1 | /* |
1 | /* |
2 | * libev solaris event port backend |
2 | * libev solaris event port backend |
3 | * |
3 | * |
4 | * Copyright (c) 2007,2008,2009 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 modifica- |
7 | * Redistribution and use in source and binary forms, with or without modifica- |
8 | * tion, are permitted provided that the following conditions are met: |
8 | * tion, are permitted provided that the following conditions are met: |
9 | * |
9 | * |
10 | * 1. Redistributions of source code must retain the above copyright notice, |
10 | * 1. Redistributions of source code must retain the above copyright notice, |
11 | * this list of conditions and the following disclaimer. |
11 | * this list of conditions and the following disclaimer. |
12 | * |
12 | * |
13 | * 2. Redistributions in binary form must reproduce the above copyright |
13 | * 2. Redistributions in binary form must reproduce the above copyright |
14 | * notice, this list of conditions and the following disclaimer in the |
14 | * notice, this list of conditions and the following disclaimer in the |
15 | * documentation and/or other materials provided with the distribution. |
15 | * documentation and/or other materials provided with the distribution. |
16 | * |
16 | * |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED |
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- |
18 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER- |
19 | * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO |
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- |
20 | * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE- |
21 | * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
21 | * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
… | |
… | |
35 | * and other provisions required by the GPL. If you do not delete the |
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 |
36 | * provisions above, a recipient may use your version of this file under |
37 | * either the BSD or the GPL. |
37 | * either the BSD or the GPL. |
38 | */ |
38 | */ |
39 | |
39 | |
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40 | /* useful reading: |
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41 | * |
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42 | * http://bugs.opensolaris.org/view_bug.do?bug_id=6268715 (random results) |
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43 | * http://bugs.opensolaris.org/view_bug.do?bug_id=6455223 (just totally broken) |
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44 | * http://bugs.opensolaris.org/view_bug.do?bug_id=6873782 (manpage ETIME) |
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45 | * http://bugs.opensolaris.org/view_bug.do?bug_id=6874410 (implementation ETIME) |
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46 | * http://www.mail-archive.com/networking-discuss@opensolaris.org/msg11898.html ETIME vs. nget |
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47 | * http://src.opensolaris.org/source/xref/onnv/onnv-gate/usr/src/lib/libc/port/gen/event_port.c (libc) |
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48 | * http://cvs.opensolaris.org/source/xref/onnv/onnv-gate/usr/src/uts/common/fs/portfs/port.c#1325 (kernel) |
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49 | */ |
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50 | |
40 | #include <sys/types.h> |
51 | #include <sys/types.h> |
41 | #include <sys/time.h> |
52 | #include <sys/time.h> |
42 | #include <poll.h> |
53 | #include <poll.h> |
43 | #include <port.h> |
54 | #include <port.h> |
44 | #include <string.h> |
55 | #include <string.h> |
45 | #include <errno.h> |
56 | #include <errno.h> |
46 | |
57 | |
47 | void inline_speed |
58 | inline_speed |
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59 | void |
48 | port_associate_and_check (EV_P_ int fd, int ev) |
60 | port_associate_and_check (EV_P_ int fd, int ev) |
49 | { |
61 | { |
50 | if (0 > |
62 | if (0 > |
51 | port_associate ( |
63 | port_associate ( |
52 | backend_fd, PORT_SOURCE_FD, fd, |
64 | backend_fd, PORT_SOURCE_FD, fd, |
… | |
… | |
55 | 0 |
67 | 0 |
56 | ) |
68 | ) |
57 | ) |
69 | ) |
58 | { |
70 | { |
59 | if (errno == EBADFD) |
71 | if (errno == EBADFD) |
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72 | { |
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73 | assert (("libev: port_associate found invalid fd", errno != EBADFD); |
60 | fd_kill (EV_A_ fd); |
74 | fd_kill (EV_A_ fd); |
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75 | } |
61 | else |
76 | else |
62 | ev_syserr ("(libev) port_associate"); |
77 | ev_syserr ("(libev) port_associate"); |
63 | } |
78 | } |
64 | } |
79 | } |
65 | |
80 | |
… | |
… | |
83 | { |
98 | { |
84 | int res, i; |
99 | int res, i; |
85 | struct timespec ts; |
100 | struct timespec ts; |
86 | uint_t nget = 1; |
101 | uint_t nget = 1; |
87 | |
102 | |
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103 | /* we initialise this to something we will skip in the loop, as */ |
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104 | /* port_getn can return with nget unchanged, but no indication */ |
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105 | /* whether it was the original value or has been updated :/ */ |
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106 | port_events [0].portev_source = 0; |
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107 | |
88 | EV_RELEASE_CB; |
108 | EV_RELEASE_CB; |
89 | EV_TS_SET (ts, timeout); |
109 | EV_TS_SET (ts, timeout); |
90 | res = port_getn (backend_fd, port_events, port_eventmax, &nget, &ts); |
110 | res = port_getn (backend_fd, port_events, port_eventmax, &nget, &ts); |
91 | EV_ACQUIRE_CB; |
111 | EV_ACQUIRE_CB; |
92 | |
112 | |
93 | if (res == -1) |
113 | /* port_getn may or may not set nget on error */ |
94 | { |
114 | /* so we rely on port_events [0].portev_source not being updated */ |
95 | if (errno != EINTR && errno != ETIME) |
115 | if (res == -1 && errno != ETIME && errno != EINTR) |
96 | ev_syserr ("(libev) port_getn (see http://bugs.opensolaris.org/view_bug.do?bug_id=6268715, try LIBEV_FLAGS=3 env variable)"); |
116 | ev_syserr ("(libev) port_getn (see http://bugs.opensolaris.org/view_bug.do?bug_id=6268715, try LIBEV_FLAGS=3 env variable)"); |
97 | |
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98 | return; |
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99 | } |
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100 | |
117 | |
101 | for (i = 0; i < nget; ++i) |
118 | for (i = 0; i < nget; ++i) |
102 | { |
119 | { |
103 | if (port_events [i].portev_source == PORT_SOURCE_FD) |
120 | if (port_events [i].portev_source == PORT_SOURCE_FD) |
104 | { |
121 | { |
… | |
… | |
109 | fd, |
126 | fd, |
110 | (port_events [i].portev_events & (POLLOUT | POLLERR | POLLHUP) ? EV_WRITE : 0) |
127 | (port_events [i].portev_events & (POLLOUT | POLLERR | POLLHUP) ? EV_WRITE : 0) |
111 | | (port_events [i].portev_events & (POLLIN | POLLERR | POLLHUP) ? EV_READ : 0) |
128 | | (port_events [i].portev_events & (POLLIN | POLLERR | POLLHUP) ? EV_READ : 0) |
112 | ); |
129 | ); |
113 | |
130 | |
114 | port_associate_and_check (EV_A_ fd, anfds [fd].events); |
131 | fd_change (EV_A_ fd, EV__IOFDSET); |
115 | } |
132 | } |
116 | } |
133 | } |
117 | |
134 | |
118 | if (expect_false (nget == port_eventmax)) |
135 | if (ecb_expect_false (nget == port_eventmax)) |
119 | { |
136 | { |
120 | ev_free (port_events); |
137 | ev_free (port_events); |
121 | 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); |
122 | 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); |
123 | } |
140 | } |
124 | } |
141 | } |
125 | |
142 | |
126 | int inline_size |
143 | inline_size |
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144 | int |
127 | port_init (EV_P_ int flags) |
145 | port_init (EV_P_ int flags) |
128 | { |
146 | { |
129 | /* Initialize the kernel queue */ |
147 | /* Initialize the kernel queue */ |
130 | if ((backend_fd = port_create ()) < 0) |
148 | if ((backend_fd = port_create ()) < 0) |
131 | return 0; |
149 | return 0; |
132 | |
150 | |
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151 | assert (("libev: PORT_SOURCE_FD must not be zero", PORT_SOURCE_FD)); |
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152 | |
133 | 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 */ |
134 | |
154 | |
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155 | /* if my reading of the opensolaris kernel sources are correct, then |
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156 | * opensolaris does something very stupid: it checks if the time has already |
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157 | * elapsed and doesn't round up if that is the case,m otherwise it DOES round |
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158 | * up. Since we can't know what the case is, we need to guess by using a |
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159 | * "large enough" timeout. Normally, 1e-9 would be correct. |
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160 | */ |
135 | 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 */ |
136 | backend_modify = port_modify; |
162 | backend_modify = port_modify; |
137 | backend_poll = port_poll; |
163 | backend_poll = port_poll; |
138 | |
164 | |
139 | port_eventmax = 64; /* initial number of events receivable per poll */ |
165 | port_eventmax = 64; /* initial number of events receivable per poll */ |
140 | 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); |
141 | |
167 | |
142 | return EVBACKEND_PORT; |
168 | return EVBACKEND_PORT; |
143 | } |
169 | } |
144 | |
170 | |
145 | void inline_size |
171 | inline_size |
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172 | void |
146 | port_destroy (EV_P) |
173 | port_destroy (EV_P) |
147 | { |
174 | { |
148 | ev_free (port_events); |
175 | ev_free (port_events); |
149 | } |
176 | } |
150 | |
177 | |
151 | void inline_size |
178 | inline_size |
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179 | void |
152 | port_fork (EV_P) |
180 | port_fork (EV_P) |
153 | { |
181 | { |
154 | close (backend_fd); |
182 | close (backend_fd); |
155 | |
183 | |
156 | while ((backend_fd = port_create ()) < 0) |
184 | while ((backend_fd = port_create ()) < 0) |