+/* Copyright (c) 2010-2015. 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. */
+
/***************** Centralized Mutual Exclusion Algorithm *********************/
/* This example implements a centralized mutual exclusion algorithm. */
/* There is no bug on it, it is just provided to test the state space */
/* reduction of DPOR. */
/******************************************************************************/
/***************** Centralized Mutual Exclusion Algorithm *********************/
/* This example implements a centralized mutual exclusion algorithm. */
/* There is no bug on it, it is just provided to test the state space */
/* reduction of DPOR. */
/******************************************************************************/
#define AMOUNT_OF_CLIENTS 4
#define CS_PER_PROCESS 2
XBT_LOG_NEW_DEFAULT_CATEGORY(centralized, "my log messages");
#define AMOUNT_OF_CLIENTS 4
#define CS_PER_PROCESS 2
XBT_LOG_NEW_DEFAULT_CATEGORY(centralized, "my log messages");
-int coordinator(int argc, char **argv);
-int client(int argc, char **argv);
-
-int coordinator(int argc, char *argv[])
+static 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
{
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
if (CS_used) { // need to push the request in the vector
XBT_INFO("CS already used. Queue the request");
xbt_dynar_push(requests, &req);
if (CS_used) { // need to push the request in the vector
XBT_INFO("CS already used. Queue the request");
xbt_dynar_push(requests, &req);
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
if (!xbt_dynar_is_empty(requests)) {
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
if (!xbt_dynar_is_empty(requests)) {
MSG_task_send(MSG_task_create("grant", 0, 1000, NULL), req);
todo--;
} else { // nobody wants it
MSG_task_send(MSG_task_create("grant", 0, 1000, NULL), req);
todo--;
} else { // nobody wants it
- MSG_task_send(MSG_task_create("request", 0, 1000, my_mailbox),
- "coordinator");
+ MSG_task_send(MSG_task_create("request", 0, 1000, my_mailbox), "coordinator");
// wait the answer
msg_task_t grant = NULL;
MSG_task_receive(&grant, my_mailbox);
MSG_task_destroy(grant);
XBT_INFO("got the answer. Sleep a bit and release it");
MSG_process_sleep(1);
// wait the answer
msg_task_t grant = NULL;
MSG_task_receive(&grant, my_mailbox);
MSG_task_destroy(grant);
XBT_INFO("got the answer. Sleep a bit and release it");
MSG_process_sleep(1);
- MSG_task_send(MSG_task_create("release", 0, 1000, NULL),
- "coordinator");
+ MSG_task_send(MSG_task_create("release", 0, 1000, NULL), "coordinator");
MSG_process_sleep(my_pid);
}
XBT_INFO("Got all the CS I wanted, quit now");
MSG_process_sleep(my_pid);
}
XBT_INFO("Got all the CS I wanted, quit now");
MSG_function_register("coordinator", coordinator);
MSG_function_register("client", client);
MSG_function_register("coordinator", coordinator);
MSG_function_register("client", client);