3 #include "xbt/automaton.h"
4 #include "xbt/automatonparse_promela.h"
5 #include "centralized_liveness.h"
8 #define AMOUNT_OF_CLIENTS 2
9 #define CS_PER_PROCESS 1
11 XBT_LOG_NEW_DEFAULT_CATEGORY(centralized, "my log messages");
20 int coordinator(int argc, char **argv);
21 int client(int argc, char **argv);
23 int coordinator(int argc, char *argv[])
25 xbt_dynar_t requests = xbt_dynar_new(sizeof(char *), NULL); // dynamic vector storing requests (which are char*)
26 int CS_used = 0; // initially the CS is idle
30 MSG_task_receive(&task, "coordinator");
31 const char *kind = MSG_task_get_name(task); //is it a request or a release?
32 if (!strcmp(kind, "request")) { // that's a request
33 char *req = MSG_task_get_data(task);
34 if (CS_used) { // need to push the request in the vector
35 XBT_INFO("CS already used. Queue the request");
36 xbt_dynar_push(requests, &req);
37 } else { // can serve it immediatly
38 XBT_INFO("CS idle. Grant immediatly");
39 m_task_t answer = MSG_task_create("grant", 0, 1000, NULL);
40 MSG_task_send(answer, req);
43 } else { // that's a release. Check if someone was waiting for the lock
44 if (!xbt_dynar_is_empty(requests)) {
45 XBT_INFO("CS release. Grant to queued requests (queue size: %lu)",
46 xbt_dynar_length(requests));
48 xbt_dynar_pop(requests, &req);
49 MSG_task_send(MSG_task_create("grant", 0, 1000, NULL), req);
50 } else { // nobody wants it
51 XBT_INFO("CS release. resource now idle");
55 MSG_task_destroy(task);
61 int client(int argc, char *argv[])
63 int my_pid = MSG_process_get_PID(MSG_process_self());
64 char *my_mailbox = bprintf("%s", argv[1]);
68 if(!strcmp(my_mailbox, "2"))
71 XBT_INFO("Client (%s) ask the request", my_mailbox);
72 MSG_task_send(MSG_task_create("request", 0, 1000, my_mailbox),
75 m_task_t grant = NULL;
76 MSG_task_receive(&grant, my_mailbox);
77 MSG_task_destroy(grant);
78 XBT_INFO("got the answer. Sleep a bit and release it");
80 if(!strcmp(my_mailbox, "2"))
84 MSG_task_send(MSG_task_create("release", 0, 1000, NULL),
86 MSG_process_sleep(my_pid);
92 int main(int argc, char *argv[])
96 automaton = get_automaton();
97 xbt_new_propositional_symbol(automaton,"cs2", &predCS2);
99 MSG_global_init(&argc, argv);
100 MSG_create_environment("../msg_platform.xml");
101 MSG_function_register("coordinator", coordinator);
102 MSG_function_register("client", client);
103 MSG_launch_application("deploy_centralized_liveness.xml");
104 MSG_main_liveness(automaton, argv[0]);