On arrive presque à faire quelque-chose

master
Philippe Pittoli 2011-03-20 23:27:26 +01:00
parent fb06534b3f
commit ed687937a7
2 changed files with 70 additions and 37 deletions

View File

@ -33,6 +33,17 @@ int main( int argc, char **argv)
shm_key = (key_t) atoi(argv[1]); shm_key = (key_t) atoi(argv[1]);
MEMP * memoireP; MEMP * memoireP;
const char CTRL_D = 4 ;
int NB_FENETRES = 4;
WINDOW *f_haut, *f_bas, *f_milieu1, *f_milieu2 ;
WINDOW *w ;
char c ;
initscr() ; /* initialisation (obligatoire) de curses */
noecho() ; /* suppression de l'echo des caracteres tapes*/
cbreak() ; /* lecture non bufferisee */
if((shmid = shmget(shm_key, sizeof(MEMP), IPC_CREAT|IPC_EXCL|0766)) == -1) if((shmid = shmget(shm_key, sizeof(MEMP), IPC_CREAT|IPC_EXCL|0766)) == -1)
{ perror("shmget"); exit(EXIT_FAILURE);} { perror("shmget"); exit(EXIT_FAILURE);}
@ -61,34 +72,48 @@ int main( int argc, char **argv)
V(mutex_tpa); V(mutex_tpa);
sleep(10);
const char CTRL_D = 4 ;
int NB_FENETRES = 4;
WINDOW *f_haut, *f_bas, *f_milieu1, *f_milieu2 ;
WINDOW *w ;
char c ;
initscr() ; /* initialisation (obligatoire) de curses */
noecho() ; /* suppression de l'echo des caracteres tapes*/
cbreak() ; /* lecture non bufferisee */
f_haut = creation_fenetre(LINES/NB_FENETRES,0,"F_HAUT") ; f_haut = creation_fenetre(LINES/NB_FENETRES,0,"F_HAUT") ;
f_milieu1 = creation_fenetre(LINES/NB_FENETRES,LINES - 3 * (LINES/NB_FENETRES),"F_MILIEU1") ; f_milieu1 = creation_fenetre(LINES/NB_FENETRES,LINES - 3 * (LINES/NB_FENETRES),"F_MILIEU1") ;
f_milieu2 = creation_fenetre(LINES/NB_FENETRES,LINES - 2 * (LINES/NB_FENETRES),"F_MILIEU2") ; f_milieu2 = creation_fenetre(LINES/NB_FENETRES,LINES - 2 * (LINES/NB_FENETRES),"F_MILIEU2") ;
f_bas = creation_fenetre(LINES/NB_FENETRES, LINES - (LINES/NB_FENETRES),"F_BAS") ; f_bas = creation_fenetre(LINES/NB_FENETRES, LINES - (LINES/NB_FENETRES),"F_BAS") ;
while (( c = wgetch(f_bas)) != CTRL_D) sleep(5);
// aDesProd => est-ce qu'il y a des producteur (sinon on quitte)
// si = 0 alors on continue
int aDesProd;
int numTete = 0;
while (1)
{ {
w= islower(c) ? f_haut : f_bas; aDesProd = 0;
P(mutex_data);
if(numTete != memoireP->tete)
{
numTete = memoireP->tete;
c = memoireP->f[numTete].c;
switch(memoireP->f[numTete].idp)
{
case 0 : w = f_haut;
break;
case 1 : w = f_milieu1;
break;
case 2 : w = f_milieu2;
break;
default :
w = f_bas;
}
waddch(w,c) ; waddch(w,c) ;
wrefresh(w) ; wrefresh(w) ;
} }
V(mutex_data);
// On vérifie qu'il y ait toujours des producteurs
for(i = 0 ; i < MAX_PROD && aDesProd == 0 ; i++ )
if(memoireP->tpa[i] != -1)
aDesProd = 1;
endwin() ; // S'il n'y a plus de producteurs, on quitte
if(aDesProd == 0)
{
if(shmctl(shmid, IPC_RMID, 0) < 0) if(shmctl(shmid, IPC_RMID, 0) < 0)
{ perror("shmctl"); exit(EXIT_FAILURE); } { perror("shmctl"); exit(EXIT_FAILURE); }
@ -96,7 +121,12 @@ int main( int argc, char **argv)
if(mutex_tpa >= 0) { del_sem(sem_key_tpa); } if(mutex_tpa >= 0) { del_sem(sem_key_tpa); }
if(mutex_glob >= 0) { del_sem(sem_key_glob); } if(mutex_glob >= 0) { del_sem(sem_key_glob); }
endwin() ;
exit(EXIT_SUCCESS); exit(EXIT_SUCCESS);
}
sleep(1); // Ralentissement volontaire du programme
}
exit(EXIT_FAILURE);
} }
WINDOW *creation_fenetre(int n,int d,char *t) WINDOW *creation_fenetre(int n,int d,char *t)

View File

@ -13,7 +13,7 @@ int main( int argc, char **argv)
{ {
if(argc < 2) { printf("Usage %s numIPC\n", argv[0]); exit(EXIT_FAILURE); } if(argc < 2) { printf("Usage %s numIPC\n", argv[0]); exit(EXIT_FAILURE); }
MEMP *memoireP; MEMP *memoireP;
int mutex_data, mutex_tpa, mutex_glob, continuer = 0, i=0; int mutex_data, mutex_tpa, sem_global, continuer = 0, i=0;
char c; char c;
MSG message; MSG message;
key_t sem_key_data = MUTEX_DATA; key_t sem_key_data = MUTEX_DATA;
@ -28,9 +28,10 @@ int main( int argc, char **argv)
if((memoireP = (MEMP *) shmat(shmid, 0 , 0766)) ==(void *) -1) { perror("shmat"); exit(EXIT_FAILURE); } if((memoireP = (MEMP *) shmat(shmid, 0 , 0766)) ==(void *) -1) { perror("shmat"); exit(EXIT_FAILURE); }
if((mutex_data = open_sem( sem_key_data)) == -1) { perror("open_sem"); exit(EXIT_FAILURE); } if((mutex_data = open_sem( sem_key_data)) == -1) { perror("open_sem"); exit(EXIT_FAILURE); }
if((mutex_tpa = open_sem( sem_key_tpa)) == -1) { perror("open_sem"); exit(EXIT_FAILURE); } if((mutex_tpa = open_sem( sem_key_tpa)) == -1) { perror("open_sem"); exit(EXIT_FAILURE); }
if((mutex_glob = open_sem( sem_key_glob)) == -1) { perror("open_sem"); exit(EXIT_FAILURE); } if((sem_global = open_sem( sem_key_glob)) == -1) { perror("open_sem"); exit(EXIT_FAILURE); }
P(mutex_glob); // sem_global est un sémaphore à MAX_PROD entrants.
P(sem_global);
P(mutex_tpa); P(mutex_tpa);
for(i = 0; i < MAX_PROD && memoireP->tpa[i] != -1 ; i++); for(i = 0; i < MAX_PROD && memoireP->tpa[i] != -1 ; i++);
V(mutex_tpa); V(mutex_tpa);
@ -38,23 +39,25 @@ int main( int argc, char **argv)
if(memoireP->tpa[i] != -1) { exit(EXIT_FAILURE); } if(memoireP->tpa[i] != -1) { exit(EXIT_FAILURE); }
memoireP->tpa[i] = 0; memoireP->tpa[i] = 0;
memoireP->tpa[i] = getpid(); // On quitte le producteur en tappant 0 (zéro)
while((c = getc(stdin)) != '0') while((c = getc(stdin)) != '0')
{ {
P(mutex_data); P(mutex_data);
if(((memoireP->queue -1) % MAX_BUF) != (memoireP->tete % MAX_BUF) ) if(((memoireP->queue -1) % MAX_BUF) != (memoireP->tete % MAX_BUF) )
{ {
memoireP->f[memoireP->tete].c = c; memoireP->f[memoireP->tete].c = c;
memoireP->f[memoireP->tete].idp = getpid(); memoireP->f[memoireP->tete].idp = i;
memoireP->tete = memoireP->tete +1; memoireP->tete = memoireP->tete +1;
} }
V(mutex_data); V(mutex_data);
} }
// On a fini, on remet la valeur de l'indice du processus à -1 dans le tableau des producteurs
P(mutex_tpa); P(mutex_tpa);
memoireP->tpa[i] = -1;
V(mutex_tpa); V(mutex_tpa);
V(mutex_glob);
// On a fini, on libère l'accès à un autre producteur
V(sem_global);
return (EXIT_SUCCESS); return (EXIT_SUCCESS);
} }