the resources. The
// releaser will be called once coresponding resources released.
// Calling SetReleaser with nil will clear the releaser.
SetReleaser(releaser Releaser)
}
// BasicReleaser provides basic implementation of Releaser and ReleaseSetter.
type BasicReleaser struct {
releaser Releaser
}
// Release implements Releaser.Release.
func (r *BasicReleaser) Release() {
if r.releaser != nil {
r.releaser.Release()
r.releaser = nil
}
}
// SetReleaser implements ReleaseSetter.SetReleaser.
func (r *BasicReleaser) SetReleaser(releaser Releaser) {
r.releaser = releaser
}
|