1 files changed, 55 insertions, 0 deletions
diff --git a/test/ken/chan1.go b/test/ken/chan1.go
new file mode 100644
index 0000000..cbd21a3
--- /dev/null
+++ b/test/ken/chan1.go
@@ -0,0 +1,55 @@
+// run
+
+// 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.
+
+// Test communication with multiple simultaneous goroutines.
+
+package main
+
+import "runtime"
+
+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 {
+				println("r",
+					"m=", m,
+					"r=", r,
+					"h=", h[r])
+				panic("fail")
+			}
+			h[r] = 2
+		}
+	}
+}
+
+func s(c chan int) {
+	for n := 0; n < N; n++ {
+		r := n
+		if h[r] != 0 {
+			println("s")
+			panic("fail")
+		}
+		h[r] = 1
+		c <- r
+	}
+}
+
+func main() {
+	c := make(chan int, W)
+	for m := 0; m < M; m++ {
+		go r(c, m)
+		runtime.Gosched()
+	}
+	runtime.Gosched()
+	runtime.Gosched()
+	s(c)
+}