-#include <stdio.h>
-#include <mpi.h>
-#include <simgrid/modelchecker.h>
-
-#define GRANT_TAG 0
-#define REQUEST_TAG 1
-#define RELEASE_TAG 2
-
-int r, cs;
-
-static int predR(){
- return r;
-}
-
-static int predCS(){
- return cs;
-}
-
-
-int main(int argc, char **argv){
-
- //int i;
- int err, size, rank;
- int recv_buff;
- MPI_Status status;
- int CS_used = 0;
-
- /* Initialize MPI */
- err = MPI_Init(&argc, &argv);
- if(err != MPI_SUCCESS){
- printf("MPI initialization failed !\n");
- exit(1);
- }
-
- MC_automaton_new_propositional_symbol("r", &predR);
- MC_automaton_new_propositional_symbol("cs", &predCS);
-
- MC_ignore(&(status.count), sizeof(status.count));
-
- /* Get number of processes */
- err = MPI_Comm_size(MPI_COMM_WORLD, &size);
- /* Get id of this process */
- err = MPI_Comm_rank(MPI_COMM_WORLD, &rank);
-
- if(rank == 0){ /* Coordinator */
- //for(i=0; i<size-1; i++) {
- while(1){
- MPI_Recv(&recv_buff, 1, MPI_INT, MPI_ANY_SOURCE, MPI_ANY_TAG, MPI_COMM_WORLD, &status);
- if(status.MPI_TAG == REQUEST_TAG){
- if(CS_used){
- printf("CS already used.\n");
- }else{
- if(recv_buff != 1){
- printf("CS idle. Grant immediatly.\n");
- MPI_Send(&rank, 1, MPI_INT, recv_buff, GRANT_TAG, MPI_COMM_WORLD);
- CS_used = 1;
- }
- }
- }else{
- printf("CS release. Resource now idle.\n");
- CS_used = 0;
- }
- }
- }else{ /* Client */
- while(1){
- printf("%d asks the request.\n", rank);
- MPI_Send(&rank, 1, MPI_INT, 0, REQUEST_TAG, MPI_COMM_WORLD);
- if(rank == 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){
- 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){
- r = 0;
- cs = 0;
- }
- }
- }
-
- MPI_Finalize();
-
- return 0;
-}
