static unsigned int p_poll(int index, struct file *filp, poll_table *wait)
{
unsigned int mask = 0;
pipe_file *pp = &(pipes[index]);
#ifdef KERNEL_PIPE
if(pipeType[index]>=PIPE_TYPE_KERNEL_THREAD)
return (POLLIN|POLLRDNORM);
#endif
poll_wait(filp, &(RQ(index)), wait);
if(pp->r_poll || dev_search(&(pp->device), pp->r_pos, (pp->device).head)){
if(pp->r_poll) pp->r_poll = 0;
mask |= POLLIN | POLLRDNORM; /* readable */
}
return mask;
}
void intHandler(void) {
unsigned int timeStamp = GET_TODLOW;
unsigned int prid = getPRID();
state_t *ints_oldarea;
pcb_t* current = getCurrentProcess(prid);
if(prid == 0)
ints_oldarea = (state_t *) INT_OLDAREA;
else
ints_oldarea = getNewOldAreaPtr(prid, INT_OLDAREA_INDEX);
// Aggiorno i tempi di esecuzione del processo
updateProcessExecTime(timeStamp, current);
// Aggiorno lo stato del processore nel pcb
updatePcbCPUState(ints_oldarea, current);
/* selezione del gestore per gli interrupt giusto */
if(CAUSE_IP_GET(ints_oldarea->cause, 1)) /* interrupt processor local timer */
{
pltIntHandler(current);
}
else if (CAUSE_IP_GET(ints_oldarea->cause, 2))
{
intervalIntHandler(ints_oldarea); /* interval timer interrupt */
}
else if (CAUSE_IP_GET(ints_oldarea->cause, 7)) /* int terminali */
{
unsigned int dBA = dev_search(devCalc(4));
/* calcolo se l'int è del sub-device trasmettitore, ricevitore o entrambi */
if (((*(memaddr *) dBA + 0x8) >= ILLEGAL_OPCODE) || ((*(memaddr *) dBA + 0x8) <= CHAR_TRASM))
IOIntHandler(dBA + 0x8, dBA + 0xc);
if (((*(memaddr *) dBA) >= ILLEGAL_OPCODE) || ((*(memaddr *) dBA) <= CHAR_RECV))
IOIntHandler(dBA, dBA + 0x4);
}
}