/***************** Centralized Mutual Exclusion Algorithm *********************/
/* This example implements a centralized mutual exclusion algorithm. */
-/* CS requests of client 2 not satisfied */
+/* Bug : CS requests of client 1 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");
+XBT_LOG_NEW_DEFAULT_CATEGORY(bugged1_liveness, "my log messages");
int r=0;
int cs=0;
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;
+
+ int CS_used = 0;
+ msg_task_t task = NULL, answer = NULL;
+ xbt_dynar_t requests = xbt_dynar_new(sizeof(char *), NULL);
+ char *req;
+
+ while(1){
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);
+ const char *kind = MSG_task_get_name(task);
+ if (!strcmp(kind, "request")) {
+ req = MSG_task_get_data(task);
+ if (CS_used) {
+ XBT_INFO("CS already used. Queue the request.");
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 {
+ if(strcmp(req, "1") != 0){
+ XBT_INFO("CS idle. Grant immediatly");
+ answer = MSG_task_create("grant", 0, 1000, NULL);
+ MSG_task_send(answer, req);
+ CS_used = 1;
+ answer = NULL;
+ }
}
- } else { // that's a release. Check if someone was waiting for the lock
- if (xbt_dynar_length(requests) > 0) {
+ } else {
+ if (!xbt_dynar_is_empty(requests)) {
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_dynar_shift(requests, &req);
+ if(strcmp(req, "1") != 0){
+ MSG_task_send(MSG_task_create("grant", 0, 1000, NULL), req);
+ }else{
+ xbt_dynar_push(requests, &req);
+ CS_used = 0;
+ }
+ }else{
XBT_INFO("CS release. resource now idle");
CS_used = 0;
- todo--;
}
}
MSG_task_destroy(task);
+ task = NULL;
+ kind = NULL;
+ req = NULL;
}
- XBT_INFO("Received all releases, quit now");
+
return 0;
}
{
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++) {
-
+ char *my_mailbox = xbt_strdup(argv[1]);
+ msg_task_t grant = NULL, release = NULL;
+
+ while(1){
XBT_INFO("Ask the request");
MSG_task_send(MSG_task_create("request", 0, 1000, my_mailbox), "coordinator");
- if(strcmp(my_mailbox, "2") == 0){
+ if(strcmp(my_mailbox, "1") == 0){
r = 1;
cs = 0;
- XBT_DEBUG("Propositions changed : r=1, cs=0");
+ XBT_INFO("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)){
+ if((strcmp(my_mailbox, "1") == 0) && (strcmp("grant", kind) == 0)){
cs = 1;
r = 0;
- XBT_DEBUG("Propositions changed : r=0, cs=1");
+ XBT_INFO("Propositions changed : r=0, cs=1");
}
-
MSG_task_destroy(grant);
+ grant = NULL;
+ kind = NULL;
+
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");
+
+ release = MSG_task_create("release", 0, 1000, NULL);
+ MSG_task_send(release, "coordinator");
+
+ release = NULL;
MSG_process_sleep(my_pid);
- if(strcmp(my_mailbox, "2") == 0){
+ if(strcmp(my_mailbox, "1") == 0){
cs=0;
r=0;
- XBT_DEBUG("Propositions changed : r=0, cs=0");
+ XBT_INFO("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_init(&argc, argv);
+
+ char **options = &argv[1];
+
+ MSG_config("model-check/property","promela_bugged1_liveness");
+ MC_automaton_new_propositional_symbol("r", &predR);
+ MC_automaton_new_propositional_symbol("cs", &predCS);
+
+ const char* platform_file = options[0];
+ const char* application_file = options[1];
- MSG_global_init(&argc, argv);
- MSG_create_environment("../msg_platform.xml");
+ MSG_create_environment(platform_file);
MSG_function_register("coordinator", coordinator);
MSG_function_register("client", client);
- MSG_launch_application("deploy_bugged1_liveness.xml");
- MSG_main_liveness(automaton, argv[0]);
+ MSG_launch_application(application_file);
+ MSG_main();
return 0;
}
