static int player_turn(t_lemipc *lemipc)
{
if (set_sem(lemipc, LOCK) == EXIT_FAILURE)
return (EXIT_FAILURE);
if ((int)lemipc->pos == -1 && put_player_on_map(lemipc) == EXIT_FAILURE)
return (set_sem(lemipc, UNLOCK));
if (lemipc->is_alone == TRUE)
lemipc->is_alone = player_is_alone(lemipc, FALSE);
else if (player_is_alone(lemipc, FALSE) == TRUE)
{
lemipc->is_dead = TRUE;
lemipc->is_alone = TRUE;
}
if (lemipc->is_alone == FALSE)
{
if (lemipc->is_dead == FALSE)
lemipc->is_dead = player_is_surrounded(lemipc);
if (lemipc->is_dead == FALSE)
move_algorithm(lemipc);
}
usleep(SLEEP);
if (lemipc->killed_by != 0 && send_msg(lemipc) == EXIT_FAILURE)
return (EXIT_FAILURE);
recieve_msg(lemipc);
return (set_sem(lemipc, UNLOCK));
}
int main(int argc, char **argv) {
shmid = shmget( IPC_PRIVATE, sizeof( varijable ) * 100, 0600 );
if( shmid == -1 ){
printf( "Greska prilikom stvaranja zajednicke memorije\n" );
exit(1);
}
zajednicke = ( varijable * ) shmat( shmid, NULL, 0 );
get_sem( 5, & (zajednicke->semid) );
// postavljanje semafora
set_sem( 5, semPUN, zajednicke->semid );
set_sem( 0, semPRAZAN, zajednicke->semid );
set_sem( 1, semPISI, zajednicke->semid );
set_sem( 0, semGO1, zajednicke->semid );
set_sem( 0, semGO2, zajednicke->semid );
sigset( SIGINT, clean_exit );
switch( fork() ){
case -1:
printf( "Greska prilikom stvaranja procesa!\n" );
break;
case 0:
proizvodac( 0 );
exit( 0 );
break;
}
switch( fork() ){
case -1:
printf( "Greska prilikom stvaranja procesa!\n" );
break;
case 0:
proizvodac( 1 );
exit( 0 );
break;
}
switch( fork() ){
case -1:
printf( "Greska prilikom stvaranja procesa!\n" );
break;
case 0:
potrosac();
exit( 0 );
break;
}
wait( NULL ); wait( NULL ); wait( NULL );
clean_exit( 0 );
return 0;
}
int main()
{
int i = 0;
/*Signalhandler registrieren*/
struct sigaction aktion;
aktion.sa_handler = &programmabbruch;
sigemptyset(&aktion.sa_mask);
if (sigaction(SIGINT,&aktion,NULL) == -1)
{
perror("set actionhandler");
exit(EXIT_FAILURE);
}
/* Zufallsgenerator initialisieren */
srand(time(NULL));
/*Die Kindprozesse erben den Signalhandler, da wir diesen bereits vor dem fork registrieren.
Damit der Vater (Kreuzung) weiss, dass er der Vater ist, speichern wir an dieser Stelle die PID.*/
vaterpid = getpid();
/* Semaphoren erzeugen */
semid = erzeuge_sem(ANZAHL_AUTOS+2, 0xaffe);
if (semid == -1)
{
fprintf(stderr, "Semaphore noch in Benutzung.\n");
exit(-1);
}
/* Semaphoren initialisieren */
init_sem(semid, ANZAHL_AUTOS+1, 1);
/* Semaphore fuer Deadlock Entsperrung initialisieren */
set_sem(semid, ANZAHL_AUTOS+1, ANZAHL_AUTOS);
/* Autos forken */
for (i = 0; i < ANZAHL_AUTOS; i++)
{
autopids[i] = erzeugeauto(i);
sleep(1);
}
/* Ueberwachungs-Prozess (Vater) */
vater();
return 0;
}
void vater()
{
while (1)
{
sleep(20);
if (deadlock_observer())
{
/* Zufaellige Freigabe eines der Autos */
int freigabe = rand()%ANZAHL_AUTOS;
printf("DEADLOCK - Freigabe fuer Auto %d\n", freigabe);
set_sem(semid, ANZAHL_AUTOS+1, freigabe);
}
}
}
void kind(int pos)
{
enum STATUS state = HERANFAHREN;
while (1)
{
/* Wagen steht an der Kreuzung */
state = WARTEN;
p(semid, pos);
printf("Auto %d steht an der Kreuzung.\n", pos);
/* Vergewissern, ob Strasse frei */
do
{
sleep(3);
printf("Auto %d wartet auf freie Fahrt.\n", pos);
/* evtl Deadlock Entsperrung */
if (get_sem(semid, ANZAHL_AUTOS+1) == pos)
break;
}
while (get_sem(semid, (pos+1)%4) == 0 || get_sem(semid, ANZAHL_AUTOS) == 0);
/* claimen der entsprechenden Strassenabschnitte */
p(semid, ANZAHL_AUTOS);
/* Ueberqueren der Strasse */
state = FAHREN;
printf("Auto %d ueberquert die Strasse.\n", pos);
sleep(1);
/* Zuruecksetzen der Deadlock Sperre, falls noetig */
if (get_sem(semid, ANZAHL_AUTOS+1) == pos)
set_sem(semid, ANZAHL_AUTOS+1, ANZAHL_AUTOS);
/* Freigabe der entsprechenden Strassenabschnitte */
v(semid, pos);
v(semid, ANZAHL_AUTOS);
printf("Auto %d hat die Strasse ueberquert.\n", pos);
/* Zurueckkehren zur Kreuzung */
state = HERANFAHREN;
printf("Auto %d kehrt zur Kreuzung zurueck.\n", pos);
sleep(3);
}
}
static void rtl8139_tx_timeout(struct dev *dev) {
struct nic *tp = (struct nic *) dev->privdata;
long ioaddr = tp->iobase;
int status = inpw(ioaddr + IntrStatus);
int mii_reg;
unsigned int i;
kprintf("%s: Transmit timeout, status %2.2x %4.4x media %2.2x\n",
dev->name, inp(ioaddr + ChipCmd), status, inp(ioaddr + GPPinData));
if (status & (TxOK | RxOK)) {
kprintf("%s: RTL8139 Interrupt line blocked, status %x\n", dev->name, status);
}
// Disable interrupts by clearing the interrupt mask
outpw(ioaddr + IntrMask, 0x0000);
// Emit info to figure out what went wrong
kprintf("%s: Tx queue start entry %d dirty entry %d\n", dev->name, tp->cur_tx, tp->dirty_tx);
for (i = 0; i < NUM_TX_DESC; i++) {
kprintf("%s: Tx descriptor %d is %8.8x.%s\n",
dev->name, i, inpd(ioaddr + TxStatus0 + i*4),
i == tp->dirty_tx % NUM_TX_DESC ? " (queue head)" : "");
}
kprintf("%s: MII #%d registers are:", dev->name, tp->phys[0]);
for (mii_reg = 0; mii_reg < 8; mii_reg++) kprintf(" %4.4x", mdio_read(dev, tp->phys[0], mii_reg));
kprintf("\n");
// Dump the unsent Tx packets
for (i = 0; i < NUM_TX_DESC; i++) {
if (tp->tx_pbuf[i]) {
pbuf_free(tp->tx_pbuf[i]);
tp->tx_pbuf[i] = NULL;
tp->stats.tx_dropped++;
}
}
// Reset chip
rtl_hw_start(dev);
// Clear tx ring
tp->dirty_tx = tp->cur_tx = 0;
set_sem(&tp->tx_sem, NUM_TX_DESC);
}
int main(int argc,char *argv[])
{
int rate;
if(argv[1] != NULL) rate = atoi(argv[1]);
else rate = 3;
buff_key = 101;
buff_num = 3;
cget_key = 103;
cget_num = 1;
shm_flg = IPC_CREAT | 0644;
buff_ptr = (char *)set_shm(buff_key,buff_num,shm_flg);
cget_ptr = (int *)set_shm(cget_key,cget_num,shm_flg);
prod_key = 201;
cmtx_key = 203;
c_PG_key = 301;
c_TP_key = 302;
c_TG_key = 303;
sem_flg = IPC_CREAT | 0644;
sem_val = 1;
prod_sem = set_sem(prod_key,sem_val,sem_flg);
sem_val = 0;
c_PG_sem = set_sem(c_PG_key,sem_val,sem_flg);
c_TP_sem = set_sem(c_TP_key,sem_val,sem_flg);
c_TG_sem = set_sem(c_TG_key,sem_val,sem_flg);
sem_val = 1;
cmtx_sem = set_sem(cmtx_key,sem_val,sem_flg);
int pid1, pid2;
pid1 = fork();
if(pid1 == 0) {
while(1){
down(c_PG_sem);
down(cmtx_sem);
sleep(rate);
printf("%dsmoker has tobacco T, receive paper %c and glue %c, smoking……\n",
getpid(),buff_ptr[*cget_ptr + 1],buff_ptr[*cget_ptr + 2]);
up(cmtx_sem);
up(prod_sem);
}
} else {
pid2 = fork();
if(pid2 == 0) {
while(1){
down(c_TP_sem);
down(cmtx_sem);
sleep(rate);
printf("%d smoker has glue G,receive paper %c and tobacco %c, smoking……\n",
getpid(),buff_ptr[*cget_ptr + 1],buff_ptr[*cget_ptr]);
up(cmtx_sem);
up(prod_sem);
}
} else {
while(1){
down(c_TG_sem);
down(cmtx_sem);
sleep(rate);
printf("%d smoker has paper P, receive glue %c and tobacco %c, smoking…\n",
getpid(),buff_ptr[*cget_ptr + 2],buff_ptr[*cget_ptr]);
up(cmtx_sem);
up(prod_sem);
}
}
}
return EXIT_SUCCESS;
}
static int serial_ioctl(struct dev *dev, int cmd, void *args, size_t size) {
struct serial_port *sp = (struct serial_port *) dev->privdata;
struct serial_status *ss;
switch (cmd) {
case IOCTL_GETDEVSIZE:
return 0;
case IOCTL_GETBLKSIZE:
return 1;
case IOCTL_SERIAL_SETCONFIG:
if (!args || size != sizeof(struct serial_config)) return -EINVAL;
memcpy(&sp->cfg, args, sizeof(struct serial_config));
serial_config(sp);
return 0;
case IOCTL_SERIAL_GETCONFIG:
if (!args || size != sizeof(struct serial_config)) return -EINVAL;
memcpy(args, &sp->cfg, sizeof(struct serial_config));
return 0;
case IOCTL_SERIAL_WAITEVENT:
if (!args && size == 0) {
return wait_for_object(&sp->event, INFINITE);
} else if (args && size == 4) {
return wait_for_object(&sp->event, *(unsigned int *) args);
} else {
return -EINVAL;
}
case IOCTL_SERIAL_STAT:
if (!args || size != sizeof(struct serial_status)) return -EINVAL;
ss = (struct serial_status *) args;
ss->linestatus = sp->linestatus;
sp->linestatus = 0;
ss->modemstatus = inp((unsigned short) (sp->iobase + UART_MSR)) & 0xFF;
ss->rx_queue_size = sp->rxq.count;
ss->tx_queue_size = sp->txq.count;
return 0;
case IOCTL_SERIAL_DTR:
if (!args || size != 4) return -EINVAL;
if (*(int *) args) {
sp->mcr |= MCR_DTR;
} else {
sp->mcr &= ~MCR_DTR;
}
outp(sp->iobase + UART_MCR, sp->mcr);
return 0;
case IOCTL_SERIAL_RTS:
if (!args || size != 4) return -EINVAL;
if (*(int *) args) {
sp->mcr |= MCR_RTS;
} else {
sp->mcr &= ~MCR_RTS;
}
outp(sp->iobase + UART_MCR, sp->mcr);
return 0;
case IOCTL_SERIAL_FLUSH_TX_BUFFER:
cli();
fifo_clear(&sp->txq);
set_sem(&sp->tx_sem, QUEUE_SIZE);
sp->tx_queue_rel = 0;
if (sp->type == UART_16550A) outp(sp->iobase + UART_FCR, FCR_ENABLE | FCR_XMT_RST | FCR_TRIGGER_14);
sti();
return 0;
case IOCTL_SERIAL_FLUSH_RX_BUFFER:
cli();
fifo_clear(&sp->rxq);
set_sem(&sp->rx_sem, 0);
sp->rx_queue_rel = 0;
if (sp->type == UART_16550A) outp(sp->iobase + UART_FCR, FCR_ENABLE | FCR_RCV_RST | FCR_TRIGGER_14);
sti();
return 0;
}
return -ENOSYS;
}