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// $G $D/$F.go && $L $F.$A && ./$A.out
// Copyright 2009 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// make a lot of goroutines, threaded together.
// tear them down cleanly.
package main
import (
"strings";
)
func f(left, right *chan int) {
left <- <-right;
}
func main() {
var n = 10000;
if sys.argc() > 1 {
var ok bool;
n, ok = strings.atoi(sys.argv(1));
if !ok {
print("bad arg\n");
sys.exit(1);
}
}
leftmost := new(chan int);
right := leftmost;
left := leftmost;
for i := 0; i < n; i++ {
right = new(chan int);
go f(left, right);
left = right;
}
go func(c *chan int) { c <- 1 }(right);
<-leftmost;
}
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