locker

Locker

This is the stable version.

Description

• FileMutex - To lock via operating system file
  • Supports functions:
    • Lock
    • TryLock
    • Unlock
  • Important:
    • thread safe - You cannot take several locks from one mutex within a single running application.

Supports platforms

• unix (linux, mac)
• windows
• other

Installation

$ go get github.com/mantyr/locker

Example

Note

You will probably be protecting the entire application, rather than a single object.

type Storage struct {
	mutex locker.Mutex
}

func New(fileLock string) (*Storage, error) {
	mutex, err := locker.NewFileMutex(fileLock)
	if err != nil {
		return nil, err
	}
	return &Storage{
		mutex: mutex,
	}, nil
}

func (s *Storage) Action() (err error) {
	defer s.mutex.Unlock()
	err = s.mutex.Lock()
	if err != nil {
		return err
	}
	fmt.Println("action")
	return nil
}

go run ./example/main.go lock ./testdata/file.lock
go run ./example/main.go try-lock ./testdata/file.lock
go run ./example/main.go multi-lock ./testdata/file.lock
go run ./example/main.go unlock ./testdata/file.lock

Author

Oleg Shevelev