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/cvs/libev/ev_port.c
Revision: 1.13
Committed: Fri Nov 21 02:10:34 2008 UTC (15 years, 7 months ago) by root
Content type: text/plain
Branch: MAIN
CVS Tags: rel-3_51, rel-3_53, rel-3_52, rel-3_6
Changes since 1.12: +1 -1 lines
Log Message:
*** empty log message ***

File Contents

# Content
1 /*
2 * libev solaris event port backend
3 *
4 * Copyright (c) 2007,2008 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 ts.tv_sec = (time_t)timeout;
89 ts.tv_nsec = (long)(timeout - (ev_tstamp)ts.tv_sec) * 1e9;
90 res = port_getn (backend_fd, port_events, port_eventmax, &nget, &ts);
91
92 if (res == -1)
93 {
94 if (errno != EINTR && errno != ETIME)
95 ev_syserr ("(libev) port_getn");
96
97 return;
98 }
99
100 for (i = 0; i < nget; ++i)
101 {
102 if (port_events [i].portev_source == PORT_SOURCE_FD)
103 {
104 int fd = port_events [i].portev_object;
105
106 fd_event (
107 EV_A_
108 fd,
109 (port_events [i].portev_events & (POLLOUT | POLLERR | POLLHUP) ? EV_WRITE : 0)
110 | (port_events [i].portev_events & (POLLIN | POLLERR | POLLHUP) ? EV_READ : 0)
111 );
112
113 port_associate_and_check (EV_A_ fd, anfds [fd].events);
114 }
115 }
116
117 if (expect_false (nget == port_eventmax))
118 {
119 ev_free (port_events);
120 port_eventmax = array_nextsize (sizeof (port_event_t), port_eventmax, port_eventmax + 1);
121 port_events = (port_event_t *)ev_malloc (sizeof (port_event_t) * port_eventmax);
122 }
123 }
124
125 int inline_size
126 port_init (EV_P_ int flags)
127 {
128 /* Initalize the kernel queue */
129 if ((backend_fd = port_create ()) < 0)
130 return 0;
131
132 fcntl (backend_fd, F_SETFD, FD_CLOEXEC); /* not sure if necessary, hopefully doesn't hurt */
133
134 backend_fudge = 1e-3; /* needed to compensate for port_getn returning early */
135 backend_modify = port_modify;
136 backend_poll = port_poll;
137
138 port_eventmax = 64; /* intiial number of events receivable per poll */
139 port_events = (port_event_t *)ev_malloc (sizeof (port_event_t) * port_eventmax);
140
141 return EVBACKEND_PORT;
142 }
143
144 void inline_size
145 port_destroy (EV_P)
146 {
147 ev_free (port_events);
148 }
149
150 void inline_size
151 port_fork (EV_P)
152 {
153 close (backend_fd);
154
155 while ((backend_fd = port_create ()) < 0)
156 ev_syserr ("(libev) port");
157
158 fcntl (backend_fd, F_SETFD, FD_CLOEXEC);
159
160 /* re-register interest in fds */
161 fd_rearm_all (EV_A);
162 }
163