30 lines
458 B
Go
30 lines
458 B
Go
package main
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import (
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"fmt"
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"sync"
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"time"
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)
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func worker(id int, wg *sync.WaitGroup) {
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defer wg.Done()
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fmt.Printf("worker-%d 开始工作\n", id)
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time.Sleep(time.Duration(id) * 300 * time.Millisecond)
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fmt.Printf("worker-%d 完成\n", id)
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}
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func main() {
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var wg sync.WaitGroup
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n := 3
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wg.Add(n)
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for i := 1; i <= n; i++ {
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go worker(i, &wg)
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}
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fmt.Println("main: 等待所有 worker 完成...")
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wg.Wait()
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fmt.Println("main: 全部完成")
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}
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