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
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
|
// Copyright 2015 Tim Heckman. All rights reserved.
// Copyright 2018 The Gofrs. All rights reserved.
// Use of this source code is governed by the BSD 3-Clause
// license that can be found in the LICENSE file.
package flock_test
import (
"context"
"fmt"
"os"
"time"
"github.com/gofrs/flock"
)
func ExampleFlock_Locked() {
f := flock.New(os.TempDir() + "/go-lock.lock")
f.TryLock() // unchecked errors here
fmt.Printf("locked: %v\n", f.Locked())
f.Unlock()
fmt.Printf("locked: %v\n", f.Locked())
// Output: locked: true
// locked: false
}
func ExampleFlock_TryLock() {
// should probably put these in /var/lock
fileLock := flock.New(os.TempDir() + "/go-lock.lock")
locked, err := fileLock.TryLock()
if err != nil {
// handle locking error
}
if locked {
fmt.Printf("path: %s; locked: %v\n", fileLock.Path(), fileLock.Locked())
if err := fileLock.Unlock(); err != nil {
// handle unlock error
}
}
fmt.Printf("path: %s; locked: %v\n", fileLock.Path(), fileLock.Locked())
}
func ExampleFlock_TryLockContext() {
// should probably put these in /var/lock
fileLock := flock.New(os.TempDir() + "/go-lock.lock")
lockCtx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
defer cancel()
locked, err := fileLock.TryLockContext(lockCtx, 678*time.Millisecond)
if err != nil {
// handle locking error
}
if locked {
fmt.Printf("path: %s; locked: %v\n", fileLock.Path(), fileLock.Locked())
if err := fileLock.Unlock(); err != nil {
// handle unlock error
}
}
fmt.Printf("path: %s; locked: %v\n", fileLock.Path(), fileLock.Locked())
}
|
