mirror of
https://github.com/etcd-io/etcd.git
synced 2024-09-27 06:25:44 +00:00
59 lines
1.2 KiB
Go
59 lines
1.2 KiB
Go
// Copyright 2015 CoreOS, Inc.
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
package storage
|
|
|
|
import (
|
|
"sync"
|
|
|
|
"github.com/coreos/etcd/storage/storagepb"
|
|
)
|
|
|
|
type watcher struct {
|
|
key []byte
|
|
prefix bool
|
|
cur int64
|
|
|
|
ch chan storagepb.Event
|
|
mu sync.Mutex
|
|
err error
|
|
}
|
|
|
|
func newWatcher(key []byte, prefix bool, start int64) *watcher {
|
|
return &watcher{
|
|
key: key,
|
|
prefix: prefix,
|
|
cur: start,
|
|
ch: make(chan storagepb.Event, 10),
|
|
}
|
|
}
|
|
|
|
func (w *watcher) Event() <-chan storagepb.Event { return w.ch }
|
|
|
|
func (w *watcher) Err() error {
|
|
w.mu.Lock()
|
|
defer w.mu.Unlock()
|
|
return w.err
|
|
}
|
|
|
|
func (w *watcher) stopWithError(err error) {
|
|
if w.err != nil {
|
|
return
|
|
}
|
|
close(w.ch)
|
|
w.mu.Lock()
|
|
w.err = err
|
|
w.mu.Unlock()
|
|
}
|