1 /***************** Producer/Consumer Algorithm *************************/
2 /* This example implements a producer/consumer algorithm. */
3 /* If consumer work before producer, message is empty */
4 /***********************************************************************/
9 #include "xbt/automaton.h"
10 #include "xbt/automatonparse_promela.h"
11 #include "bugged2_liveness.h"
14 XBT_LOG_NEW_DEFAULT_CATEGORY(example_liveness_with_cycle, "my log messages");
39 int coordinator(int argc, char *argv[])
41 xbt_dynar_t requests = xbt_dynar_new(sizeof(char *), NULL);
46 MSG_task_receive(&task, "coordinator");
47 const char *kind = MSG_task_get_name(task);
48 if (!strcmp(kind, "request")) {
49 char *req = MSG_task_get_data(task);
51 XBT_INFO("CS already used. Queue the request");
52 xbt_dynar_push(requests, &req);
54 m_task_t answer = MSG_task_create("grant", 0, 1000, NULL);
55 MSG_task_send(answer, req);
57 XBT_INFO("CS idle. Grant immediatly");
60 if (xbt_dynar_length(requests) > 0) {
61 XBT_INFO("CS release. Grant to queued requests");
63 xbt_dynar_pop(requests, &req);
64 MSG_task_send(MSG_task_create("grant", 0, 1000, NULL), req);
66 XBT_INFO("CS_realase, ressource now idle");
71 MSG_task_destroy(task);
79 int producer(int argc, char *argv[])
82 char * my_mailbox = bprintf("%s", argv[1]);
87 const char *mess = "message";
90 XBT_INFO("Producer ask the request");
91 MSG_task_send(MSG_task_create("request", 0, 1000, my_mailbox), "coordinator");
94 m_task_t grant = NULL;
95 MSG_task_receive(&grant, my_mailbox);
96 MSG_task_destroy(grant);
100 /* Push message (size of buffer = 1) */
101 buffer = strdup(mess);
104 MSG_task_send(MSG_task_create("release", 0, 1000, my_mailbox), "coordinator");
118 int consumer(int argc, char *argv[])
121 char * my_mailbox = bprintf("%s", argv[1]);
128 XBT_INFO("Consumer ask the request");
129 MSG_task_send(MSG_task_create("request", 0, 1000, my_mailbox), "coordinator");
131 /* Wait the answer */
132 m_task_t grant = NULL;
133 MSG_task_receive(&grant, my_mailbox);
134 MSG_task_destroy(grant);
139 mess = malloc(8*sizeof(char));
140 mess = strdup(buffer);
144 MSG_task_send(MSG_task_create("release", 0, 1000, my_mailbox), "coordinator");
146 /* Display message */
147 XBT_INFO("Message : %s", mess);
148 if(strcmp(mess, "") != 0)
165 int main(int argc, char *argv[])
168 buffer = malloc(8*sizeof(char));
173 automaton = get_automaton();
174 xbt_new_propositional_symbol(automaton,"pready", &predPready);
175 xbt_new_propositional_symbol(automaton,"cready", &predCready);
176 xbt_new_propositional_symbol(automaton,"consume", &predConsume);
177 xbt_new_propositional_symbol(automaton,"produce", &predProduce);
179 MSG_global_init(&argc, argv);
180 MSG_create_environment("../msg_platform.xml");
181 MSG_function_register("coordinator", coordinator);
182 MSG_function_register("consumer", consumer);
183 MSG_function_register("producer", producer);
184 MSG_launch_application("deploy_bugged2_liveness.xml");
185 MSG_main_liveness(automaton, argv[0]);