static unsigned fd_set_popcount(fd_set *set, unsigned n)
{
unsigned count = 0, i;
for (i = 0; i < __FDELT(n); i++)
if (set->fds_bits[i])
count += hweight_long(set->fds_bits[i]);
if (i < __FDSET_LONGS && (set->fds_bits[i] & (__FDMASK(n) - 1)))
count += hweight_long(set->fds_bits[i] & (__FDMASK(n) - 1));
return count;
}
static void fd_set_zerofill(fd_set *set, unsigned n)
{
unsigned i;
i = __FDELT(n);
if (i < __FDSET_LONGS)
set->fds_bits[i] &= (__FDMASK(n) - 1);
for(i++; i < __FDSET_LONGS; i++)
set->fds_bits[i] = 0;
}
static unsigned
fd_set_and(fd_set *result, fd_set *first, fd_set *second, unsigned n)
{
unsigned i, not_empty = 0;
for (i = 0; i < __FDELT(n); i++)
if((result->fds_bits[i] =
first->fds_bits[i] & second->fds_bits[i]))
not_empty = 1;
if (i < __FDSET_LONGS
&& (result->fds_bits[i] =
first->fds_bits[i] & second->fds_bits[i] & (__FDMASK(n) - 1)))
not_empty = 1;
return not_empty;
}
int SelectorAddHandler(
Selector* self,
Handler* handler)
{
if (self->nhandlers == MAX_HANDLERS)
return -1;
#if defined(CHECK_DUPLICATE_ADDS)
if (_FindHandler(self, handler) != (size_t)-1)
return -1;
#endif
#if defined(USE_FDSET_INTERNALS)
handler->__fdelt = __FDELT(handler->sock);
handler->__fdmask = __FDMASK(handler->sock);
#endif
self->handlers[self->nhandlers++] = handler;
DEBUG_ASSERT(_FindHandler(self, handler) != (size_t)-1);
return 0;
}
