On arrive presque à faire quelque-chose
parent
fb06534b3f
commit
ed687937a7
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@ -33,6 +33,17 @@ int main( int argc, char **argv)
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shm_key = (key_t) atoi(argv[1]);
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MEMP * memoireP;
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const char CTRL_D = 4 ;
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int NB_FENETRES = 4;
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WINDOW *f_haut, *f_bas, *f_milieu1, *f_milieu2 ;
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WINDOW *w ;
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char c ;
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initscr() ; /* initialisation (obligatoire) de curses */
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noecho() ; /* suppression de l'echo des caracteres tapes*/
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cbreak() ; /* lecture non bufferisee */
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if((shmid = shmget(shm_key, sizeof(MEMP), IPC_CREAT|IPC_EXCL|0766)) == -1)
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{ perror("shmget"); exit(EXIT_FAILURE);}
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@ -61,34 +72,48 @@ int main( int argc, char **argv)
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V(mutex_tpa);
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sleep(10);
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const char CTRL_D = 4 ;
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int NB_FENETRES = 4;
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WINDOW *f_haut, *f_bas, *f_milieu1, *f_milieu2 ;
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WINDOW *w ;
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char c ;
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initscr() ; /* initialisation (obligatoire) de curses */
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noecho() ; /* suppression de l'echo des caracteres tapes*/
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cbreak() ; /* lecture non bufferisee */
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f_haut = creation_fenetre(LINES/NB_FENETRES,0,"F_HAUT") ;
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f_milieu1 = creation_fenetre(LINES/NB_FENETRES,LINES - 3 * (LINES/NB_FENETRES),"F_MILIEU1") ;
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f_milieu2 = creation_fenetre(LINES/NB_FENETRES,LINES - 2 * (LINES/NB_FENETRES),"F_MILIEU2") ;
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f_bas = creation_fenetre(LINES/NB_FENETRES, LINES - (LINES/NB_FENETRES),"F_BAS") ;
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while (( c = wgetch(f_bas)) != CTRL_D)
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sleep(5);
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// aDesProd => est-ce qu'il y a des producteur (sinon on quitte)
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// si = 0 alors on continue
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int aDesProd;
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int numTete = 0;
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while (1)
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{
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w= islower(c) ? f_haut : f_bas;
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aDesProd = 0;
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P(mutex_data);
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if(numTete != memoireP->tete)
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{
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numTete = memoireP->tete;
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c = memoireP->f[numTete].c;
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switch(memoireP->f[numTete].idp)
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{
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case 0 : w = f_haut;
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break;
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case 1 : w = f_milieu1;
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break;
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case 2 : w = f_milieu2;
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break;
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default :
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w = f_bas;
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}
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waddch(w,c) ;
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wrefresh(w) ;
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}
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V(mutex_data);
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// On vérifie qu'il y ait toujours des producteurs
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for(i = 0 ; i < MAX_PROD && aDesProd == 0 ; i++ )
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if(memoireP->tpa[i] != -1)
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aDesProd = 1;
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endwin() ;
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// S'il n'y a plus de producteurs, on quitte
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if(aDesProd == 0)
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{
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if(shmctl(shmid, IPC_RMID, 0) < 0)
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{ perror("shmctl"); exit(EXIT_FAILURE); }
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@ -96,7 +121,12 @@ int main( int argc, char **argv)
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if(mutex_tpa >= 0) { del_sem(sem_key_tpa); }
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if(mutex_glob >= 0) { del_sem(sem_key_glob); }
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endwin() ;
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exit(EXIT_SUCCESS);
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}
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sleep(1); // Ralentissement volontaire du programme
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}
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exit(EXIT_FAILURE);
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}
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WINDOW *creation_fenetre(int n,int d,char *t)
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@ -13,7 +13,7 @@ int main( int argc, char **argv)
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{
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if(argc < 2) { printf("Usage %s numIPC\n", argv[0]); exit(EXIT_FAILURE); }
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MEMP *memoireP;
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int mutex_data, mutex_tpa, mutex_glob, continuer = 0, i=0;
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int mutex_data, mutex_tpa, sem_global, continuer = 0, i=0;
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char c;
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MSG message;
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key_t sem_key_data = MUTEX_DATA;
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@ -28,9 +28,10 @@ int main( int argc, char **argv)
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if((memoireP = (MEMP *) shmat(shmid, 0 , 0766)) ==(void *) -1) { perror("shmat"); exit(EXIT_FAILURE); }
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if((mutex_data = open_sem( sem_key_data)) == -1) { perror("open_sem"); exit(EXIT_FAILURE); }
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if((mutex_tpa = open_sem( sem_key_tpa)) == -1) { perror("open_sem"); exit(EXIT_FAILURE); }
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if((mutex_glob = open_sem( sem_key_glob)) == -1) { perror("open_sem"); exit(EXIT_FAILURE); }
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if((sem_global = open_sem( sem_key_glob)) == -1) { perror("open_sem"); exit(EXIT_FAILURE); }
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P(mutex_glob);
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// sem_global est un sémaphore à MAX_PROD entrants.
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P(sem_global);
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P(mutex_tpa);
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for(i = 0; i < MAX_PROD && memoireP->tpa[i] != -1 ; i++);
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V(mutex_tpa);
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@ -38,23 +39,25 @@ int main( int argc, char **argv)
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if(memoireP->tpa[i] != -1) { exit(EXIT_FAILURE); }
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memoireP->tpa[i] = 0;
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memoireP->tpa[i] = getpid();
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// On quitte le producteur en tappant 0 (zéro)
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while((c = getc(stdin)) != '0')
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{
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P(mutex_data);
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if(((memoireP->queue -1) % MAX_BUF) != (memoireP->tete % MAX_BUF) )
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{
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memoireP->f[memoireP->tete].c = c;
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memoireP->f[memoireP->tete].idp = getpid();
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memoireP->f[memoireP->tete].idp = i;
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memoireP->tete = memoireP->tete +1;
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}
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V(mutex_data);
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}
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// On a fini, on remet la valeur de l'indice du processus à -1 dans le tableau des producteurs
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P(mutex_tpa);
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memoireP->tpa[i] = -1;
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V(mutex_tpa);
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V(mutex_glob);
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// On a fini, on libère l'accès à un autre producteur
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V(sem_global);
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return (EXIT_SUCCESS);
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}
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