| package threadsafe |
| |
| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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. |
| */ |
| |
| import ( |
| "sync" |
| |
| "github.com/apache/trafficcontrol/traffic_monitor/dsdata" |
| ) |
| |
| // DSStats wraps a deliveryservice.Stats object to be safe for multiple reader goroutines and a single writer. |
| type DSStats struct { |
| dsStats *dsdata.Stats |
| m *sync.RWMutex |
| } |
| |
| // DSStatsReader permits reading of a dsdata.Stats object, but not writing. This is designed so a Stats object can safely be passed to multiple goroutines, without worry one may unsafely write. |
| type DSStatsReader interface { |
| Get() dsdata.StatsReadonly |
| } |
| |
| // NewDSStats returns a deliveryservice.Stats object wrapped to be safe for multiple readers and a single writer. |
| func NewDSStats() DSStats { |
| return DSStats{m: &sync.RWMutex{}, dsStats: dsdata.NewStats(0)} |
| } |
| |
| // Get returns a Stats object safe for reading by multiple goroutines |
| func (o *DSStats) Get() dsdata.StatsReadonly { |
| o.m.RLock() |
| defer o.m.RUnlock() |
| return *o.dsStats |
| } |
| |
| // Set sets the internal Stats object. This MUST NOT be called by multiple goroutines. |
| func (o *DSStats) Set(newDsStats dsdata.Stats) { |
| o.m.Lock() |
| *o.dsStats = newDsStats |
| o.m.Unlock() |
| } |