libev/ev_port.c

/*
 * libev solaris event port backend
 *
 * Copyright (c) 2007,2008,2009 Marc Alexander Lehmann <libev@schmorp.de>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modifica-
 * tion, 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 MER-
 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO
 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
 * CIAL, 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 OTH-
 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * Alternatively, the contents of this file may be used under the terms of
 * the GNU General Public License ("GPL") version 2 or any later version,
 * in which case the provisions of the GPL are applicable instead of
 * the above. If you wish to allow the use of your version of this file
 * only under the terms of the GPL and not to allow others to use your
 * version of this file under the BSD license, indicate your decision
 * by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL. If you do not delete the
 * provisions above, a recipient may use your version of this file under
 * either the BSD or the GPL.
 */

#include <sys/types.h>
#include <sys/time.h>
#include <poll.h>
#include <port.h>
#include <string.h>
#include <errno.h>

void inline_speed
port_associate_and_check (EV_P_ int fd, int ev)
{
  if (0 >
      port_associate (
         backend_fd, PORT_SOURCE_FD, fd,
         (ev & EV_READ ? POLLIN : 0)
         | (ev & EV_WRITE ? POLLOUT : 0),
         0
      )
  )
    {
      if (errno == EBADFD)
        fd_kill (EV_A_ fd);
      else
        ev_syserr ("(libev) port_associate");
    }
}

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 (backend_fd, PORT_SOURCE_FD, fd);
    }
  else
    port_associate_and_check (EV_A_ fd, nev);
}

static void
port_poll (EV_P_ ev_tstamp timeout)
{
  int res, i;
  struct timespec ts;
  uint_t nget = 1;

  EV_RELEASE_CB;
  ts.tv_sec  = (time_t)timeout;
  ts.tv_nsec = (long)(timeout - (ev_tstamp)ts.tv_sec) * 1e9;
  res = port_getn (backend_fd, port_events, port_eventmax, &nget, &ts);
  EV_ACQUIRE_CB;

  if (res == -1)
    { 
      if (errno != EINTR && errno != ETIME)
        ev_syserr ("(libev) port_getn (see http://bugs.opensolaris.org/view_bug.do?bug_id=6268715, try LIBEV_FLAGS=3 env variable)");

      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)
          );

          port_associate_and_check (EV_A_ fd, anfds [fd].events);
        }
    }

  if (expect_false (nget == port_eventmax))
    {
      ev_free (port_events);
      port_eventmax = array_nextsize (sizeof (port_event_t), port_eventmax, port_eventmax + 1);
      port_events = (port_event_t *)ev_malloc (sizeof (port_event_t) * port_eventmax);
    }
}

int inline_size
port_init (EV_P_ int flags)
{
  /* Initialize the kernel queue */
  if ((backend_fd = port_create ()) < 0)
    return 0;

  fcntl (backend_fd, F_SETFD, FD_CLOEXEC); /* not sure if necessary, hopefully doesn't hurt */

  backend_fudge  = 1e-3; /* needed to compensate for port_getn returning early */
  backend_modify = port_modify;
  backend_poll   = port_poll;

  port_eventmax = 64; /* initial number of events receivable per poll */
  port_events = (port_event_t *)ev_malloc (sizeof (port_event_t) * port_eventmax);

  return EVBACKEND_PORT;
}

void inline_size
port_destroy (EV_P)
{
  ev_free (port_events);
}

void inline_size
port_fork (EV_P)
{
  close (backend_fd);

  while ((backend_fd = port_create ()) < 0)
    ev_syserr ("(libev) port");

  fcntl (backend_fd, F_SETFD, FD_CLOEXEC);

  /* re-register interest in fds */
  fd_rearm_all (EV_A);
}

Revision:	1.19
Committed:	Sat Jul 31 23:00:11 2010 UTC (14 years, 1 month ago) by sf-exg
Content type:	text/plain
Branch:	MAIN
Changes since 1.18:	+2 -2 lines
Log Message:	Fix typos.
#	Content
1	/*
2	* libev solaris event port backend
3	*
4	* Copyright (c) 2007,2008,2009 Marc Alexander Lehmann <libev@schmorp.de>
5	* All rights reserved.
6	*
7	* Redistribution and use in source and binary forms, with or without modifica-
8	* tion, are permitted provided that the following conditions are met:
9	*
10	* 1. Redistributions of source code must retain the above copyright notice,
11	* this list of conditions and the following disclaimer.
12	*
13	* 2. Redistributions in binary form must reproduce the above copyright
14	* notice, this list of conditions and the following disclaimer in the
15	* documentation and/or other materials provided with the distribution.
16	*
17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
18	* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
19	* CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
20	* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
21	* CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
22	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
23	* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
24	* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
25	* ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
26	* OF THE POSSIBILITY OF SUCH DAMAGE.
27	*
28	* Alternatively, the contents of this file may be used under the terms of
29	* the GNU General Public License ("GPL") version 2 or any later version,
30	* in which case the provisions of the GPL are applicable instead of
31	* the above. If you wish to allow the use of your version of this file
32	* only under the terms of the GPL and not to allow others to use your
33	* version of this file under the BSD license, indicate your decision
34	* by deleting the provisions above and replace them with the notice
35	* and other provisions required by the GPL. If you do not delete the
36	* provisions above, a recipient may use your version of this file under
37	* either the BSD or the GPL.
38	*/
39
40	#include <sys/types.h>
41	#include <sys/time.h>
42	#include <poll.h>
43	#include <port.h>
44	#include <string.h>
45	#include <errno.h>
46
47	void inline_speed
48	port_associate_and_check (EV_P_ int fd, int ev)
49	{
50	if (0 >
51	port_associate (
52	backend_fd, PORT_SOURCE_FD, fd,
53	(ev & EV_READ ? POLLIN : 0)
54	\| (ev & EV_WRITE ? POLLOUT : 0),
55	0
56	)
57	)
58	{
59	if (errno == EBADFD)
60	fd_kill (EV_A_ fd);
61	else
62	ev_syserr ("(libev) port_associate");
63	}
64	}
65
66	static void
67	port_modify (EV_P_ int fd, int oev, int nev)
68	{
69	/* we need to reassociate no matter what, as closes are
70	* once more silently being discarded.
71	*/
72	if (!nev)
73	{
74	if (oev)
75	port_dissociate (backend_fd, PORT_SOURCE_FD, fd);
76	}
77	else
78	port_associate_and_check (EV_A_ fd, nev);
79	}
80
81	static void
82	port_poll (EV_P_ ev_tstamp timeout)
83	{
84	int res, i;
85	struct timespec ts;
86	uint_t nget = 1;
87
88	EV_RELEASE_CB;
89	ts.tv_sec = (time_t)timeout;
90	ts.tv_nsec = (long)(timeout - (ev_tstamp)ts.tv_sec) * 1e9;
91	res = port_getn (backend_fd, port_events, port_eventmax, &nget, &ts);
92	EV_ACQUIRE_CB;
93
94	if (res == -1)
95	{
96	if (errno != EINTR && errno != ETIME)
97	ev_syserr ("(libev) port_getn (see http://bugs.opensolaris.org/view_bug.do?bug_id=6268715, try LIBEV_FLAGS=3 env variable)");
98
99	return;
100	}
101
102	for (i = 0; i < nget; ++i)
103	{
104	if (port_events [i].portev_source == PORT_SOURCE_FD)
105	{
106	int fd = port_events [i].portev_object;
107
108	fd_event (
109	EV_A_
110	fd,
111	(port_events [i].portev_events & (POLLOUT \| POLLERR \| POLLHUP) ? EV_WRITE : 0)
112	\| (port_events [i].portev_events & (POLLIN \| POLLERR \| POLLHUP) ? EV_READ : 0)
113	);
114
115	port_associate_and_check (EV_A_ fd, anfds [fd].events);
116	}
117	}
118
119	if (expect_false (nget == port_eventmax))
120	{
121	ev_free (port_events);
122	port_eventmax = array_nextsize (sizeof (port_event_t), port_eventmax, port_eventmax + 1);
123	port_events = (port_event_t )ev_malloc (sizeof (port_event_t) port_eventmax);
124	}
125	}
126
127	int inline_size
128	port_init (EV_P_ int flags)
129	{
130	/* Initialize the kernel queue */
131	if ((backend_fd = port_create ()) < 0)
132	return 0;
133
134	fcntl (backend_fd, F_SETFD, FD_CLOEXEC); /* not sure if necessary, hopefully doesn't hurt */
135
136	backend_fudge = 1e-3; /* needed to compensate for port_getn returning early */
137	backend_modify = port_modify;
138	backend_poll = port_poll;
139
140	port_eventmax = 64; /* initial number of events receivable per poll */
141	port_events = (port_event_t )ev_malloc (sizeof (port_event_t) port_eventmax);
142
143	return EVBACKEND_PORT;
144	}
145
146	void inline_size
147	port_destroy (EV_P)
148	{
149	ev_free (port_events);
150	}
151
152	void inline_size
153	port_fork (EV_P)
154	{
155	close (backend_fd);
156
157	while ((backend_fd = port_create ()) < 0)
158	ev_syserr ("(libev) port");
159
160	fcntl (backend_fd, F_SETFD, FD_CLOEXEC);
161
162	/* re-register interest in fds */
163	fd_rearm_all (EV_A);
164	}
165