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// 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
import "fmt"
type request struct {
a, b int
replyc chan int
}
type binOp func(a, b int) int
func run(op binOp, req *request) {
reply := op(req.a, req.b)
req.replyc <- reply
}
func server(op binOp, service chan *request) {
for {
req := <-service
go run(op, req) // don't wait for it
}
}
func startServer(op binOp) chan *request {
req := make(chan *request)
go server(op, req)
return req
}
func main() {
adder := startServer(func(a, b int) int { return a + b })
const N = 100
var reqs [N]request
for i := 0; i < N; i++ {
req := &reqs[i]
req.a = i
req.b = i + N
req.replyc = make(chan int)
adder <- req
}
for i := N-1; i >= 0; i-- { // doesn't matter what order
if <-reqs[i].replyc != N + 2*i {
fmt.Println("fail at", i)
}
}
fmt.Println("done")
}
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