mirror of
https://github.com/golang/go
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48 lines
925 B
Go
48 lines
925 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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// Compute Fibonacci numbers with two goroutines
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// that pass integers back and forth. No actual
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// concurrency, just threads and synchronization
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// and foreign code on multiple pthreads.
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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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func fibber(c, out chan int64, i int64) {
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// Keep the fibbers 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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if i == 0 {
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c <- i;
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}
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for {
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j := <-c;
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stdio.Puts(strconv.Itoa64(j));
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out <- j;
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<-out;
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i += j;
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c <- i;
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}
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}
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func main() {
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c := make(chan int64);
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out := make(chan int64);
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go fibber(c, out, 0);
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go fibber(c, out, 1);
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<-out;
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for i := 0; i < 90; i++ {
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out <- 1;
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<-out;
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}
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}
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