1// Copyright 2018 The Go Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style
3// license that can be found in the LICENSE file.
4
5//go:build darwin || dragonfly || freebsd || linux || netbsd || openbsd || solaris
6// +build darwin dragonfly freebsd linux netbsd openbsd solaris
7
8package unix_test
9
10import (
11	"log"
12	"os"
13
14	"golang.org/x/sys/unix"
15)
16
17func ExampleFlock() {
18	f, _ := os.Create("example.lock")
19	if err := unix.Flock(int(f.Fd()), unix.LOCK_EX); err != nil {
20		log.Fatal(err)
21	}
22	// Do work here that requires the lock. When finished, release the lock:
23	if err := unix.Flock(int(f.Fd()), unix.LOCK_UN); err != nil {
24		log.Fatal(err)
25	}
26}
27