Marc Alexander Lehmann
14 years ago
6 changed files with 189 additions and 7 deletions
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README.embed
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ev.c
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ev.h
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ev_port.c
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| @ -0,0 +1,147 @@ | |||
| /* | |||
| * 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. | |||
| * 3. The name of the author may not be used to endorse or promote products | |||
| * derived from this software without specific prior written permission. | |||
| * | |||
| * 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 EVMETHOD_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); | |||
| } | |||