int picoev_update_events_internal(picoev_loop* _loop, int fd, int events)
{
picoev_loop_kqueue* loop = (picoev_loop_kqueue*)_loop;
picoev_fd* target = picoev.fds + fd;
assert(PICOEV_FD_BELONGS_TO_LOOP(&loop->loop, fd));
/* initialize if adding the fd */
if ((events & PICOEV_ADD) != 0) {
target->_backend = -1;
}
/* return if nothing to do */
if (events == PICOEV_DEL
? target->_backend == -1
: (events & PICOEV_READWRITE) == target->events) {
return 0;
}
/* add to changed list if not yet being done */
if (target->_backend == -1) {
target->_backend = BACKEND_BUILD(loop->changed_fds, target->events);
loop->changed_fds = fd;
}
/* update events */
target->events = events & PICOEV_READWRITE;
/* apply immediately if is a DELETE */
if ((events & PICOEV_DEL) != 0) {
apply_pending_changes(loop, 1);
}
return 0;
}
int picoev_poll_once_internal(picoev_loop* _loop, int max_wait)
{
picoev_loop_kqueue* loop = (picoev_loop_kqueue*)_loop;
struct timespec ts;
int cl_off = 0, nevents, i;
/* apply pending changes, with last changes stored to loop->changelist */
cl_off = apply_pending_changes(loop, 0);
ts.tv_sec = max_wait;
ts.tv_nsec = 0;
nevents = kevent(loop->kq, loop->changelist, cl_off, loop->events,
sizeof(loop->events) / sizeof(loop->events[0]), &ts);
if (nevents == -1) {
/* the errors we can only rescue */
assert(errno == EACCES || errno == EFAULT || errno == EINTR);
return -1;
}
for (i = 0; i < nevents; ++i) {
struct kevent* event = loop->events + i;
picoev_fd* target = picoev.fds + event->ident;
assert((event->flags & EV_ERROR) == 0); /* changelist errors are fatal */
if (loop->loop.loop_id == target->loop_id
&& (event->flags & (EVFILT_READ | EVFILT_WRITE)) != 0) {
int revents = ((event->flags & EVFILT_READ) != 0 ? PICOEV_READ : 0)
| ((event->flags & EVFILT_WRITE) != 0 ? PICOEV_WRITE : 0);
(*target->callback)(&loop->loop, event->ident, revents,
target->cb_arg);
}
}
return 0;
}
int picoev_poll_once_internal(picoev_loop* _loop, int max_wait)
{
picoev_loop_kqueue* loop = (picoev_loop_kqueue*)_loop;
struct timespec ts;
int cl_off = 0, nevents, i;
/* apply pending changes, with last changes stored to loop->changelist */
cl_off = apply_pending_changes(loop, 0);
ts.tv_sec = max_wait;
ts.tv_nsec = 0;
Py_BEGIN_ALLOW_THREADS
nevents = kevent(loop->kq, loop->changelist, cl_off, loop->events,
sizeof(loop->events) / sizeof(loop->events[0]), &ts);
Py_END_ALLOW_THREADS
cache_time_update();
if (nevents == -1) {
/* the errors we can only rescue */
assert(errno == EACCES || errno == EFAULT || errno == EINTR);
return -1;
}
for (i = 0; i < nevents; ++i) {
struct kevent* event = loop->events + i;
picoev_fd* target = picoev.fds + event->ident;
assert((event->flags & EV_ERROR) == 0); /* changelist errors are fatal */
if (loop->loop.loop_id == target->loop_id
&& (event->filter & (EVFILT_READ | EVFILT_WRITE)) != 0) {
int revents;
switch (event->filter) {
case EVFILT_READ:
revents = PICOEV_READ;
break;
case EVFILT_WRITE:
revents = PICOEV_WRITE;
break;
default:
assert(0);
revents = 0; // suppress compiler warning
break;
}
(*target->callback)(&loop->loop, event->ident, revents, target->cb_arg);
}
}
return 0;
}
