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