mirror of
https://gitee.com/milvus-io/milvus.git
synced 2024-12-05 05:18:52 +08:00
88 lines
1.8 KiB
Go
88 lines
1.8 KiB
Go
// Copyright (C) 2019-2020 Zilliz. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance
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// with the License. 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 distributed under the License
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// is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
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// or implied. See the License for the specific language governing permissions and limitations under the License.
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package querynode
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import (
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"sync"
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)
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type tSafeWatcher struct {
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notifyChan chan bool
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}
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func newTSafeWatcher() *tSafeWatcher {
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return &tSafeWatcher{
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notifyChan: make(chan bool, 1),
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}
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}
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func (watcher *tSafeWatcher) notify() {
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if len(watcher.notifyChan) == 0 {
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watcher.notifyChan <- true
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}
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}
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func (watcher *tSafeWatcher) hasUpdate() {
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<-watcher.notifyChan
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}
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type tSafer interface {
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get() Timestamp
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set(t Timestamp)
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registerTSafeWatcher(t *tSafeWatcher)
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close()
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}
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type tSafe struct {
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tSafeMu sync.Mutex // guards all fields
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tSafe Timestamp
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watcherList []*tSafeWatcher
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}
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func newTSafe() tSafer {
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var t tSafer = &tSafe{
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watcherList: make([]*tSafeWatcher, 0),
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}
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return t
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}
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func (ts *tSafe) registerTSafeWatcher(t *tSafeWatcher) {
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ts.tSafeMu.Lock()
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defer ts.tSafeMu.Unlock()
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ts.watcherList = append(ts.watcherList, t)
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}
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func (ts *tSafe) get() Timestamp {
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ts.tSafeMu.Lock()
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defer ts.tSafeMu.Unlock()
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return ts.tSafe
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}
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func (ts *tSafe) set(t Timestamp) {
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ts.tSafeMu.Lock()
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defer ts.tSafeMu.Unlock()
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ts.tSafe = t
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for _, watcher := range ts.watcherList {
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watcher.notify()
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}
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}
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func (ts *tSafe) close() {
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ts.tSafeMu.Lock()
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defer ts.tSafeMu.Unlock()
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for _, watcher := range ts.watcherList {
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close(watcher.notifyChan)
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}
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}
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