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Comparing libev/ev_port.c (file contents):
Revision 1.14 by root, Thu Jul 9 09:11:20 2009 UTC vs.
Revision 1.23 by root, Mon Jan 10 13:53:49 2011 UTC

1/* 1/*
2 * libev solaris event port backend 2 * libev solaris event port backend
3 * 3 *
4 * Copyright (c) 2007,2008 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 *
… …
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.
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)
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>
… …
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 if (expect_false (suspend_cb)) suspend_cb (EV_A); 99 /* we initialise this to something we will skip in the loop, as */
89 ts.tv_sec = (time_t)timeout; 100 /* port_getn can return with nget unchanged, but no indication */
90 ts.tv_nsec = (long)(timeout - (ev_tstamp)ts.tv_sec) * 1e9; 101 /* whether it was the original value or has been updated :/ */
102 port_events [0].portev_source = 0;
103
104 EV_RELEASE_CB;
105 EV_TS_SET (ts, timeout);
91 res = port_getn (backend_fd, port_events, port_eventmax, &nget, &ts); 106 res = port_getn (backend_fd, port_events, port_eventmax, &nget, &ts);
92 if (expect_false (resume_cb)) resume_cb (EV_A); 107 EV_ACQUIRE_CB;
93 108
94 if (res == -1) 109 /* port_getn may or may not set nget on error */
95 { 110 /* so we rely on port_events [0].portev_source not being updated */
96 if (errno != EINTR && errno != ETIME) 111 if (res == -1 && errno != ETIME && errno != EINTR)
97 ev_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)");
98
99 return;
100 }
101 113
102 for (i = 0; i < nget; ++i) 114 for (i = 0; i < nget; ++i)
103 { 115 {
104 if (port_events [i].portev_source == PORT_SOURCE_FD) 116 if (port_events [i].portev_source == PORT_SOURCE_FD)
105 { 117 {
… …
110 fd, 122 fd,
111 (port_events [i].portev_events & (POLLOUT | POLLERR | POLLHUP) ? EV_WRITE : 0) 123 (port_events [i].portev_events & (POLLOUT | POLLERR | POLLHUP) ? EV_WRITE : 0)
112 | (port_events [i].portev_events & (POLLIN | POLLERR | POLLHUP) ? EV_READ : 0) 124 | (port_events [i].portev_events & (POLLIN | POLLERR | POLLHUP) ? EV_READ : 0)
113 ); 125 );
114 126
115 port_associate_and_check (EV_A_ fd, anfds [fd].events); 127 fd_change (EV_A_ fd, EV__IOFDSET);
116 } 128 }
117 } 129 }
118 130
119 if (expect_false (nget == port_eventmax)) 131 if (expect_false (nget == port_eventmax))
120 { 132 {
… …
125} 137}
126 138
127int inline_size 139int inline_size
128port_init (EV_P_ int flags) 140port_init (EV_P_ int flags)
129{ 141{
130 /* Initalize the kernel queue */ 142 /* Initialize the kernel queue */
131 if ((backend_fd = port_create ()) < 0) 143 if ((backend_fd = port_create ()) < 0)
132 return 0; 144 return 0;
145
146 assert (("libev: PORT_SOURCE_FD must not be zero"), PORT_SOURCE_FD);
133 147
134 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 */
135 149
136 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 */
137 backend_modify = port_modify; 151 backend_modify = port_modify;
138 backend_poll = port_poll; 152 backend_poll = port_poll;
139 153
140 port_eventmax = 64; /* intiial number of events receivable per poll */ 154 port_eventmax = 64; /* initial number of events receivable per poll */
141 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);
142 156
143 return EVBACKEND_PORT; 157 return EVBACKEND_PORT;
144} 158}
145 159

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