model-checker : worst case considered for bugged1_liveness example (bug on the last...

[simgrid.git] / examples / smpi / mc / bugged1_liveness.c

diff --git a/examples/smpi/mc/bugged1_liveness.c b/examples/smpi/mc/bugged1_liveness.c
index eab2b55..53306a7 100644 (file)
--- a/examples/smpi/mc/bugged1_liveness.c
+++ b/examples/smpi/mc/bugged1_liveness.c
@@ -1,3 +1,9 @@
+/* Copyright (c) 2013-2014. 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.          */
 /* Bug : CS requests of process 1 not satisfied                                      */
@@ -56,7 +62,7 @@ int main(int argc, char **argv){
           printf("CS already used.\n");
           xbt_dynar_push(requests, &recv_buff);
         }else{
-          if(recv_buff != 1){
+          if(recv_buff != size - 1){
             printf("CS idle. Grant immediatly.\n");
             MPI_Send(&rank, 1, MPI_INT, recv_buff, GRANT_TAG, MPI_COMM_WORLD);
             CS_used = 1;
@@ -66,7 +72,7 @@ int main(int argc, char **argv){
         if(!xbt_dynar_is_empty(requests)){
           printf("CS release. Grant to queued requests (queue size: %lu)", xbt_dynar_length(requests));
           xbt_dynar_shift(requests, &recv_buff);
-          if(recv_buff != 1){
+          if(recv_buff != size - 1){
             MPI_Send(&rank, 1, MPI_INT, recv_buff, GRANT_TAG, MPI_COMM_WORLD);
             CS_used = 1;
           }else{
@@ -83,18 +89,18 @@ int main(int argc, char **argv){
     while(1){
       printf("%d asks the request.\n", rank);
       MPI_Send(&rank, 1, MPI_INT, 0, REQUEST_TAG, MPI_COMM_WORLD);
-      if(rank == 1){
+      if(rank == size - 1){
         r = 1;
         cs = 0;
       }
       MPI_Recv(&recv_buff, 1, MPI_INT, 0, MPI_ANY_TAG, MPI_COMM_WORLD, &status);
-      if(status.MPI_TAG == GRANT_TAG && rank == 1){
+      if(status.MPI_TAG == GRANT_TAG && rank == size - 1){
         cs = 1;
         r = 0;
       }
       printf("%d got the answer. Release it.\n", rank);
       MPI_Send(&rank, 1, MPI_INT, 0, RELEASE_TAG, MPI_COMM_WORLD);
-      if(rank == 1){
+      if(rank == size - 1){
         r = 0;
         cs = 0;
       }