mirror of
https://github.com/golang/go
synced 2024-11-26 09:18:07 -07:00
59 lines
839 B
Go
59 lines
839 B
Go
// $G $D/$F.go && $L $F.$A && ./$A.out
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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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package main
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import "runtime"
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const N = 1000; // sent messages
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const M = 10; // receiving goroutines
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const W = 2; // channel buffering
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var h [N]int; // marking of send/recv
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func
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r(c chan int, m int)
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{
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for {
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select {
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case r := <- c:
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if h[r] != 1 {
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panicln("r",
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"m=", m,
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"r=", r,
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"h=", h[r]
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);
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}
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h[r] = 2;
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}
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}
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}
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func
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s(c chan int)
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{
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for n:=0; n<N; n++ {
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r := n;
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if h[r] != 0 {
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panicln("s");
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}
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h[r] = 1;
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c <- r;
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}
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}
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func
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main()
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{
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c := make(chan int, W);
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for m:=0; m<M; m++ {
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go r(c, m);
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runtime.Gosched();
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}
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runtime.Gosched();
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runtime.Gosched();
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s(c);
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}
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