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/*
* Copyright 2007 Marc Alexander Lehmann <libev@schmorp.de>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/types.h>
#include <sys/time.h>
#include <poll.h>
#include <port.h>
#include <string.h>
#include <errno.h>
static void
port_modify (EV_P_ int fd, int oev, int nev)
{
/* we need to reassociate no matter what, as closes are
* once more silently being discarded.
*/
if (!nev)
{
if (oev)
port_dissociate (port_fd, PORT_SOURCE_FD, fd);
}
else if (0 >
port_associate (
port_fd, PORT_SOURCE_FD, fd,
(nev & EV_READ ? POLLIN : 0)
| (nev & EV_WRITE ? POLLOUT : 0),
0
)
)
{
if (errno == EBADFD)
fd_kill (EV_A_ fd);
else
syserr ("(libev) port_associate");
}
}
static void
port_poll (EV_P_ ev_tstamp timeout)
{
int res, i;
struct timespec ts;
uint_t nget = 1;
ts.tv_sec = (time_t)timeout;
ts.tv_nsec = (long)(timeout - (ev_tstamp)ts.tv_sec) * 1e9;
res = port_getn (port_fd, port_events, port_eventmax, &nget, &ts);
if (res < 0)
{
if (errno != EINTR && errno != ETIME)
syserr ("(libev) port_getn");
return;
}
for (i = 0; i < nget; ++i)
{
if (port_events [i].portev_source == PORT_SOURCE_FD)
{
int fd = port_events [i].portev_object;
fd_event (
EV_A_
fd,
(port_events [i].portev_events & (POLLOUT | POLLERR | POLLHUP) ? EV_WRITE : 0)
| (port_events [i].portev_events & (POLLIN | POLLERR | POLLHUP) ? EV_READ : 0)
);
anfds [fd].events = 0; /* event received == disassociated */
fd_change (EV_A_ fd); /* need to reify later */
}
}
if (expect_false (nget == port_eventmax))
{
ev_free (port_events);
port_eventmax = array_roundsize (port_event_t, port_eventmax << 1);
port_events = (port_event_t *)ev_malloc (sizeof (port_event_t) * port_eventmax);
}
}
static int
port_init (EV_P_ int flags)
{
/* Initalize the kernel queue */
if ((port_fd = port_create ()) < 0)
return 0;
fcntl (port_fd, F_SETFD, FD_CLOEXEC); /* not sure if necessary, hopefully doesn't hurt */
method_fudge = 1e-3; /* needed to compensate for port_getn returning early */
method_modify = port_modify;
method_poll = port_poll;
port_eventmax = 64; /* intiial number of events receivable per poll */
port_events = (port_event_t *)ev_malloc (sizeof (port_event_t) * port_eventmax);
return EVBACKEND_PORT;
}
static void
port_destroy (EV_P)
{
close (port_fd);
ev_free (port_events);
}
static void
port_fork (EV_P)
{
close (port_fd);
while ((port_fd = port_create ()) < 0)
syserr ("(libev) port");
fcntl (port_fd, F_SETFD, FD_CLOEXEC);
/* re-register interest in fds */
fd_rearm_all (EV_A);
}
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