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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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