libev/ev_port.c

/*
 * libev solaris event port backend
 *
 * Copyright (c) 2007,2008,2009,2010 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;
  EV_TS_SET (ts, timeout);
  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)
          );

          fd_change (EV_A_ fd, EV__IOFDSET);
        }
    }

  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:	1.22
Committed:	Sat Oct 16 00:59:56 2010 UTC (13 years, 7 months ago) by root
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rel-4_01, rel-4_00, rel-4_02
Changes since 1.21:	+2 -2 lines
Log Message:	* empty log message *
#	User	Rev	Content
1	root	1.1	/*
2	root	1.6	* libev solaris event port backend
3			*
4	root	1.22	* Copyright (c) 2007,2008,2009,2010 Marc Alexander Lehmann <libev@schmorp.de>
5	root	1.6	* All rights reserved.
6	root	1.1	*
7	root	1.10	* 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	root	1.6	*
28	root	1.10	* 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	root	1.1	*/
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	root	1.9	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	root	1.12	ev_syserr ("(libev) port_associate");
63	root	1.9	}
64			}
65
66	root	1.1	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	root	1.5	port_dissociate (backend_fd, PORT_SOURCE_FD, fd);
76	root	1.1	}
77	root	1.9	else
78			port_associate_and_check (EV_A_ fd, nev);
79	root	1.1	}
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	root	1.16	EV_RELEASE_CB;
89	root	1.21	EV_TS_SET (ts, timeout);
90	root	1.5	res = port_getn (backend_fd, port_events, port_eventmax, &nget, &ts);
91	root	1.16	EV_ACQUIRE_CB;
92	root	1.1
93	root	1.13	if (res == -1)
94	root	1.1	{
95			if (errno != EINTR && errno != ETIME)
96	root	1.18	ev_syserr ("(libev) port_getn (see http://bugs.opensolaris.org/view_bug.do?bug_id=6268715, try LIBEV_FLAGS=3 env variable)");
97	root	1.1
98			return;
99			}
100
101			for (i = 0; i < nget; ++i)
102			{
103			if (port_events [i].portev_source == PORT_SOURCE_FD)
104			{
105			int fd = port_events [i].portev_object;
106
107			fd_event (
108			EV_A_
109			fd,
110			(port_events [i].portev_events & (POLLOUT \| POLLERR \| POLLHUP) ? EV_WRITE : 0)
111			\| (port_events [i].portev_events & (POLLIN \| POLLERR \| POLLHUP) ? EV_READ : 0)
112			);
113
114	root	1.22	fd_change (EV_A_ fd, EV__IOFDSET);
115	root	1.1	}
116			}
117
118			if (expect_false (nget == port_eventmax))
119			{
120			ev_free (port_events);
121	root	1.8	port_eventmax = array_nextsize (sizeof (port_event_t), port_eventmax, port_eventmax + 1);
122	root	1.1	port_events = (port_event_t )ev_malloc (sizeof (port_event_t) port_eventmax);
123			}
124			}
125
126	root	1.7	int inline_size
127	root	1.1	port_init (EV_P_ int flags)
128			{
129	sf-exg	1.19	/* Initialize the kernel queue */
130	root	1.5	if ((backend_fd = port_create ()) < 0)
131	root	1.1	return 0;
132
133	root	1.5	fcntl (backend_fd, F_SETFD, FD_CLOEXEC); /* not sure if necessary, hopefully doesn't hurt */
134	root	1.1
135	root	1.4	backend_fudge = 1e-3; /* needed to compensate for port_getn returning early */
136			backend_modify = port_modify;
137			backend_poll = port_poll;
138	root	1.1
139	sf-exg	1.19	port_eventmax = 64; /* initial number of events receivable per poll */
140	root	1.1	port_events = (port_event_t )ev_malloc (sizeof (port_event_t) port_eventmax);
141
142	root	1.3	return EVBACKEND_PORT;
143	root	1.1	}
144
145	root	1.7	void inline_size
146	root	1.1	port_destroy (EV_P)
147			{
148			ev_free (port_events);
149			}
150
151	root	1.7	void inline_size
152	root	1.1	port_fork (EV_P)
153			{
154	root	1.5	close (backend_fd);
155	root	1.1
156	root	1.5	while ((backend_fd = port_create ()) < 0)
157	root	1.12	ev_syserr ("(libev) port");
158	root	1.1
159	root	1.5	fcntl (backend_fd, F_SETFD, FD_CLOEXEC);
160	root	1.1
161			/* re-register interest in fds */
162			fd_rearm_all (EV_A);
163			}
164