libev/ev_port.c

/*
 * libev solaris event port backend
 *
 * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *
 *     * 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 COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "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 COPYRIGHT
 * OWNER OR CONTRIBUTORS 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>

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
        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;

  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);

  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)
          );

          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)
{
  /* Initalize 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; /* intiial 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)
    syserr ("(libev) port");

  fcntl (backend_fd, F_SETFD, FD_CLOEXEC);

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

Revision:	1.9
Committed:	Fri Dec 14 18:04:31 2007 UTC (16 years, 5 months ago) by root
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rel-2_0, rel-1_86, rel-1_85
Changes since 1.8:	+22 -16 lines
Log Message:	fix solaris backend
#	User	Rev	Content
1	root	1.1	/*
2	root	1.6	* libev solaris event port backend
3			*
4			* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
5			* All rights reserved.
6	root	1.1	*
7			* Redistribution and use in source and binary forms, with or without
8	root	1.6	* modification, are permitted provided that the following conditions are
9			* met:
10			*
11			* * Redistributions of source code must retain the above copyright
12			* notice, this list of conditions and the following disclaimer.
13	root	1.1	*
14	root	1.6	* * Redistributions in binary form must reproduce the above
15			* copyright notice, this list of conditions and the following
16			* disclaimer in the documentation and/or other materials provided
17			* with the distribution.
18	root	1.1	*
19	root	1.6	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20			* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21			* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22			* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23			* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24			* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25			* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26	root	1.1	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27			* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28	root	1.6	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29			* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30	root	1.1	*/
31
32			#include <sys/types.h>
33			#include <sys/time.h>
34			#include <poll.h>
35			#include <port.h>
36			#include <string.h>
37			#include <errno.h>
38
39	root	1.9	void inline_speed
40			port_associate_and_check (EV_P_ int fd, int ev)
41			{
42			if (0 >
43			port_associate (
44			backend_fd, PORT_SOURCE_FD, fd,
45			(ev & EV_READ ? POLLIN : 0)
46			\| (ev & EV_WRITE ? POLLOUT : 0),
47			0
48			)
49			)
50			{
51			if (errno == EBADFD)
52			fd_kill (EV_A_ fd);
53			else
54			syserr ("(libev) port_associate");
55			}
56			}
57
58	root	1.1	static void
59			port_modify (EV_P_ int fd, int oev, int nev)
60			{
61			/* we need to reassociate no matter what, as closes are
62			* once more silently being discarded.
63			*/
64			if (!nev)
65			{
66			if (oev)
67	root	1.5	port_dissociate (backend_fd, PORT_SOURCE_FD, fd);
68	root	1.1	}
69	root	1.9	else
70			port_associate_and_check (EV_A_ fd, nev);
71	root	1.1	}
72
73			static void
74			port_poll (EV_P_ ev_tstamp timeout)
75			{
76			int res, i;
77			struct timespec ts;
78			uint_t nget = 1;
79
80			ts.tv_sec = (time_t)timeout;
81			ts.tv_nsec = (long)(timeout - (ev_tstamp)ts.tv_sec) * 1e9;
82	root	1.5	res = port_getn (backend_fd, port_events, port_eventmax, &nget, &ts);
83	root	1.1
84			if (res < 0)
85			{
86			if (errno != EINTR && errno != ETIME)
87			syserr ("(libev) port_getn");
88
89			return;
90			}
91
92			for (i = 0; i < nget; ++i)
93			{
94			if (port_events [i].portev_source == PORT_SOURCE_FD)
95			{
96			int fd = port_events [i].portev_object;
97
98			fd_event (
99			EV_A_
100			fd,
101			(port_events [i].portev_events & (POLLOUT \| POLLERR \| POLLHUP) ? EV_WRITE : 0)
102			\| (port_events [i].portev_events & (POLLIN \| POLLERR \| POLLHUP) ? EV_READ : 0)
103			);
104
105	root	1.9	port_associate_and_check (EV_A_ fd, anfds [fd].events);
106	root	1.1	}
107			}
108
109			if (expect_false (nget == port_eventmax))
110			{
111			ev_free (port_events);
112	root	1.8	port_eventmax = array_nextsize (sizeof (port_event_t), port_eventmax, port_eventmax + 1);
113	root	1.1	port_events = (port_event_t )ev_malloc (sizeof (port_event_t) port_eventmax);
114			}
115			}
116
117	root	1.7	int inline_size
118	root	1.1	port_init (EV_P_ int flags)
119			{
120			/* Initalize the kernel queue */
121	root	1.5	if ((backend_fd = port_create ()) < 0)
122	root	1.1	return 0;
123
124	root	1.5	fcntl (backend_fd, F_SETFD, FD_CLOEXEC); /* not sure if necessary, hopefully doesn't hurt */
125	root	1.1
126	root	1.4	backend_fudge = 1e-3; /* needed to compensate for port_getn returning early */
127			backend_modify = port_modify;
128			backend_poll = port_poll;
129	root	1.1
130			port_eventmax = 64; /* intiial number of events receivable per poll */
131			port_events = (port_event_t )ev_malloc (sizeof (port_event_t) port_eventmax);
132
133	root	1.3	return EVBACKEND_PORT;
134	root	1.1	}
135
136	root	1.7	void inline_size
137	root	1.1	port_destroy (EV_P)
138			{
139			ev_free (port_events);
140			}
141
142	root	1.7	void inline_size
143	root	1.1	port_fork (EV_P)
144			{
145	root	1.5	close (backend_fd);
146	root	1.1
147	root	1.5	while ((backend_fd = port_create ()) < 0)
148	root	1.1	syserr ("(libev) port");
149
150	root	1.5	fcntl (backend_fd, F_SETFD, FD_CLOEXEC);
151	root	1.1
152			/* re-register interest in fds */
153			fd_rearm_all (EV_A);
154			}
155