+++ /dev/null
-/* Copyright (c) 2012-2021. 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. */
-
-/***************************** Bugged2 ****************************************/
-/* This example implements a centralized mutual exclusion algorithm. */
-/* One client stay always in critical section */
-/* LTL property checked : !(GFcs) */
-/******************************************************************************/
-
-#include <simgrid/modelchecker.h>
-#include <simgrid/msg.h>
-
-XBT_LOG_NEW_DEFAULT_CATEGORY(bugged3, "my log messages");
-
-int cs = 0;
-
-static int coordinator(XBT_ATTRIB_UNUSED int argc, XBT_ATTRIB_UNUSED char* argv[])
-{
- int CS_used = 0; // initially the CS is idle
-
- while (1) {
- msg_task_t task = NULL;
- MSG_task_receive(&task, "coordinator");
- const char *kind = MSG_task_get_name(task); //is it a request or a release?
- if (!strcmp(kind, "request")) { // that's a request
- const char* req = MSG_task_get_data(task);
- if (CS_used) {
- XBT_INFO("CS already used.");
- msg_task_t answer = MSG_task_create("not grant", 0, 1000, NULL);
- MSG_task_send(answer, req);
- } else { // can serve it immediately
- XBT_INFO("CS idle. Grant immediately");
- msg_task_t answer = MSG_task_create("grant", 0, 1000, NULL);
- MSG_task_send(answer, req);
- CS_used = 1;
- }
- } else { // that's a release. Check if someone was waiting for the lock
- XBT_INFO("CS release. resource now idle");
- CS_used = 0;
- }
- MSG_task_destroy(task);
- kind = NULL;
- }
-
- return 0;
-}
-
-static int client(int argc, char *argv[])
-{
- xbt_assert(argc == 2);
- int my_pid = MSG_process_get_PID(MSG_process_self());
- char *my_mailbox = xbt_strdup(argv[1]);
-
- while(1){
- XBT_INFO("Client (%s) asks the request", my_mailbox);
- MSG_task_send(MSG_task_create("request", 0, 1000, my_mailbox), "coordinator");
-
- msg_task_t answer = NULL;
- MSG_task_receive(&answer, my_mailbox);
-
- const char* kind = MSG_task_get_name(answer);
-
- if (!strcmp(kind, "grant")) {
- XBT_INFO("Client (%s) got the answer (grant). Sleep a bit and release it", my_mailbox);
- if(!strcmp(my_mailbox, "1"))
- cs = 1;
- }else{
- XBT_INFO("Client (%s) got the answer (not grant). Try again", my_mailbox);
- }
-
- MSG_task_destroy(answer);
- kind = NULL;
-
- MSG_process_sleep(my_pid);
- }
- return 0;
-}
-
-int main(int argc, char *argv[])
-{
- MSG_init(&argc, argv);
-
- MC_automaton_new_propositional_symbol_pointer("cs", &cs);
-
- MSG_create_environment(argv[1]);
- MSG_function_register("coordinator", coordinator);
- MSG_function_register("client", client);
- MSG_launch_application(argv[2]);
- MSG_main();
-
- return 0;
-
-}