44 lines
833 B
Go
44 lines
833 B
Go
// Copyright 2014 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.
|
|
|
|
// +build solaris
|
|
|
|
package filelock
|
|
|
|
import (
|
|
"io"
|
|
"os"
|
|
"syscall"
|
|
)
|
|
|
|
// lockCloser hides all of an os.File's methods, except for Close.
|
|
type lockCloser struct {
|
|
f *os.File
|
|
}
|
|
|
|
func (l lockCloser) Close() error {
|
|
return l.f.Close()
|
|
}
|
|
|
|
func Lock(name string) (io.Closer, error) {
|
|
f, err := os.Create(name)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
spec := syscall.Flock_t{
|
|
Type: syscall.F_WRLCK,
|
|
Whence: int16(os.SEEK_SET),
|
|
Start: 0,
|
|
Len: 0, // 0 means to lock the entire file.
|
|
Pid: int32(os.Getpid()),
|
|
}
|
|
if err := syscall.FcntlFlock(f.Fd(), syscall.F_SETLK, &spec); err != nil {
|
|
f.Close()
|
|
return nil, err
|
|
}
|
|
|
|
return lockCloser{f}, nil
|
|
}
|