mirror of
https://github.com/astaxie/beego.git
synced 2024-07-04 23:25:10 +00:00
37 lines
755 B
Go
37 lines
755 B
Go
|
// Copyright 2013 The LevelDB-Go Authors. All rights reserved.
|
||
|
|
// Use of this source code is governed by a BSD-style
|
||
|
|
// license that can be found in the LICENSE file.
|
||
|
|
|
||
|
|
package filelock
|
||
|
|
|
||
|
|
import (
|
||
|
|
"io"
|
||
|
|
"syscall"
|
||
|
|
)
|
||
|
|
|
||
|
|
// lockCloser hides all of an syscall.Handle's methods, except for Close.
|
||
|
|
type lockCloser struct {
|
||
|
|
fd syscall.Handle
|
||
|
|
}
|
||
|
|
|
||
|
|
func (l lockCloser) Close() error {
|
||
|
|
return syscall.Close(l.fd)
|
||
|
|
}
|
||
|
|
|
||
|
|
func Lock(name string) (io.Closer, error) {
|
||
|
|
p, err := syscall.UTF16PtrFromString(name)
|
||
|
|
if err != nil {
|
||
|
|
return nil, err
|
||
|
|
}
|
||
|
|
fd, err := syscall.CreateFile(p,
|
||
|
|
syscall.GENERIC_READ|syscall.GENERIC_WRITE,
|
||
|
|
0, nil, syscall.CREATE_ALWAYS,
|
||
|
|
syscall.FILE_ATTRIBUTE_NORMAL,
|
||
|
|
0,
|
||
|
|
)
|
||
|
|
if err != nil {
|
||
|
|
return nil, err
|
||
|
|
}
|
||
|
|
return lockCloser{fd: fd}, nil
|
||
|
|
}
|