static void sigHandler(int signo)
{
if(signo == common_sig_t[0]) // start
{
if( semVal(pkg->sem_id , 0) > 0 )
{
semlock(pkg->sem_id , 0);
}
}
else if(signo == common_sig_t[1]) // stop
{
if( semVal(pkg->sem_id , 0) == 0)
{
semunlock(pkg->sem_id , 0);
}
}
else if(signo == common_sig_t[2]) // koniec
{
semlock(pkg->sem_id, 4); // ustawienie flagi sygnalu do zabicia procesu nr 2
if( semVal(pkg->sem_id , 0) > 0 ) // jesli dostaniemy podczas waita
{
semlock(pkg->sem_id , 0);
}
}
}
static void * mainLoop(void * write_pipe_fd )
{
char * shm = pkg->shm_ptr;
int * fd = (int *)write_pipe_fd;
killfd = *fd;
unsigned char readed_bytes;
while(1)
{
semlock(pkg->sem_id, 2);
if( !semVal(pkg->sem_id , 4) )
{
kill(pid_p3,communication_sig_t[2]); // poinformowanie procesu 3
if( semVal(pkg->sem_id, 3) ) // ustawienie flagi sygnalu do zabicia procesu nr 1
{
semlock(pkg->sem_id, 3);
}
if( semVal(pkg->sem_id , 0) > 0 )
{
semlock(pkg->sem_id , 0); // jbc odblokowanie jesli dostalismy kill podczas stopu
}
semunlock(pkg->sem_id, 1); // wpuszczenie proc 1 do sprawdzenia flagi i zabicia sie
write(killfd, &killfd , sizeof(char) ); // odblokowanie procesu nr 3 aby sie zabil
break;
/*pthread_cancel(thread);
pthread_testcancel(); */
}
readed_bytes = (unsigned char)shm[0];
write(*fd, &shm[1] ,readed_bytes);
semunlock(pkg->sem_id , 1);
}
pthread_exit(EXIT_SUCCESS);
}
static void communicationSigHandler(int signo)
{
if(signo == communication_sig_t[0]) // start
{
if( semVal(pkg->sem_id , 0) > 0 )
{
semlock(pkg->sem_id , 0);
}
}
else if(signo == communication_sig_t[1]) // stop
{
if( semVal(pkg->sem_id , 0) == 0)
{
semunlock(pkg->sem_id , 0);
}
}
else if(signo == communication_sig_t[2]) // koniec
{
sigHandler(common_sig_t[2]);
}
}
void Entree(TypeBarriere typeBarriere)
{
//definition des id d'acces au boites aux lettres et semaphores
long msgBufEntreeId;
long msgbufRequeteId;
unsigned short semElementSyncEntree;
TypeZone zoneEcranRequete;
switch (typeBarriere)
{
case PROF_BLAISE_PASCAL :
//deja initialises aux bonnes valeurs;
msgBufEntreeId = MSGBUF_ID_ENTREE_P;
msgbufRequeteId = MSGBUF_ID_REQUETE_P;
semElementSyncEntree = SEMELM_SINC_ENTREE_P;
zoneEcranRequete = REQUETE_R1;
break;
case AUTRE_BLAISE_PASCAL :
msgBufEntreeId = MSGBUF_ID_ENTREE_A;
msgbufRequeteId = MSGBUF_ID_REQUETE_A;
semElementSyncEntree = SEMELM_SINC_ENTREE_A;
zoneEcranRequete = REQUETE_R2;
break;
case ENTREE_GASTON_BERGER :
msgBufEntreeId = MSGBUF_ID_ENTREE_GB;
msgbufRequeteId = MSGBUF_ID_REQUETE_GB;
semElementSyncEntree = SEMELM_SINC_ENTREE_GB;
zoneEcranRequete = REQUETE_R3;
break;
default :
std::cerr << "not an entry process error" << std::endl;
return;
break;
}
//initialisation
init();
//phase moteur
pid_t pidCurr;
Voiture voiture;
for(;;)
{
//appel bloquant, attente d'une demande d'entree
if(msgrcv(msgbuffId, &voiture, sizeof(Voiture)-sizeof(long), msgBufEntreeId, 0) == -1)
continue; // sarestart (sur les erreurs aussi)
DessinerVoitureBarriere(typeBarriere, voiture.typeUsager);
if(semVal(SEMELM_PLACEDISPO) > 0)
{
if((pidCurr = GarerVoiture(typeBarriere)) != -1)
{
semP(SEMELM_PLACEDISPO);
mapVoiturier.insert(std::pair<pid_t, Voiture>(pidCurr, voiture));
}
}
else
{
//affiche requete
AfficherRequete(typeBarriere,voiture.typeUsager,voiture.heureArrivee);
Requete re;
re.type = msgbufRequeteId;
re.heureArrivee = voiture.heureArrivee;
re.typeUsager = voiture.typeUsager;
if(msgsnd(msgbuffId, &re, sizeof(Requete)-sizeof(long), 0 )==-1);
semP(semElementSyncEntree);
if((pidCurr = GarerVoiture(typeBarriere)) != -1)
{
//met à jour l'heure d'entree dans le parking
voiture.heureArrivee = time(NULL);
mapVoiturier.insert(std::pair<pid_t, Voiture>(pidCurr, voiture));
}
Effacer(zoneEcranRequete);
}
}
}
