Commit 850bc96

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groutine原理

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Original file line number	Diff line number	Diff line change
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	`1`	`+package main`
	`2`	`+`
	`3`	`+import (`
	`4`	`+ "context"`
	`5`	`+ "fmt"`
	`6`	`+ "time"`
	`7`	`+)`
	`8`	`+`
	`9`	`+func main() {`
	`10`	`+ ctx, cancel := context.WithTimeout(context.Background(), 1*time.Second)`
	`11`	`+ defer cancel()`
	`12`	`+`
	`13`	`+ go handle(ctx, 500*time.Millisecond)`
	`14`	`+ select {`
	`15`	`+ case <-ctx.Done():`
	`16`	`+ fmt.Println("main", ctx.Err())`
	`17`	`+ }`
	`18`	`+}`
	`19`	`+`
	`20`	`+func handle(ctx context.Context, duration time.Duration) {`
	`21`	`+ select {`
	`22`	`+ case <-ctx.Done():`
	`23`	`+ fmt.Println("handle", ctx.Err())`
	`24`	`+ case <-time.After(duration):`
	`25`	`+ fmt.Println("process request with", duration)`
	`26`	`+ }`
	`27`	`+}`

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