golang chain 代码
文件路径：/misc/cgo/stdio/testdata/chain.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
/ Pass numbers along a chain of threads.
package main
import (
"runtime"
"strconv"
"cgostdio/stdio"
)
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.Stdout.WriteString(strconv.Itoa(v) + "\n")
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.Stdout.WriteString(strconv.Itoa(x) + "\n")
}
}