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c6611b2f7e
Updates #30228 Change-Id: I4d213c6fe68c47ccb877f13b55128e035f76a26b Reviewed-on: https://go-review.googlesource.com/c/163421 Run-TryBot: Bryan C. Mills <bcmills@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Ian Lance Taylor <iant@golang.org>
49 lines
938 B
Go
49 lines
938 B
Go
// run -tags=use_go_run
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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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"cgostdio/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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