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moby--moby/vendor/github.com/gofrs/flock/README.md

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# flock
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`flock` implements a thread-safe sync.Locker interface for file locking. It also
includes a non-blocking TryLock() function to allow locking without blocking execution.
## License
`flock` is released under the BSD 3-Clause License. See the `LICENSE` file for more details.
## Go Compatibility
This package makes use of the `context` package that was introduced in Go 1.7. As such, this
package has an implicit dependency on Go 1.7+.
## Installation
```
go get -u github.com/gofrs/flock
```
## Usage
```Go
import "github.com/gofrs/flock"
fileLock := flock.New("/var/lock/go-lock.lock")
locked, err := fileLock.TryLock()
if err != nil {
// handle locking error
}
if locked {
// do work
fileLock.Unlock()
}
```
For more detailed usage information take a look at the package API docs on
[GoDoc](https://godoc.org/github.com/gofrs/flock).