+++ /dev/null
-/***************** Centralized Mutual Exclusion Algorithm *********************/
-/* This example implements a centralized mutual exclusion algorithm. */
-/* CS requests of client 2 not satisfied */
-/* LTL property checked : G(r->F(cs)); (r=request of CS, cs=CS ok) */
-/******************************************************************************/
-
-#include "msg/msg.h"
-#include "mc/mc.h"
-#include "xbt/automaton.h"
-#include "xbt/automatonparse_promela.h"
-#include "bugged1_liveness.h"
-#include "y.tab.c"
-
-#define AMOUNT_OF_CLIENTS 2
-#define CS_PER_PROCESS 1
-
-XBT_LOG_NEW_DEFAULT_CATEGORY(example_liveness_with_cycle, "my log messages");
-
-
-int r=0;
-int cs=0;
-
-int predR(){
- return r;
-}
-
-int predCS(){
- return cs;
-}
-
-
-int coordinator(int argc, char *argv[])
-{
- xbt_dynar_t requests = xbt_dynar_new(sizeof(char *), NULL); // dynamic vector storing requests (which are char*)
- int CS_used = 0; // initially the CS is idle
- int todo = AMOUNT_OF_CLIENTS * CS_PER_PROCESS; // amount of releases we are expecting
- while (todo > 0) {
- m_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
- char *req = MSG_task_get_data(task);
- if (CS_used) { // need to push the request in the vector
- XBT_INFO("CS already used. Queue the request of client %d", atoi(req) +1);
- xbt_dynar_push(requests, &req);
- } else { // can serve it immediatly
- if(strcmp(req, "1") == 0){
- m_task_t answer = MSG_task_create("grant", 0, 1000, NULL);
- MSG_task_send(answer, req);
- CS_used = 1;
- XBT_INFO("CS idle. Grant immediatly");
- }
- }
- } else { // that's a release. Check if someone was waiting for the lock
- if (xbt_dynar_length(requests) > 0) {
- XBT_INFO("CS release. Grant to queued requests (queue size: %lu)", xbt_dynar_length(requests));
- char *req ;
- xbt_dynar_get_cpy(requests, (xbt_dynar_length(requests) - 1), &req);
- if(strcmp(req, "1") == 0){
- xbt_dynar_pop(requests, &req);
- MSG_task_send(MSG_task_create("grant", 0, 1000, NULL), req);
- todo--;
- }else{
- xbt_dynar_pop(requests, &req);
- MSG_task_send(MSG_task_create("notgrant", 0, 1000, NULL), req);
- CS_used = 0;
- todo--;
- }
- } else { // nobody wants it
- XBT_INFO("CS release. resource now idle");
- CS_used = 0;
- todo--;
- }
- }
- MSG_task_destroy(task);
- }
- XBT_INFO("Received all releases, quit now");
- return 0;
-}
-
-int client(int argc, char *argv[])
-{
- int my_pid = MSG_process_get_PID(MSG_process_self());
-
- char *my_mailbox = bprintf("%s", argv[1]);
- int i;
-
- // request the CS 4 times, sleeping a bit in between
- for (i = 0; i < CS_PER_PROCESS; i++) {
-
- XBT_INFO("Ask the request");
- MSG_task_send(MSG_task_create("request", 0, 1000, my_mailbox), "coordinator");
-
- if(strcmp(my_mailbox, "2") == 0){
- r = 1;
- cs = 0;
- XBT_DEBUG("Propositions changed : r=1, cs=0");
- }
-
- // wait the answer
- m_task_t grant = NULL;
- MSG_task_receive(&grant, my_mailbox);
- const char *kind = MSG_task_get_name(grant);
-
- if((strcmp(my_mailbox, "2") == 0) && (strcmp("grant", kind) == 0)){
- cs = 1;
- r = 0;
- XBT_DEBUG("Propositions changed : r=0, cs=1");
- }
-
-
- MSG_task_destroy(grant);
- XBT_INFO("%s got the answer. Sleep a bit and release it", argv[1]);
- MSG_process_sleep(1);
- MSG_task_send(MSG_task_create("release", 0, 1000, NULL), "coordinator");
-
- MSG_process_sleep(my_pid);
-
- if(strcmp(my_mailbox, "2") == 0){
- cs=0;
- r=0;
- XBT_DEBUG("Propositions changed : r=0, cs=0");
- }
-
- }
-
- XBT_INFO("Got all the CS I wanted (%s), quit now", my_mailbox);
- return 0;
-}
-
-int main(int argc, char *argv[])
-{
- init();
- yyparse();
- automaton = get_automaton();
- xbt_new_propositional_symbol(automaton,"r", &predR);
- xbt_new_propositional_symbol(automaton,"cs", &predCS);
-
- MSG_global_init(&argc, argv);
- MSG_create_environment("../msg_platform.xml");
- MSG_function_register("coordinator", coordinator);
- MSG_function_register("client", client);
- MSG_launch_application("deploy_bugged1_liveness.xml");
- MSG_main_liveness(automaton, argv[0]);
-
- return 0;
-}
