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- // 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")
- }
- }
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