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05390a0793
The build tags are necessary to keep "go build" in that directory building only stdio.go, but we have to arrange for test/run.go to treat them as satisfied. Fixes #12625. Change-Id: Iec0cb2fdc2c9b24a4e0530be25e940aa0cc9552e Reviewed-on: https://go-review.googlesource.com/17454 Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org> Reviewed-by: Ian Lance Taylor <iant@golang.org>
49 lines
919 B
Go
49 lines
919 B
Go
// cmpout
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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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// +build test_run
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// Pass numbers along a chain of threads.
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package main
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import (
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"runtime"
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"strconv"
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"../stdio"
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)
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const N = 10
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const R = 5
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func link(left chan<- int, right <-chan int) {
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// Keep the links 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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for {
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v := <-right
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stdio.Stdout.WriteString(strconv.Itoa(v) + "\n")
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left <- 1 + v
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}
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}
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func main() {
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leftmost := make(chan int)
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var left chan int
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right := leftmost
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for i := 0; i < N; i++ {
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left, right = right, make(chan int)
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go link(left, right)
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}
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for i := 0; i < R; i++ {
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right <- 0
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x := <-leftmost
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stdio.Stdout.WriteString(strconv.Itoa(x) + "\n")
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}
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}
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