42 lines
926 B
Go
42 lines
926 B
Go
// Copyright 2013 The LevelDB-Go and Pebble Authors. All rights reserved. Use
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// of this source code is governed by a BSD-style license that can be found in
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// the LICENSE file.
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//go:build windows
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// +build windows
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package vfs
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import (
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"io"
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"syscall"
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)
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// lockCloser hides all of an syscall.Handle's methods, except for Close.
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type lockCloser struct {
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fd syscall.Handle
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}
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func (l lockCloser) Close() error {
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return syscall.Close(l.fd)
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}
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// Lock locks the given file. On Windows, Locking will fail if the file is
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// already open by the current process.
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func (defaultFS) Lock(name string) (io.Closer, error) {
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p, err := syscall.UTF16PtrFromString(name)
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if err != nil {
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return nil, err
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}
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fd, err := syscall.CreateFile(p,
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syscall.GENERIC_READ|syscall.GENERIC_WRITE,
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0, nil, syscall.CREATE_ALWAYS,
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syscall.FILE_ATTRIBUTE_NORMAL,
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0,
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)
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if err != nil {
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return nil, err
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}
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return lockCloser{fd: fd}, nil
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}
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