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Comparing libev/ev_kqueue.c (file contents):
Revision 1.43 by root, Sat Mar 27 02:41:13 2010 UTC vs.
Revision 1.55 by root, Thu Jan 16 11:51:05 2014 UTC

1/* 1/*
2 * libev kqueue backend 2 * libev kqueue backend
3 * 3 *
4 * Copyright (c) 2007,2008,2009,2010 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007,2008,2009,2010,2011,2012,2013 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,
… …
95 kqueue_eventmax = array_nextsize (sizeof (struct kevent), kqueue_eventmax, kqueue_changecnt); 95 kqueue_eventmax = array_nextsize (sizeof (struct kevent), kqueue_eventmax, kqueue_changecnt);
96 kqueue_events = (struct kevent *)ev_malloc (sizeof (struct kevent) * kqueue_eventmax); 96 kqueue_events = (struct kevent *)ev_malloc (sizeof (struct kevent) * kqueue_eventmax);
97 } 97 }
98 98
99 EV_RELEASE_CB; 99 EV_RELEASE_CB;
100 ts.tv_sec = (time_t)timeout; 100 EV_TS_SET (ts, timeout);
101 ts.tv_nsec = (long)((timeout - (ev_tstamp)ts.tv_sec) * 1e9);
102 res = kevent (backend_fd, kqueue_changes, kqueue_changecnt, kqueue_events, kqueue_eventmax, &ts); 101 res = kevent (backend_fd, kqueue_changes, kqueue_changecnt, kqueue_events, kqueue_eventmax, &ts);
103 EV_ACQUIRE_CB; 102 EV_ACQUIRE_CB;
104 kqueue_changecnt = 0; 103 kqueue_changecnt = 0;
105 104
106 if (expect_false (res < 0)) 105 if (expect_false (res < 0))
107 { 106 {
108 if (errno != EINTR) 107 if (errno != EINTR)
109 ev_syserr ("(libev) kevent"); 108 ev_syserr ("(libev) kevent");
110 109
111 return; 110 return;
112 } 111 }
113 112
114 for (i = 0; i < res; ++i) 113 for (i = 0; i < res; ++i)
115 { 114 {
116 int fd = kqueue_events [i].ident; 115 int fd = kqueue_events [i].ident;
117 116
118 if (expect_false (kqueue_events [i].flags & EV_ERROR)) 117 if (expect_false (kqueue_events [i].flags & EV_ERROR))
119 { 118 {
120 int err = kqueue_events [i].data; 119 int err = kqueue_events [i].data;
121 120
122 /* we are only interested in errors for fds that we are interested in :) */ 121 /* we are only interested in errors for fds that we are interested in :) */
123 if (anfds [fd].events) 122 if (anfds [fd].events)
124 { 123 {
125 if (err == ENOENT) /* resubmit changes on ENOENT */ 124 if (err == ENOENT) /* resubmit changes on ENOENT */
126 kqueue_modify (EV_A_ fd, 0, anfds [fd].events); 125 kqueue_modify (EV_A_ fd, 0, anfds [fd].events);
127 else if (err == EBADF) /* on EBADF, we re-check the fd */ 126 else if (err == EBADF) /* on EBADF, we re-check the fd */
128 { 127 {
129 if (fd_valid (fd)) 128 if (fd_valid (fd))
… …
131 else 130 else
132 fd_kill (EV_A_ fd); 131 fd_kill (EV_A_ fd);
133 } 132 }
134 else /* on all other errors, we error out on the fd */ 133 else /* on all other errors, we error out on the fd */
135 fd_kill (EV_A_ fd); 134 fd_kill (EV_A_ fd);
136 } 135 }
137 } 136 }
138 else 137 else
139 fd_event ( 138 fd_event (
140 EV_A_ 139 EV_A_
141 fd, 140 fd,
… …
154} 153}
155 154
156int inline_size 155int inline_size
157kqueue_init (EV_P_ int flags) 156kqueue_init (EV_P_ int flags)
158{ 157{
159 /* Initalize the kernel queue */ 158 /* initialize the kernel queue */
159 kqueue_fd_pid = getpid ();
160 if ((backend_fd = kqueue ()) < 0) 160 if ((backend_fd = kqueue ()) < 0)
161 return 0; 161 return 0;
162 162
163 fcntl (backend_fd, F_SETFD, FD_CLOEXEC); /* not sure if necessary, hopefully doesn't hurt */ 163 fcntl (backend_fd, F_SETFD, FD_CLOEXEC); /* not sure if necessary, hopefully doesn't hurt */
164 164
165 backend_fudge = 0.; 165 backend_mintime = 1e-9; /* apparently, they did the right thing in freebsd */
166 backend_modify = kqueue_modify; 166 backend_modify = kqueue_modify;
167 backend_poll = kqueue_poll; 167 backend_poll = kqueue_poll;
168 168
169 kqueue_eventmax = 64; /* initial number of events receivable per poll */ 169 kqueue_eventmax = 64; /* initial number of events receivable per poll */
170 kqueue_events = (struct kevent *)ev_malloc (sizeof (struct kevent) * kqueue_eventmax); 170 kqueue_events = (struct kevent *)ev_malloc (sizeof (struct kevent) * kqueue_eventmax);
171 171
172 kqueue_changes = 0; 172 kqueue_changes = 0;
… …
184} 184}
185 185
186void inline_size 186void inline_size
187kqueue_fork (EV_P) 187kqueue_fork (EV_P)
188{ 188{
189 /* some BSD kernels don't just destroy the kqueue itself,
190 * but also close the fd, which isn't documented, and
191 * impossible to support properly.
192 * we remember the pid of the kqueue call and only close
193 * the fd if the pid is still the same.
194 * this leaks fds on sane kernels, but BSD interfaces are
195 * notoriously buggy and rarely get fixed.
196 */
197 pid_t newpid = getpid ();
198
199 if (newpid == kqueue_fd_pid)
189 close (backend_fd); 200 close (backend_fd);
190 201
202 kqueue_fd_pid = newpid;
191 while ((backend_fd = kqueue ()) < 0) 203 while ((backend_fd = kqueue ()) < 0)
192 ev_syserr ("(libev) kqueue"); 204 ev_syserr ("(libev) kqueue");
193 205
194 fcntl (backend_fd, F_SETFD, FD_CLOEXEC); 206 fcntl (backend_fd, F_SETFD, FD_CLOEXEC);
195 207
196 /* re-register interest in fds */ 208 /* re-register interest in fds */
197 fd_rearm_all (EV_A); 209 fd_rearm_all (EV_A);
198} 210}
199 211
212/* sys/event.h defines EV_ERROR */
213#undef EV_ERROR
214

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