{
struct kevent *ke;
- array_needsize (kqueue_changes, kqueue_changemax, ++kqueue_changecnt, );
-
- ke = &kqueue_changes [kqueue_changecnt - 1];
- memset (ke, 0, sizeof (struct kevent));
- ke->ident = fd;
- ke->filter = filter;
- ke->flags = flags;
- ke->fflags = fflags;
+ ++kqueue_changecnt;
+ array_needsize (struct kevent, kqueue_changes, kqueue_changemax, kqueue_changecnt, EMPTY2);
+
+ EV_SET (&kqueue_changes [kqueue_changecnt - 1], fd, filter, flags, fflags, 0, 0);
}
#ifndef NOTE_EOF
static void
kqueue_modify (EV_P_ int fd, int oev, int nev)
{
- if ((oev ^ nev) & EV_READ)
+ if (oev != nev)
{
- if (nev & EV_READ)
- kqueue_change (fd, EVFILT_READ, EV_ADD, NOTE_EOF);
- else
- kqueue_change (fd, EVFILT_READ, EV_DELETE, 0);
- }
+ if (oev & EV_READ)
+ kqueue_change (EV_A_ fd, EVFILT_READ , EV_DELETE, 0);
- if ((oev ^ nev) & EV_WRITE)
- {
- if (nev & EV_WRITE)
- kqueue_change (fd, EVFILT_WRITE, EV_ADD, NOTE_EOF);
- else
- kqueue_change (fd, EVFILT_WRITE, EV_DELETE, 0);
+ if (oev & EV_WRITE)
+ kqueue_change (EV_A_ fd, EVFILT_WRITE, EV_DELETE, 0);
}
+
+ /* to detect close/reopen reliably, we have to re-add */
+ /* event requests even when oev == nev */
+
+ if (nev & EV_READ)
+ kqueue_change (EV_A_ fd, EVFILT_READ , EV_ADD, NOTE_EOF);
+
+ if (nev & EV_WRITE)
+ kqueue_change (EV_A_ fd, EVFILT_WRITE, EV_ADD, NOTE_EOF);
}
static void
int res, i;
struct timespec ts;
+ /* need to resize so there is enough space for errors */
+ if (kqueue_changecnt > kqueue_eventmax)
+ {
+ ev_free (kqueue_events);
+ kqueue_eventmax = array_roundsize (struct kevent, kqueue_changecnt);
+ kqueue_events = (struct kevent *)ev_malloc (sizeof (struct kevent) * kqueue_eventmax);
+ }
+
ts.tv_sec = (time_t)timeout;
- ts.tv_nsec = (long)(timeout - (ev_tstamp)ts.tv_sec) * 1e9;
- res = kevent (kqueue_fd, kqueue_changes, kqueue_changecnt, kqueue_events, kqueue_eventmax, &ts);
+ ts.tv_nsec = (long)((timeout - (ev_tstamp)ts.tv_sec) * 1e9);
+ res = kevent (backend_fd, kqueue_changes, kqueue_changecnt, kqueue_events, kqueue_eventmax, &ts);
kqueue_changecnt = 0;
if (res < 0)
- return;
+ {
+ if (errno != EINTR)
+ syserr ("(libev) kevent");
+
+ return;
+ }
for (i = 0; i < res; ++i)
{
- if (kqueue_events [i].flags & EV_ERROR)
+ int fd = kqueue_events [i].ident;
+
+ if (expect_false (kqueue_events [i].flags & EV_ERROR))
{
+ int err = kqueue_events [i].data;
+
/*
- * Error messages that can happen, when a delete fails.
+ * errors that may happen
* EBADF happens when the file discriptor has been
* closed,
- * ENOENT when the file discriptor was closed and
+ * ENOENT when the file descriptor was closed and
* then reopened.
* EINVAL for some reasons not understood; EINVAL
* should not be returned ever; but FreeBSD does :-\
- * An error is also indicated when a callback deletes
- * an event we are still processing. In that case
- * the data field is set to ENOENT.
*/
- if (kqueue_events [i].data == EBADF)
- fd_kill (EV_A_ kqueue_events [i].ident);
+
+ /* we are only interested in errors for fds that we are interested in :) */
+ if (anfds [fd].events)
+ {
+ if (err == ENOENT) /* resubmit changes on ENOENT */
+ kqueue_modify (EV_A_ fd, 0, anfds [fd].events);
+ else if (err == EBADF) /* on EBADF, we re-check the fd */
+ {
+ if (fd_valid (fd))
+ kqueue_modify (EV_A_ fd, 0, anfds [fd].events);
+ else
+ fd_kill (EV_A_ fd);
+ }
+ else /* on all other errors, we error out on the fd */
+ fd_kill (EV_A_ fd);
+ }
}
else
fd_event (
EV_A_
- kqueue_events [i].ident,
+ fd,
kqueue_events [i].filter == EVFILT_READ ? EV_READ
: kqueue_events [i].filter == EVFILT_WRITE ? EV_WRITE
: 0
if (expect_false (res == kqueue_eventmax))
{
- free (kqueue_events);
- kqueue_eventmax = array_roundsize (kqueue_events, kqueue_eventmax << 1);
- kqueue_events = malloc (sizeof (struct kevent) * kqueue_eventmax);
+ ev_free (kqueue_events);
+ kqueue_eventmax = array_roundsize (struct kevent, kqueue_eventmax << 1);
+ kqueue_events = (struct kevent *)ev_malloc (sizeof (struct kevent) * kqueue_eventmax);
}
}
struct kevent ch, ev;
/* Initalize the kernel queue */
- if ((kqueue_fd = kqueue ()) < 0)
+ if ((backend_fd = kqueue ()) < 0)
return 0;
- fcntl (kqueue_fd, F_SETFD, FD_CLOEXEC); /* not sure if necessary, hopefully doesn't hurt */
+ fcntl (backend_fd, F_SETFD, FD_CLOEXEC); /* not sure if necessary, hopefully doesn't hurt */
/* Check for Mac OS X kqueue bug. */
ch.ident = -1;
* stick an error in ev. If kqueue is broken, then
* kevent will fail.
*/
- if (kevent (kqueue_fd, &ch, 1, &ev, 1, 0) != 1
+ if (kevent (backend_fd, &ch, 1, &ev, 1, 0) != 1
|| ev.ident != -1
|| ev.flags != EV_ERROR)
{
/* detected broken kqueue */
- close (kqueue_fd);
+ close (backend_fd);
return 0;
}
- method_fudge = 1e-3; /* needed to compensate for kevent returning early */
- method_modify = kqueue_modify;
- method_poll = kqueue_poll;
+ backend_fudge = 1e-3; /* needed to compensate for kevent returning early */
+ backend_modify = kqueue_modify;
+ backend_poll = kqueue_poll;
kqueue_eventmax = 64; /* intiial number of events receivable per poll */
- kqueue_events = malloc (sizeof (struct kevent) * kqueue_eventmax);
+ kqueue_events = (struct kevent *)ev_malloc (sizeof (struct kevent) * kqueue_eventmax);
kqueue_changes = 0;
kqueue_changemax = 0;
kqueue_changecnt = 0;
- return EVMETHOD_KQUEUE;
+ return EVBACKEND_KQUEUE;
}
static void
kqueue_destroy (EV_P)
{
- close (kqueue_fd);
+ close (backend_fd);
- free (kqueue_events);
- free (kqueue_changes);
+ ev_free (kqueue_events);
+ ev_free (kqueue_changes);
}
static void
kqueue_fork (EV_P)
{
- kqueue_fd = kqueue ();
- fcntl (kqueue_fd, F_SETFD, FD_CLOEXEC);
+ close (backend_fd);
+
+ while ((backend_fd = kqueue ()) < 0)
+ syserr ("(libev) kqueue");
+
+ fcntl (backend_fd, F_SETFD, FD_CLOEXEC);
/* re-register interest in fds */
fd_rearm_all (EV_A);
projects / software / libev.git / blobdiff