mirror of
https://github.com/arangodb/kube-arangodb.git
synced 2024-12-14 11:57:37 +00:00
70 lines
1.4 KiB
Go
70 lines
1.4 KiB
Go
//
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// DISCLAIMER
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//
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// Copyright 2016-2022 ArangoDB GmbH, Cologne, Germany
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// 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
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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// Copyright holder is ArangoDB GmbH, Cologne, Germany
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//
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package util
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import "sync"
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// RunParallel runs actions parallelly throttling them to the given maximum number.
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func RunParallel(max int, actions ...func() error) error {
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c, close := ParallelThread(max)
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defer close()
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errors := make([]error, len(actions))
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var wg sync.WaitGroup
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wg.Add(len(actions))
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for id, i := range actions {
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go func(id int, action func() error) {
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defer func() {
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c <- struct{}{}
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wg.Done()
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}()
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<-c
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errors[id] = action()
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}(id, i)
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}
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wg.Wait()
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for _, err := range errors {
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if err != nil {
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return err
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}
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}
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return nil
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}
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func ParallelThread(max int) (chan struct{}, func()) {
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c := make(chan struct{}, max)
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for i := 0; i < max; i++ {
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c <- struct{}{}
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}
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return c, func() {
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close(c)
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for range c {
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}
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}
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}
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