go-flock File-lock

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• Based on the syscall.FcntlFlock and syscall.Flock to achieve global file locks and local file locks.
• Only the method of the UNIX system is implemented, Window is temporarily unavailable. If you are interested, you can submit the relevant method

Instructions

• Introduce

go get github.com/guojia99/go-flock

• Interface

type LockFile interface {
	File() *os.File
	Lock() error
	RLock() error
	TryLock() bool
	TryRLock() bool
	Unlock() error
}

• Use global file lock

package main

import (
	"github.com/guojia99/flock"
)

func main(){
    fl := flock.OpenLockFile("file.file")
    fl.Lock()
    defer fl.Unlock()
    fl.File().Write([]byte{1, 2, 3})
}

• Use the file local lock, of which 0, 1000 means that the lock is valid for the 0 to 1000 bytes

package main

import (
	"github.com/guojia99/flock"
)

func main(){
    fl := flock.OpenBlockLockFile("file.file", 0, 1000)
    fl.Lock()
    defer fl.Unlock()
	fl.File().WriteAt([]byte{1, 2, 3}, 0)
    
    fl2 := flock.OpenBlockLockFile("file.file", 1000, 2000)
    fl2.Lock()
    defer fl2.Unlock()
    fl.File().WriteAt([]byte{1, 2, 3}, 1000)
}

License

Go-Flock is based on the Apache 2.0 license and checksLICENSEto get more information.