forked from TrueCloudLab/restic
35 lines
843 B
Go
35 lines
843 B
Go
package repository
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import (
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"context"
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"golang.org/x/sync/errgroup"
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)
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// RunWorkers runs count instances of workerFunc using an errgroup.Group.
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// After all workers have terminated, finalFunc is run. If an error occurs in
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// one of the workers, it is returned. FinalFunc is always run, regardless of
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// any other previous errors.
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func RunWorkers(ctx context.Context, count int, workerFunc, finalFunc func() error) error {
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wg, ctx := errgroup.WithContext(ctx)
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// run workers
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for i := 0; i < count; i++ {
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wg.Go(workerFunc)
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}
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// wait for termination
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err := wg.Wait()
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// make sure finalFunc is run
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finalErr := finalFunc()
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// if the workers returned an error, return it to the caller (disregarding
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// any error from finalFunc)
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if err != nil {
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return err
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}
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// if not, return the value finalFunc returned
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return finalErr
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}
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