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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.
// Compute Fibonacci numbers with two goroutines
// that pass integers back and forth. No actual
// concurrency, just threads and synchronization
// and foreign code on multiple pthreads.
package main
import (
"runtime";
"stdio";
"strconv";
)
func fibber(c, out chan int64, i int64) {
// Keep the fibbers in dedicated operating system
// threads, so that this program tests coordination
// between pthreads and not just goroutines.
runtime.LockOSThread();
if i == 0 {
c <- i;
}
for {
j := <-c;
stdio.Puts(strconv.Itoa64(j));
out <- j;
<-out;
i += j;
c <- i;
}
}
func main() {
c := make(chan int64);
out := make(chan int64);
go fibber(c, out, 0);
go fibber(c, out, 1);
<-out;
for i := 0; i < 90; i++ {
out <- 1;
<-out;
}
}
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