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 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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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> |
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57 | ) |
68 | ) |
58 | { |
69 | { |
59 | if (errno == EBADFD) |
70 | if (errno == EBADFD) |
60 | fd_kill (EV_A_ fd); |
71 | fd_kill (EV_A_ fd); |
61 | else |
72 | else |
62 | syserr ("(libev) port_associate"); |
73 | ev_syserr ("(libev) port_associate"); |
63 | } |
74 | } |
64 | } |
75 | } |
65 | |
76 | |
66 | static void |
77 | static void |
67 | port_modify (EV_P_ int fd, int oev, int nev) |
78 | port_modify (EV_P_ int fd, int oev, int nev) |
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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 | |
88 | ts.tv_sec = (time_t)timeout; |
99 | /* we initialise this to something we will skip in the loop, as */ |
89 | ts.tv_nsec = (long)(timeout - (ev_tstamp)ts.tv_sec) * 1e9; |
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 | |
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104 | EV_RELEASE_CB; |
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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); |
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107 | EV_ACQUIRE_CB; |
91 | |
108 | |
92 | if (res < 0) |
109 | /* port_getn may or may not set nget on error */ |
93 | { |
110 | /* so we rely on port_events [0].portev_source not being updated */ |
94 | if (errno != EINTR && errno != ETIME) |
111 | if (res == -1 && errno != ETIME && errno != EINTR) |
95 | syserr ("(libev) port_getn"); |
112 | ev_syserr ("(libev) port_getn (see http://bugs.opensolaris.org/view_bug.do?bug_id=6268715, try LIBEV_FLAGS=3 env variable)"); |
96 | |
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97 | return; |
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98 | } |
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99 | |
113 | |
100 | for (i = 0; i < nget; ++i) |
114 | for (i = 0; i < nget; ++i) |
101 | { |
115 | { |
102 | if (port_events [i].portev_source == PORT_SOURCE_FD) |
116 | if (port_events [i].portev_source == PORT_SOURCE_FD) |
103 | { |
117 | { |
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108 | fd, |
122 | fd, |
109 | (port_events [i].portev_events & (POLLOUT | POLLERR | POLLHUP) ? EV_WRITE : 0) |
123 | (port_events [i].portev_events & (POLLOUT | POLLERR | POLLHUP) ? EV_WRITE : 0) |
110 | | (port_events [i].portev_events & (POLLIN | POLLERR | POLLHUP) ? EV_READ : 0) |
124 | | (port_events [i].portev_events & (POLLIN | POLLERR | POLLHUP) ? EV_READ : 0) |
111 | ); |
125 | ); |
112 | |
126 | |
113 | port_associate_and_check (EV_A_ fd, anfds [fd].events); |
127 | fd_change (EV_A_ fd, EV__IOFDSET); |
114 | } |
128 | } |
115 | } |
129 | } |
116 | |
130 | |
117 | if (expect_false (nget == port_eventmax)) |
131 | if (expect_false (nget == port_eventmax)) |
118 | { |
132 | { |
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123 | } |
137 | } |
124 | |
138 | |
125 | int inline_size |
139 | int inline_size |
126 | port_init (EV_P_ int flags) |
140 | port_init (EV_P_ int flags) |
127 | { |
141 | { |
128 | /* Initalize the kernel queue */ |
142 | /* Initialize the kernel queue */ |
129 | if ((backend_fd = port_create ()) < 0) |
143 | if ((backend_fd = port_create ()) < 0) |
130 | 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)); |
131 | |
147 | |
132 | 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 */ |
133 | |
149 | |
134 | 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 */ |
135 | backend_modify = port_modify; |
151 | backend_modify = port_modify; |
136 | backend_poll = port_poll; |
152 | backend_poll = port_poll; |
137 | |
153 | |
138 | port_eventmax = 64; /* intiial number of events receivable per poll */ |
154 | port_eventmax = 64; /* initial number of events receivable per poll */ |
139 | port_events = (port_event_t *)ev_malloc (sizeof (port_event_t) * port_eventmax); |
155 | port_events = (port_event_t *)ev_malloc (sizeof (port_event_t) * port_eventmax); |
140 | |
156 | |
141 | return EVBACKEND_PORT; |
157 | return EVBACKEND_PORT; |
142 | } |
158 | } |
143 | |
159 | |
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151 | port_fork (EV_P) |
167 | port_fork (EV_P) |
152 | { |
168 | { |
153 | close (backend_fd); |
169 | close (backend_fd); |
154 | |
170 | |
155 | while ((backend_fd = port_create ()) < 0) |
171 | while ((backend_fd = port_create ()) < 0) |
156 | syserr ("(libev) port"); |
172 | ev_syserr ("(libev) port"); |
157 | |
173 | |
158 | fcntl (backend_fd, F_SETFD, FD_CLOEXEC); |
174 | fcntl (backend_fd, F_SETFD, FD_CLOEXEC); |
159 | |
175 | |
160 | /* re-register interest in fds */ |
176 | /* re-register interest in fds */ |
161 | fd_rearm_all (EV_A); |
177 | fd_rearm_all (EV_A); |