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https://github.com/golang/go
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42 lines
742 B
Go
42 lines
742 B
Go
// $G $D/$F.go && $L $F.$A && ./$A.out
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// Copyright 2009 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// make a lot of goroutines, threaded together.
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// tear them down cleanly.
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package main
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import (
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"os"
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"strconv"
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)
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func f(left, right chan int) {
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left <- <-right
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}
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func main() {
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var n = 10000
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if len(os.Args) > 1 {
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var err error
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n, err = strconv.Atoi(os.Args[1])
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if err != nil {
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print("bad arg\n")
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os.Exit(1)
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}
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}
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leftmost := make(chan int)
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right := leftmost
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left := leftmost
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for i := 0; i < n; i++ {
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right = make(chan int)
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go f(left, right)
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left = right
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}
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go func(c chan int) { c <- 1 }(right)
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<-leftmost
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}
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