go/doc/progs/server1.go
Rob Pike f7a506bf42 tutorial code:
tweak a program or two
delete unused programs
add shell script to run them all

R=gri
DELTA=213  (62 added, 147 deleted, 4 changed)
OCL=15435
CL=15437
2008-09-17 12:14:52 -07:00

55 lines
1.1 KiB
Go

// 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
type Request struct {
a, b int;
replyc *chan int;
}
type BinOp (a, b int) int;
func Run(op *BinOp, request *Request) {
result := op(request.a, request.b);
request.replyc <- result;
}
func Server(op *BinOp, service *chan *Request, quit *chan bool) {
for {
select {
case request := <-service:
go Run(op, request); // don't wait for it
case <-quit:
return;
}
}
}
func StartServer(op *BinOp) (service *chan *Request, quit *chan bool) {
service = new(chan *Request);
quit = new(chan bool);
go Server(op, service, quit);
return service, quit;
}
func main() {
adder, quit := 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 = new(chan int);
adder <- req;
}
for i := N-1; i >= 0; i-- { // doesn't matter what order
if <-reqs[i].replyc != N + 2*i {
print("fail at ", i, "\n");
}
}
quit <- true;
}