golang fib 代码
文件路径：/misc/cgo/stdio/testdata/fib.go
/ run -tags=use_go_run
/ 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.
/ +build test_run
/ 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"
"strconv"
"cgostdio/stdio"
)
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.Stdout.WriteString(strconv.FormatInt(j, 10) + "\n")
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
}
}