int main(int argc, char **argv) {
int nb_fils, shm_id;
char *adr_att;
key_t cle;
/* Nombre d'arguments invalide */
if (argc != 2) {
printf("Usage : ./remonte_ipc nb_fils\n");
return EXIT_FAILURE;
}
/* Nombre de file invalide */
nb_fils = atoi(argv[1]);
if (!nb_fils) {
printf("nb_fils doit être un nombre strictement positif.\n");
return EXIT_FAILURE;
}
/* Création clé = (nom du programme, 8 LSB du pid) */
if ((cle = ftok(argv[0], getpid() & 0xFF)) == -1) {
perror("Erreur ftok.\n");
return EXIT_FAILURE;
}
/* Création ID du segment partagé */
if ((shm_id = shmget(cle, nb_fils * sizeof(int), 0666 | IPC_CREAT)) == -1) {
perror("Erreur shmget.\n");
return EXIT_FAILURE;
}
/* On récupère l'addresse du segment partagé */
adr_att = shmat(shm_id, NULL, 0600);
remonte_partagee(nb_fils, shm_id, adr_att);
shmdt_shmctl(adr_att, shm_id);
/* On supprime le segment partagé */
if (shmctl(shm_id, IPC_RMID, NULL) == -1) {
perror("Erreur shmctl.\n");
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
}
int main(int argc, char* argv[]) {
key_t cle;
int nb_fils, i;
if (argc != 2) {
printf("%derror syntaxe : %s nbProcessus \n", argc, argv[0]);
exit(1);
}
nb_fils = atoi(argv[1]);
/*------------------------------------------------------*/
/* creation segment memoir */
/*------------------------------------------------------*/
taille = (nb_fils + 1) * sizeof(int);
char *shm_nom = "/remonte_posix_partagee";
if ((shm_id = shm_open(shm_nom, O_CREAT | O_RDWR, 0600)) == -1) {
perror("shm_open");
exit(-1);
}
if (ftruncate(shm_id, taille) == -1) {
perror("ftruncate");
exit(-1);
}
if ((adr_att = mmap(NULL, taille, PROT_READ | PROT_WRITE, MAP_SHARED,
shm_id, 0)) == MAP_FAILED) {
perror("mmap");
exit(-1);
}
p_int = (int*) adr_att;
p_int[0] = 0;
/*------------------------------------------------------*/
/* traitement liberation memoir partage */
/*------------------------------------------------------*/
remonte_partagee(nb_fils);
while (p_int[0] == 0) {
printf("attend while %d \n", p_int[0]);
sleep(1);
}
int result = 0;
for (i = 1; i < nb_fils + 1; i++) {
printf("pere from fils %d ===> %d \n", i, p_int[i]);
result += p_int[i];
}
printf("pere %d : la somme est %d \n", getpid(), result);
if (shm_unlink(shm_nom) == -1) {
perror("shm_unlink");
exit(-1);
}
return EXIT_SUCCESS;
}
int main(int argc, char* argv[]) {
key_t cle;
int taille = 0;
int nb_fils, i;
if (argc != 2) {
printf("%derror syntaxe : %s nbProcessus \n", argc, argv[0]);
exit(1);
}
nb_fils = atoi(argv[1]);
/*------------------------------------------------------*/
/* creation segment memoir */
/*------------------------------------------------------*/
taille = (nb_fils + 1) * sizeof(int);
char code = 0;
code = getpid() & 255;
if (code == 0) {
printf("error code = 0");
exit(-1);
}
if ((cle = ftok(argv[0], code)) == -1) {
perror("ftok");
exit(-1);
}
if ((shm_id = shmget(cle, taille, IPC_CREAT | 0666)) < 0) {
perror("shmget");
exit(-1);
}
if ((adr_att = shmat(shm_id, NULL, 0600)) == (void *) -1) {
perror("shmat");
exit(-1);
}
tab_val_random = (int*) adr_att;
tab_val_random[0] = 0;
/*------------------------------------------------------*/
/* traitement liberation memoir partage */
/*------------------------------------------------------*/
remonte_partagee(nb_fils);
while (tab_val_random[0] == 0) {
printf("attend while %d \n", tab_val_random[0]);
sleep(1);
}
int result = 0;
for (i = 1; i < nb_fils + 1; i++) {
printf("shm%d recu %d \n", i, tab_val_random[i]);
result += tab_val_random[i];
}
printf("pere %d : la somme est %d \n", getpid(), result);
shmdt(adr_att);
shmctl(shm_id, IPC_RMID, NULL);
return EXIT_SUCCESS;
}
