f1ed69e883
Build tags are not compatible with block comments. Also adds copyright header to a few places it was missing.
72 lines
1.4 KiB
Go
72 lines
1.4 KiB
Go
// Copyright 2015 CoreOS, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// +build windows
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package fileutil
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import (
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"errors"
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"os"
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)
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var (
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ErrLocked = errors.New("file already locked")
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)
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type Lock interface {
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Name() string
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TryLock() error
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Lock() error
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Unlock() error
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Destroy() error
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}
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type lock struct {
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fd int
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file *os.File
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}
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func (l *lock) Name() string {
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return l.file.Name()
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}
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// TryLock acquires exclusivity on the lock without blocking
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func (l *lock) TryLock() error {
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return nil
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}
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// Lock acquires exclusivity on the lock without blocking
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func (l *lock) Lock() error {
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return nil
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}
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// Unlock unlocks the lock
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func (l *lock) Unlock() error {
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return nil
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}
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func (l *lock) Destroy() error {
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return l.file.Close()
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}
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func NewLock(file string) (Lock, error) {
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f, err := os.Open(file)
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if err != nil {
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return nil, err
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}
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l := &lock{int(f.Fd()), f}
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return l, nil
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}
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