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 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 | * |
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33 | * version of this file under the BSD license, indicate your decision |
33 | * version of this file under the BSD license, indicate your decision |
34 | * by deleting the provisions above and replace them with the notice |
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 |
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. |
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38 | */ |
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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) |
38 | */ |
49 | */ |
39 | |
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> |
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83 | { |
94 | { |
84 | int res, i; |
95 | int res, i; |
85 | struct timespec ts; |
96 | struct timespec ts; |
86 | uint_t nget = 1; |
97 | uint_t nget = 1; |
87 | |
98 | |
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99 | /* we initialise this to something we will skip in the loop, as */ |
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100 | /* port_getn can return with nget unchanged, but no indication */ |
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101 | /* whether it was the original value or has been updated :/ */ |
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102 | port_events [0].portev_source = 0; |
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103 | |
88 | EV_RELEASE_CB; |
104 | EV_RELEASE_CB; |
89 | EV_TS_SET (ts, timeout); |
105 | EV_TS_SET (ts, timeout); |
90 | res = port_getn (backend_fd, port_events, port_eventmax, &nget, &ts); |
106 | res = port_getn (backend_fd, port_events, port_eventmax, &nget, &ts); |
91 | EV_ACQUIRE_CB; |
107 | EV_ACQUIRE_CB; |
92 | |
108 | |
93 | if (res == -1) |
109 | /* port_getn may or may not set nget on error */ |
94 | { |
110 | /* so we rely on port_events [0].portev_source not being updated */ |
95 | if (errno != EINTR && errno != ETIME) |
111 | 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)"); |
112 | 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 | |
113 | |
101 | for (i = 0; i < nget; ++i) |
114 | for (i = 0; i < nget; ++i) |
102 | { |
115 | { |
103 | if (port_events [i].portev_source == PORT_SOURCE_FD) |
116 | if (port_events [i].portev_source == PORT_SOURCE_FD) |
104 | { |
117 | { |
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109 | fd, |
122 | fd, |
110 | (port_events [i].portev_events & (POLLOUT | POLLERR | POLLHUP) ? EV_WRITE : 0) |
123 | (port_events [i].portev_events & (POLLOUT | POLLERR | POLLHUP) ? EV_WRITE : 0) |
111 | | (port_events [i].portev_events & (POLLIN | POLLERR | POLLHUP) ? EV_READ : 0) |
124 | | (port_events [i].portev_events & (POLLIN | POLLERR | POLLHUP) ? EV_READ : 0) |
112 | ); |
125 | ); |
113 | |
126 | |
114 | port_associate_and_check (EV_A_ fd, anfds [fd].events); |
127 | fd_change (EV_A_ fd, EV__IOFDSET); |
115 | } |
128 | } |
116 | } |
129 | } |
117 | |
130 | |
118 | if (expect_false (nget == port_eventmax)) |
131 | if (expect_false (nget == port_eventmax)) |
119 | { |
132 | { |
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127 | port_init (EV_P_ int flags) |
140 | port_init (EV_P_ int flags) |
128 | { |
141 | { |
129 | /* Initialize the kernel queue */ |
142 | /* Initialize the kernel queue */ |
130 | if ((backend_fd = port_create ()) < 0) |
143 | if ((backend_fd = port_create ()) < 0) |
131 | return 0; |
144 | return 0; |
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145 | |
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146 | assert (("libev: PORT_SOURCE_FD must not be zero", PORT_SOURCE_FD)); |
132 | |
147 | |
133 | fcntl (backend_fd, F_SETFD, FD_CLOEXEC); /* not sure if necessary, hopefully doesn't hurt */ |
148 | fcntl (backend_fd, F_SETFD, FD_CLOEXEC); /* not sure if necessary, hopefully doesn't hurt */ |
134 | |
149 | |
135 | backend_fudge = 1e-3; /* needed to compensate for port_getn returning early */ |
150 | backend_fudge = 1e-3; /* needed to compensate for port_getn returning early */ |
136 | backend_modify = port_modify; |
151 | backend_modify = port_modify; |