mirror of
https://github.com/ceph/ceph-csi.git
synced 2024-12-05 04:30:23 +00:00
64 lines
1.4 KiB
Go
64 lines
1.4 KiB
Go
|
/*
|
||
|
Copyright 2016 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 workqueue
|
||
|
|
||
|
import (
|
||
|
"context"
|
||
|
"sync"
|
||
|
|
||
|
utilruntime "k8s.io/apimachinery/pkg/util/runtime"
|
||
|
)
|
||
|
|
||
|
type DoWorkPieceFunc func(piece int)
|
||
|
|
||
|
// ParallelizeUntil is a framework that allows for parallelizing N
|
||
|
// independent pieces of work until done or the context is canceled.
|
||
|
func ParallelizeUntil(ctx context.Context, workers, pieces int, doWorkPiece DoWorkPieceFunc) {
|
||
|
var stop <-chan struct{}
|
||
|
if ctx != nil {
|
||
|
stop = ctx.Done()
|
||
|
}
|
||
|
|
||
|
toProcess := make(chan int, pieces)
|
||
|
for i := 0; i < pieces; i++ {
|
||
|
toProcess <- i
|
||
|
}
|
||
|
close(toProcess)
|
||
|
|
||
|
if pieces < workers {
|
||
|
workers = pieces
|
||
|
}
|
||
|
|
||
|
wg := sync.WaitGroup{}
|
||
|
wg.Add(workers)
|
||
|
for i := 0; i < workers; i++ {
|
||
|
go func() {
|
||
|
defer utilruntime.HandleCrash()
|
||
|
defer wg.Done()
|
||
|
for piece := range toProcess {
|
||
|
select {
|
||
|
case <-stop:
|
||
|
return
|
||
|
default:
|
||
|
doWorkPiece(piece)
|
||
|
}
|
||
|
}
|
||
|
}()
|
||
|
}
|
||
|
wg.Wait()
|
||
|
}
|