summaryrefslogtreecommitdiffstats
path: root/test/ken/chan1.go
diff options
context:
space:
mode:
Diffstat (limited to '')
-rw-r--r--test/ken/chan1.go55
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)
+}