36 lines
807 B
Go
36 lines
807 B
Go
package hw05_parallel_execution //nolint:golint,stylecheck
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import (
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"errors"
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"log"
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"sync"
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)
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var ErrErrorsLimitExceeded = errors.New("errors limit exceeded")
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type Task func() error
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// Run starts tasks in N goroutines and stops its work when receiving M errors from tasks
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func Run(tasks []Task, N int, M int) error {
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log.Println("Tasks:", len(tasks), "| Goroutines:", N, "| Errors:", M)
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errs := 0
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for i := 0; i < len(tasks); i = i + N {
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wg := sync.WaitGroup{}
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for g := 1; g <= N && i+g < len(tasks); g++ {
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wg.Add(1)
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go func(rt Task, i int, g int, errs *int) {
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if err := rt; err != nil {
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*errs++
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}
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wg.Done()
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}(tasks[i+g], i, g, &errs)
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}
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wg.Wait()
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if errs > M {
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log.Println("Produced", errs, "errors of", M)
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return ErrErrorsLimitExceeded
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}
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}
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return nil
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}
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