mirror of
https://github.com/golang/go
synced 2024-11-22 12:34:48 -07:00
57 lines
809 B
Go
57 lines
809 B
Go
// $G $D/$F.go && $L $F.$A && ./$A.out
|
|
|
|
// 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.
|
|
|
|
package main
|
|
|
|
const N = 1000; // sent messages
|
|
const M = 10; // receiving goroutines
|
|
const W = 2; // channel buffering
|
|
var h [N]int; // marking of send/recv
|
|
|
|
func
|
|
r(c chan int, m int)
|
|
{
|
|
for {
|
|
select {
|
|
case r := <- c:
|
|
if h[r] != 1 {
|
|
panicln("r",
|
|
"m=", m,
|
|
"r=", r,
|
|
"h=", h[r]
|
|
);
|
|
}
|
|
h[r] = 2;
|
|
}
|
|
}
|
|
}
|
|
|
|
func
|
|
s(c chan int)
|
|
{
|
|
for n:=0; n<N; n++ {
|
|
r := n;
|
|
if h[r] != 0 {
|
|
panicln("s");
|
|
}
|
|
h[r] = 1;
|
|
c <- r;
|
|
}
|
|
}
|
|
|
|
func
|
|
main()
|
|
{
|
|
c := make(chan int, W);
|
|
for m:=0; m<M; m++ {
|
|
go r(c, m);
|
|
sys.Gosched();
|
|
}
|
|
sys.Gosched();
|
|
sys.Gosched();
|
|
s(c);
|
|
}
|