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// 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.
// Pass numbers along a chain of threads.
package main
import (
"runtime";
"stdio";
"strconv";
)
const N = 10
const R = 5
func link(left chan<- int, right <-chan int) {
// Keep the links in dedicated operating system
// threads, so that this program tests coordination
// between pthreads and not just goroutines.
runtime.LockOSThread();
for {
v := <-right;
stdio.Puts(strconv.Itoa(v));
left <- 1+v;
}
}
func main() {
leftmost := make(chan int);
var left chan int;
right := leftmost;
for i := 0; i < N; i++ {
left, right = right, make(chan int);
go link(left, right);
}
for i := 0; i < R; i++ {
right <- 0;
x := <-leftmost;
stdio.Puts(strconv.Itoa(x));
}
}
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