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https://github.com/golang/go
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56 lines
879 B
Go
56 lines
879 B
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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// Test communication with multiple simultaneous goroutines.
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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 r(c chan int, m int) {
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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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println("r",
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"m=", m,
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"r=", r,
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"h=", h[r])
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panic("fail")
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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 s(c chan int) {
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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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println("s")
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panic("fail")
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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 main() {
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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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