github.com/HACKERALERT/Picocrypt/src/external/sys@v0.0.0-20210609020157-e519952f829f/unix/example_flock_test.go (about)

     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  
     8  package unix_test
     9  
    10  import (
    11  	"log"
    12  	"os"
    13  
    14  	"golang.org/x/sys/unix"
    15  )
    16  
    17  func 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  }