/*
* comm_setselect
*
* This is a needed exported function which will be called to register
* and deregister interest in a pending IO state for a given FD.
*/
void
comm_setselect(fde_t *F, unsigned int type, PF *handler,
void *client_data, time_t timeout)
{
int new_events;
if ((type & COMM_SELECT_READ))
{
F->read_handler = handler;
F->read_data = client_data;
}
if ((type & COMM_SELECT_WRITE))
{
F->write_handler = handler;
F->write_data = client_data;
}
new_events = (F->read_handler ? POLLRDNORM : 0) |
(F->write_handler ? POLLWRNORM : 0);
if (timeout != 0)
F->timeout = CurrentTime + (timeout / 1000);
if (new_events != F->evcache)
{
if (new_events == 0)
{
pollfds[F->comm_index].fd = -1;
pollfds[F->comm_index].revents = 0;
if (pollmax == F->comm_index)
while (pollmax >= 0 && pollfds[pollmax].fd == -1)
pollmax--;
}
else
{
if (F->evcache == 0)
{
F->comm_index = poll_findslot();
if (F->comm_index > pollmax)
pollmax = F->comm_index;
pollfds[F->comm_index].fd = F->fd;
}
pollfds[F->comm_index].events = new_events;
pollfds[F->comm_index].revents = 0;
}
F->evcache = new_events;
}
}
/*
* set and clear entries in the pollfds[] array.
*/
static void poll_update_pollfds(int fd, short event, PF * handler)
{
fde_t *F = &fd_table[fd];
int comm_index;
if (F->comm_index < 0)
{
F->comm_index = poll_findslot();
}
comm_index = F->comm_index;
/* Update the events */
if (handler)
{
F->list = FDLIST_IDLECLIENT;
pollfd_list.pollfds[comm_index].events |= event;
pollfd_list.pollfds[comm_index].fd = fd;
/* update maxindex here */
if (comm_index > pollfd_list.maxindex)
pollfd_list.maxindex = comm_index;
} else
{
if (comm_index >= 0)
{
pollfd_list.pollfds[comm_index].events &= ~event;
if (pollfd_list.pollfds[comm_index].events == 0)
{
pollfd_list.pollfds[comm_index].fd = -1;
pollfd_list.pollfds[comm_index].revents = 0;
F->comm_index = -1;
F->list = FDLIST_NONE;
/* update pollfd_list.maxindex here */
if (comm_index == pollfd_list.maxindex)
{
while (pollfd_list.maxindex >= 0 &&
pollfd_list.pollfds[pollfd_list.maxindex].fd == -1)
pollfd_list.maxindex--;
}
}
}
}
}
