mirror of
https://github.com/golang/go
synced 2024-11-19 02:34:44 -07:00
325cf8ef21
in the tests, println+panic. gofmt some tests too. R=rsc CC=golang-dev https://golang.org/cl/741041
57 lines
921 B
Go
57 lines
921 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
|
|
|
|
var counter uint
|
|
var shift uint
|
|
|
|
func GetValue() uint {
|
|
counter++
|
|
return 1 << shift
|
|
}
|
|
|
|
func Send(a, b chan uint) int {
|
|
var i int
|
|
|
|
LOOP:
|
|
for {
|
|
select {
|
|
case a <- GetValue():
|
|
i++
|
|
a = nil
|
|
case b <- GetValue():
|
|
i++
|
|
b = nil
|
|
default:
|
|
break LOOP
|
|
}
|
|
shift++
|
|
}
|
|
return i
|
|
}
|
|
|
|
func main() {
|
|
a := make(chan uint, 1)
|
|
b := make(chan uint, 1)
|
|
if v := Send(a, b); v != 2 {
|
|
println("Send returned", v, "!= 2")
|
|
panic("fail")
|
|
}
|
|
if av, bv := <-a, <-b; av|bv != 3 {
|
|
println("bad values", av, bv)
|
|
panic("fail")
|
|
}
|
|
if v := Send(a, nil); v != 1 {
|
|
println("Send returned", v, "!= 1")
|
|
panic("fail")
|
|
}
|
|
if counter != 10 {
|
|
println("counter is", counter, "!= 10")
|
|
panic("fail")
|
|
}
|
|
}
|