+++ /dev/null
-/* Copyright (c) 2012-2023. The SimGrid Team. All rights reserved. */
-
-/* This program is free software; you can redistribute it and/or modify it
- * under the terms of the license (GNU LGPL) which comes with this package. */
-
-package app.centralizedmutex;
-import java.util.LinkedList;
-
-import org.simgrid.msg.Msg;
-import org.simgrid.msg.Host;
-import org.simgrid.msg.Task;
-import org.simgrid.msg.Process;
-import org.simgrid.msg.MsgException;
-
-public class Coordinator extends Process {
- public Coordinator(Host host, String name, String[]args) {
- super(host,name,args);
- }
-
- public void main(String[] args) throws MsgException {
- int csToServe = Integer.parseInt(args[0]);
- LinkedList<RequestTask> waitingQueue=new LinkedList<>();
-
- while (csToServe >0) {
- Task task = Task.receive("coordinator");
- if (task instanceof RequestTask) {
- RequestTask t = (RequestTask) task;
- if (waitingQueue.isEmpty()) {
- Msg.info("Got a request from "+t.from+". Queue empty: grant it");
- GrantTask tosend = new GrantTask();
- tosend.send(t.from);
- } else {
- waitingQueue.addFirst(t);
- }
- } else if (task instanceof ReleaseTask) {
- if (!waitingQueue.isEmpty()) {
- RequestTask req = waitingQueue.removeLast();
- GrantTask tosend = new GrantTask();
- tosend.send(req.from);
- }
- csToServe--;
- if (waitingQueue.isEmpty() && csToServe==0) {
- Msg.info("we should shutdown the simulation now");
- }
- }
- }
- }
-}