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pkg/util/async/runner.go
58 строк
1 KB
Harry Zhang
Rename runnter pkg name
29 июл 2016, 09:37
29 июл 2016, 09:37
e0ab760
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/* Copyright 2014 The Kubernetes Authors. 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 async import ( "sync" ) // Runner is an abstraction to make it easy to start and stop groups of things that can be // described by a single function which waits on a channel close to exit. type Runner struct { lock sync.Mutex loopFuncs []func(stop chan struct{}) stop *chan struct{} } // NewRunner makes a runner for the given function(s). The function(s) should loop until // the channel is closed. func NewRunner(f ...func(stop chan struct{})) *Runner { return &Runner{loopFuncs: f} } // Start begins running. func (r *Runner) Start() { r.lock.Lock() defer r.lock.Unlock() if r.stop == nil { c := make(chan struct{}) r.stop = &c for i := range r.loopFuncs { go r.loopFuncs[i](*r.stop) } } } // Stop stops running. func (r *Runner) Stop() { r.lock.Lock() defer r.lock.Unlock() if r.stop != nil { close(*r.stop) r.stop = nil } }