int main()
{
int key = 123 ;
int memsize = sizeof(int) ;
int shmemId = open_shmem(key, memsize) ;
if (shmemId == -1) {
perror("shared segment opening error") ;
exit(EXIT_FAILURE) ;
}
int* buffer = (int*) attach_shmem(shmemId) ;
*buffer = 0 ;
int emptySemKey = 100 ;
int emptySemId = open_semaphore(emptySemKey) ;
int fullSemKey = 101 ;
int fullSemId = open_semaphore(fullSemKey) ;
if ((emptySemId == -1) || (fullSemId == -1)) {
perror("semaphore opening error") ;
exit(EXIT_FAILURE) ;
}
while (*buffer >= 0) {
down(fullSemId) ;
if (*buffer >= 0)
printf("%d\n", *buffer) ;
up(emptySemId) ;
}
detach_shmem(buffer) ;
}
int main(){
signal(SIGQUIT, quit);
signal(SIGINT, quit);
signal(SIGUSR2, priority);
signal(SIGUSR1, feux);
key_t cle_shmem = KEY_SHMEM;
key_t key_mutex = KEY_MUTEX;
if((int)(id_mutex = open_semaphore(key_mutex)) == -1) {
printf("Impossible d'ouvrir le mutex.\n");
quit();
}
if((int)(id_shmem = open_shmem(cle_shmem, shmem_size)) == -1) {
printf("Feux : Impossible d'ouvrir la mémoire partagée.\n");
quit();
}
if((int)(pshmem = attach_shmem(id_shmem)) == -1) {
printf("Feux : Impossible de s'attacher à la mémoire partagée.\n");
quit();
}
printf("PID Feux : %d\n", getpid());
down(id_mutex);
pshmem[PID_FEUX]=getpid();
up(id_mutex);
feux();
}
void generateurTrafficPrioritaire(){
key_t key_shmem = KEY_SHMEM;
key_t key_mutex = KEY_MUTEX;
if((id_mutex = open_semaphore(key_mutex)) == -1) {
printf("Impossible d'ouvrir le mutex.\n");
quit();
}
if((int)(id_shmem = open_shmem(key_shmem, shmem_size)) == -1) {
printf("generateurTrafficPrioritaire : Impossible d'ouvrir la mémoire partagée.\n");
quit();
}
if((int)(pshmem = attach_shmem(id_shmem)) == -1) {
printf("generateurTrafficPrioritaire : Impossible de s'attacher à la mémoire partagée.\n");
quit();
}
down(id_mutex);
pshmem[SRC_PRIO] = 0;
pshmem[DEST_PRIO] = 0;
pshmem[ID_PRIO] = 0;
pshmem[PID_PRIO]=getpid();
up(id_mutex);
int pid_coord = pshmem[PID_COORD];
printf("PID generPrio : %d\n", getpid());
printf("PID Coord : %d\n", pid_coord);
int timer, source, dest, id=0;
srand(time(NULL));
for(;;){
timer=rand()%26;
while(timer<15){
timer=rand()%26;
}
printf("Timer is UP: %d s\n", timer);
sleep(timer);
printf("Timer is DOWN: %d s\n", timer);
source=(rand()%4)+1;
dest=(rand()%4)+1;
while(dest==source){
dest=(rand()%4)+1;
}
down(id_mutex);
pshmem[SRC_PRIO] = source;
pshmem[DEST_PRIO] = dest;
pshmem[ID_PRIO] = id;
up(id_mutex);
kill(pid_coord, SIGUSR1);
printf("! --- PRIORITAIRE --- ! Source: %d, Dest: %d, ID :%d\n", source, dest, id);
printf("Coordinateur is notified by signal !\n");
id++;
}
}
