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Comparing libev/ev_port.c (file contents):
Revision 1.9 by root, Fri Dec 14 18:04:31 2007 UTC vs.
Revision 1.32 by root, Sun Jul 7 06:00:32 2019 UTC

1/* 1/*
2 * libev solaris event port backend 2 * libev solaris event port backend
3 * 3 *
4 * Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007,2008,2009,2010,2011,2019 Marc Alexander Lehmann <libev@schmorp.de>
5 * All rights reserved. 5 * All rights reserved.
6 * 6 *
7 * Redistribution and use in source and binary forms, with or without 7 * Redistribution and use in source and binary forms, with or without modifica-
8 * modification, are permitted provided that the following conditions are 8 * tion, are permitted provided that the following conditions are met:
9 * met:
10 * 9 *
11 * * Redistributions of source code must retain the above copyright 10 * 1. Redistributions of source code must retain the above copyright notice,
12 * notice, this list of conditions and the following disclaimer. 11 * this list of conditions and the following disclaimer.
13 * 12 *
14 * * Redistributions in binary form must reproduce the above 13 * 2. Redistributions in binary form must reproduce the above copyright
15 * copyright notice, this list of conditions and the following 14 * notice, this list of conditions and the following disclaimer in the
16 * disclaimer in the documentation and/or other materials provided 15 * documentation and/or other materials provided with the distribution.
17 * with the distribution.
18 * 16 *
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH-
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 25 * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 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/* useful reading:
41 *
42 * http://bugs.opensolaris.org/view_bug.do?bug_id=6268715 (random results)
43 * http://bugs.opensolaris.org/view_bug.do?bug_id=6455223 (just totally broken)
44 * http://bugs.opensolaris.org/view_bug.do?bug_id=6873782 (manpage ETIME)
45 * http://bugs.opensolaris.org/view_bug.do?bug_id=6874410 (implementation ETIME)
46 * http://www.mail-archive.com/networking-discuss@opensolaris.org/msg11898.html ETIME vs. nget
47 * http://src.opensolaris.org/source/xref/onnv/onnv-gate/usr/src/lib/libc/port/gen/event_port.c (libc)
48 * http://cvs.opensolaris.org/source/xref/onnv/onnv-gate/usr/src/uts/common/fs/portfs/port.c#1325 (kernel)
30 */ 49 */
31 50
32#include <sys/types.h> 51#include <sys/types.h>
33#include <sys/time.h> 52#include <sys/time.h>
34#include <poll.h> 53#include <poll.h>
35#include <port.h> 54#include <port.h>
36#include <string.h> 55#include <string.h>
37#include <errno.h> 56#include <errno.h>
38 57
39void inline_speed 58inline_speed
59void
40port_associate_and_check (EV_P_ int fd, int ev) 60port_associate_and_check (EV_P_ int fd, int ev)
41{ 61{
42 if (0 > 62 if (0 >
43 port_associate ( 63 port_associate (
44 backend_fd, PORT_SOURCE_FD, fd, 64 backend_fd, PORT_SOURCE_FD, fd,
… …
47 0 67 0
48 ) 68 )
49 ) 69 )
50 { 70 {
51 if (errno == EBADFD) 71 if (errno == EBADFD)
72 {
73 assert (("libev: port_associate found invalid fd", errno != EBADFD);
52 fd_kill (EV_A_ fd); 74 fd_kill (EV_A_ fd);
75 }
53 else 76 else
54 syserr ("(libev) port_associate"); 77 ev_syserr ("(libev) port_associate");
55 } 78 }
56} 79}
57 80
58static void 81static void
59port_modify (EV_P_ int fd, int oev, int nev) 82port_modify (EV_P_ int fd, int oev, int nev)
… …
75{ 98{
76 int res, i; 99 int res, i;
77 struct timespec ts; 100 struct timespec ts;
78 uint_t nget = 1; 101 uint_t nget = 1;
79 102
80 ts.tv_sec = (time_t)timeout; 103 /* we initialise this to something we will skip in the loop, as */
81 ts.tv_nsec = (long)(timeout - (ev_tstamp)ts.tv_sec) * 1e9; 104 /* port_getn can return with nget unchanged, but no indication */
105 /* whether it was the original value or has been updated :/ */
106 port_events [0].portev_source = 0;
107
108 EV_RELEASE_CB;
109 EV_TS_SET (ts, timeout);
82 res = port_getn (backend_fd, port_events, port_eventmax, &nget, &ts); 110 res = port_getn (backend_fd, port_events, port_eventmax, &nget, &ts);
111 EV_ACQUIRE_CB;
83 112
84 if (res < 0) 113 /* port_getn may or may not set nget on error */
85 { 114 /* so we rely on port_events [0].portev_source not being updated */
86 if (errno != EINTR && errno != ETIME) 115 if (res == -1 && errno != ETIME && errno != EINTR)
87 syserr ("(libev) port_getn"); 116 ev_syserr ("(libev) port_getn (see http://bugs.opensolaris.org/view_bug.do?bug_id=6268715, try LIBEV_FLAGS=3 env variable)");
88
89 return;
90 }
91 117
92 for (i = 0; i < nget; ++i) 118 for (i = 0; i < nget; ++i)
93 { 119 {
94 if (port_events [i].portev_source == PORT_SOURCE_FD) 120 if (port_events [i].portev_source == PORT_SOURCE_FD)
95 { 121 {
… …
100 fd, 126 fd,
101 (port_events [i].portev_events & (POLLOUT | POLLERR | POLLHUP) ? EV_WRITE : 0) 127 (port_events [i].portev_events & (POLLOUT | POLLERR | POLLHUP) ? EV_WRITE : 0)
102 | (port_events [i].portev_events & (POLLIN | POLLERR | POLLHUP) ? EV_READ : 0) 128 | (port_events [i].portev_events & (POLLIN | POLLERR | POLLHUP) ? EV_READ : 0)
103 ); 129 );
104 130
105 port_associate_and_check (EV_A_ fd, anfds [fd].events); 131 fd_change (EV_A_ fd, EV__IOFDSET);
106 } 132 }
107 } 133 }
108 134
109 if (expect_false (nget == port_eventmax)) 135 if (ecb_expect_false (nget == port_eventmax))
110 { 136 {
111 ev_free (port_events); 137 ev_free (port_events);
112 port_eventmax = array_nextsize (sizeof (port_event_t), port_eventmax, port_eventmax + 1); 138 port_eventmax = array_nextsize (sizeof (port_event_t), port_eventmax, port_eventmax + 1);
113 port_events = (port_event_t *)ev_malloc (sizeof (port_event_t) * port_eventmax); 139 port_events = (port_event_t *)ev_malloc (sizeof (port_event_t) * port_eventmax);
114 } 140 }
115} 141}
116 142
117int inline_size 143inline_size
144int
118port_init (EV_P_ int flags) 145port_init (EV_P_ int flags)
119{ 146{
120 /* Initalize the kernel queue */ 147 /* Initialize the kernel queue */
121 if ((backend_fd = port_create ()) < 0) 148 if ((backend_fd = port_create ()) < 0)
122 return 0; 149 return 0;
123 150
151 assert (("libev: PORT_SOURCE_FD must not be zero", PORT_SOURCE_FD));
152
124 fcntl (backend_fd, F_SETFD, FD_CLOEXEC); /* not sure if necessary, hopefully doesn't hurt */ 153 fcntl (backend_fd, F_SETFD, FD_CLOEXEC); /* not sure if necessary, hopefully doesn't hurt */
125 154
155 /* if my reading of the opensolaris kernel sources are correct, then
156 * opensolaris does something very stupid: it checks if the time has already
157 * elapsed and doesn't round up if that is the case, otherwise it DOES round
158 * up. Since we can't know what the case is, we need to guess by using a
159 * "large enough" timeout. Normally, 1e-9 would be correct.
160 */
126 backend_fudge = 1e-3; /* needed to compensate for port_getn returning early */ 161 backend_mintime = 1e-3; /* needed to compensate for port_getn returning early */
127 backend_modify = port_modify; 162 backend_modify = port_modify;
128 backend_poll = port_poll; 163 backend_poll = port_poll;
129 164
130 port_eventmax = 64; /* intiial number of events receivable per poll */ 165 port_eventmax = 64; /* initial number of events receivable per poll */
131 port_events = (port_event_t *)ev_malloc (sizeof (port_event_t) * port_eventmax); 166 port_events = (port_event_t *)ev_malloc (sizeof (port_event_t) * port_eventmax);
132 167
133 return EVBACKEND_PORT; 168 return EVBACKEND_PORT;
134} 169}
135 170
136void inline_size 171inline_size
172void
137port_destroy (EV_P) 173port_destroy (EV_P)
138{ 174{
139 ev_free (port_events); 175 ev_free (port_events);
140} 176}
141 177
142void inline_size 178inline_size
179void
143port_fork (EV_P) 180port_fork (EV_P)
144{ 181{
145 close (backend_fd); 182 close (backend_fd);
146 183
147 while ((backend_fd = port_create ()) < 0) 184 while ((backend_fd = port_create ()) < 0)
148 syserr ("(libev) port"); 185 ev_syserr ("(libev) port");
149 186
150 fcntl (backend_fd, F_SETFD, FD_CLOEXEC); 187 fcntl (backend_fd, F_SETFD, FD_CLOEXEC);
151 188
152 /* re-register interest in fds */ 189 /* re-register interest in fds */
153 fd_rearm_all (EV_A); 190 fd_rearm_all (EV_A);

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