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chain.go
// 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. //go: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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