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Comparing libev/ev_kqueue.c (file contents):
Revision 1.51 by root, Sat Jun 4 05:33:29 2011 UTC vs.
Revision 1.58 by root, Sat Jun 22 22:18:39 2019 UTC

1/* 1/*
2 * libev kqueue backend 2 * libev kqueue backend
3 * 3 *
4 * Copyright (c) 2007,2008,2009,2010,2011 Marc Alexander Lehmann <libev@schmorp.de> 4 * Copyright (c) 2007,2008,2009,2010,2011,2012,2013,2016,2019 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 *
… …
41#include <sys/time.h> 41#include <sys/time.h>
42#include <sys/event.h> 42#include <sys/event.h>
43#include <string.h> 43#include <string.h>
44#include <errno.h> 44#include <errno.h>
45 45
46void inline_speed 46inline_speed
47void
47kqueue_change (EV_P_ int fd, int filter, int flags, int fflags) 48kqueue_change (EV_P_ int fd, int filter, int flags, int fflags)
48{ 49{
49 ++kqueue_changecnt; 50 ++kqueue_changecnt;
50 array_needsize (struct kevent, kqueue_changes, kqueue_changemax, kqueue_changecnt, EMPTY2); 51 array_needsize (struct kevent, kqueue_changes, kqueue_changemax, kqueue_changecnt, array_needsize_noinit);
51 52
52 EV_SET (&kqueue_changes [kqueue_changecnt - 1], fd, filter, flags, fflags, 0, 0); 53 EV_SET (&kqueue_changes [kqueue_changecnt - 1], fd, filter, flags, fflags, 0, 0);
53} 54}
54 55
55/* OS X at least needs this */ 56/* OS X at least needs this */
… …
103 kqueue_changecnt = 0; 104 kqueue_changecnt = 0;
104 105
105 if (expect_false (res < 0)) 106 if (expect_false (res < 0))
106 { 107 {
107 if (errno != EINTR) 108 if (errno != EINTR)
108 ev_syserr ("(libev) kevent"); 109 ev_syserr ("(libev) kqueue kevent");
109 110
110 return; 111 return;
111 } 112 }
112 113
113 for (i = 0; i < res; ++i) 114 for (i = 0; i < res; ++i)
… …
150 kqueue_eventmax = array_nextsize (sizeof (struct kevent), kqueue_eventmax, kqueue_eventmax + 1); 151 kqueue_eventmax = array_nextsize (sizeof (struct kevent), kqueue_eventmax, kqueue_eventmax + 1);
151 kqueue_events = (struct kevent *)ev_malloc (sizeof (struct kevent) * kqueue_eventmax); 152 kqueue_events = (struct kevent *)ev_malloc (sizeof (struct kevent) * kqueue_eventmax);
152 } 153 }
153} 154}
154 155
155int inline_size 156inline_size
157int
156kqueue_init (EV_P_ int flags) 158kqueue_init (EV_P_ int flags)
157{ 159{
158 /* Initialize the kernel queue */ 160 /* initialize the kernel queue */
161 kqueue_fd_pid = getpid ();
159 if ((backend_fd = kqueue ()) < 0) 162 if ((backend_fd = kqueue ()) < 0)
160 return 0; 163 return 0;
161 164
162 fcntl (backend_fd, F_SETFD, FD_CLOEXEC); /* not sure if necessary, hopefully doesn't hurt */ 165 fcntl (backend_fd, F_SETFD, FD_CLOEXEC); /* not sure if necessary, hopefully doesn't hurt */
163 166
… …
173 kqueue_changecnt = 0; 176 kqueue_changecnt = 0;
174 177
175 return EVBACKEND_KQUEUE; 178 return EVBACKEND_KQUEUE;
176} 179}
177 180
178void inline_size 181inline_size
182void
179kqueue_destroy (EV_P) 183kqueue_destroy (EV_P)
180{ 184{
181 ev_free (kqueue_events); 185 ev_free (kqueue_events);
182 ev_free (kqueue_changes); 186 ev_free (kqueue_changes);
183} 187}
184 188
185void inline_size 189inline_size
190void
186kqueue_fork (EV_P) 191kqueue_fork (EV_P)
187{ 192{
193 /* some BSD kernels don't just destroy the kqueue itself,
194 * but also close the fd, which isn't documented, and
195 * impossible to support properly.
196 * we remember the pid of the kqueue call and only close
197 * the fd if the pid is still the same.
198 * this leaks fds on sane kernels, but BSD interfaces are
199 * notoriously buggy and rarely get fixed.
200 */
201 pid_t newpid = getpid ();
202
203 if (newpid == kqueue_fd_pid)
188 close (backend_fd); 204 close (backend_fd);
189 205
206 kqueue_fd_pid = newpid;
190 while ((backend_fd = kqueue ()) < 0) 207 while ((backend_fd = kqueue ()) < 0)
191 ev_syserr ("(libev) kqueue"); 208 ev_syserr ("(libev) kqueue");
192 209
193 fcntl (backend_fd, F_SETFD, FD_CLOEXEC); 210 fcntl (backend_fd, F_SETFD, FD_CLOEXEC);
194 211
195 /* re-register interest in fds */ 212 /* re-register interest in fds */
196 fd_rearm_all (EV_A); 213 fd_rearm_all (EV_A);
197} 214}
198 215
216/* sys/event.h defines EV_ERROR */
217#undef EV_ERROR
218

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