mirror of
https://github.com/golang/go
synced 2024-11-18 04:14:49 -07:00
44 lines
855 B
Go
44 lines
855 B
Go
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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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// Pass numbers along a chain of threads.
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package main
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import (
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"runtime";
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"stdio";
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"strconv";
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)
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const N = 10
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const R = 5
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func link(left chan<- int, right <-chan int) {
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// Keep the links in dedicated operating system
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// threads, so that this program tests coordination
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// between pthreads and not just goroutines.
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runtime.LockOSThread();
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for {
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v := <-right;
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stdio.Puts(strconv.Itoa(v));
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left <- 1+v;
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}
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}
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func main() {
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leftmost := make(chan int);
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var left chan int;
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right := leftmost;
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for i := 0; i < N; i++ {
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left, right = right, make(chan int);
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go link(left, right);
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}
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for i := 0; i < R; i++ {
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right <- 0;
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x := <-leftmost;
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stdio.Puts(strconv.Itoa(x));
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}
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}
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