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Comparing libev/ev_kqueue.c (file contents):
Revision 1.48 by root, Wed Feb 16 08:02:50 2011 UTC vs.
Revision 1.60 by root, Mon Jul 1 20:47:38 2019 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) 2007,2008,2009,2010,2011,2012,2013,2016,2019 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 */
… …
100 EV_TS_SET (ts, timeout); 101 EV_TS_SET (ts, timeout);
101 res = kevent (backend_fd, kqueue_changes, kqueue_changecnt, kqueue_events, kqueue_eventmax, &ts); 102 res = kevent (backend_fd, kqueue_changes, kqueue_changecnt, kqueue_events, kqueue_eventmax, &ts);
102 EV_ACQUIRE_CB; 103 EV_ACQUIRE_CB;
103 kqueue_changecnt = 0; 104 kqueue_changecnt = 0;
104 105
105 if (expect_false (res < 0)) 106 if (ecb_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)
114 { 115 {
115 int fd = kqueue_events [i].ident; 116 int fd = kqueue_events [i].ident;
116 117
117 if (expect_false (kqueue_events [i].flags & EV_ERROR)) 118 if (ecb_expect_false (kqueue_events [i].flags & EV_ERROR))
118 { 119 {
119 int err = kqueue_events [i].data; 120 int err = kqueue_events [i].data;
120 121
121 /* we are only interested in errors for fds that we are interested in :) */ 122 /* we are only interested in errors for fds that we are interested in :) */
122 if (anfds [fd].events) 123 if (anfds [fd].events)
… …
126 else if (err == EBADF) /* on EBADF, we re-check the fd */ 127 else if (err == EBADF) /* on EBADF, we re-check the fd */
127 { 128 {
128 if (fd_valid (fd)) 129 if (fd_valid (fd))
129 kqueue_modify (EV_A_ fd, 0, anfds [fd].events); 130 kqueue_modify (EV_A_ fd, 0, anfds [fd].events);
130 else 131 else
132 {
133 assert (("libev: kqueue found invalid fd", 0));
131 fd_kill (EV_A_ fd); 134 fd_kill (EV_A_ fd);
135 }
132 } 136 }
133 else /* on all other errors, we error out on the fd */ 137 else /* on all other errors, we error out on the fd */
138 {
139 assert (("libev: kqueue found invalid fd", 0));
134 fd_kill (EV_A_ fd); 140 fd_kill (EV_A_ fd);
141 }
135 } 142 }
136 } 143 }
137 else 144 else
138 fd_event ( 145 fd_event (
139 EV_A_ 146 EV_A_
… …
142 : kqueue_events [i].filter == EVFILT_WRITE ? EV_WRITE 149 : kqueue_events [i].filter == EVFILT_WRITE ? EV_WRITE
143 : 0 150 : 0
144 ); 151 );
145 } 152 }
146 153
147 if (expect_false (res == kqueue_eventmax)) 154 if (ecb_expect_false (res == kqueue_eventmax))
148 { 155 {
149 ev_free (kqueue_events); 156 ev_free (kqueue_events);
150 kqueue_eventmax = array_nextsize (sizeof (struct kevent), kqueue_eventmax, kqueue_eventmax + 1); 157 kqueue_eventmax = array_nextsize (sizeof (struct kevent), kqueue_eventmax, kqueue_eventmax + 1);
151 kqueue_events = (struct kevent *)ev_malloc (sizeof (struct kevent) * kqueue_eventmax); 158 kqueue_events = (struct kevent *)ev_malloc (sizeof (struct kevent) * kqueue_eventmax);
152 } 159 }
153} 160}
154 161
155int inline_size 162inline_size
163int
156kqueue_init (EV_P_ int flags) 164kqueue_init (EV_P_ int flags)
157{ 165{
158 /* Initialize the kernel queue */ 166 /* initialize the kernel queue */
167 kqueue_fd_pid = getpid ();
159 if ((backend_fd = kqueue ()) < 0) 168 if ((backend_fd = kqueue ()) < 0)
160 return 0; 169 return 0;
161 170
162 fcntl (backend_fd, F_SETFD, FD_CLOEXEC); /* not sure if necessary, hopefully doesn't hurt */ 171 fcntl (backend_fd, F_SETFD, FD_CLOEXEC); /* not sure if necessary, hopefully doesn't hurt */
163 172
164 backend_fudge = 0.; 173 backend_mintime = 1e-9; /* apparently, they did the right thing in freebsd */
165 backend_modify = kqueue_modify; 174 backend_modify = kqueue_modify;
166 backend_poll = kqueue_poll; 175 backend_poll = kqueue_poll;
167 176
168 kqueue_eventmax = 64; /* initial number of events receivable per poll */ 177 kqueue_eventmax = 64; /* initial number of events receivable per poll */
169 kqueue_events = (struct kevent *)ev_malloc (sizeof (struct kevent) * kqueue_eventmax); 178 kqueue_events = (struct kevent *)ev_malloc (sizeof (struct kevent) * kqueue_eventmax);
170 179
171 kqueue_changes = 0; 180 kqueue_changes = 0;
… …
173 kqueue_changecnt = 0; 182 kqueue_changecnt = 0;
174 183
175 return EVBACKEND_KQUEUE; 184 return EVBACKEND_KQUEUE;
176} 185}
177 186
178void inline_size 187inline_size
188void
179kqueue_destroy (EV_P) 189kqueue_destroy (EV_P)
180{ 190{
181 ev_free (kqueue_events); 191 ev_free (kqueue_events);
182 ev_free (kqueue_changes); 192 ev_free (kqueue_changes);
183} 193}
184 194
185void inline_size 195inline_size
196void
186kqueue_fork (EV_P) 197kqueue_fork (EV_P)
187{ 198{
199 /* some BSD kernels don't just destroy the kqueue itself,
200 * but also close the fd, which isn't documented, and
201 * impossible to support properly.
202 * we remember the pid of the kqueue call and only close
203 * the fd if the pid is still the same.
204 * this leaks fds on sane kernels, but BSD interfaces are
205 * notoriously buggy and rarely get fixed.
206 */
207 pid_t newpid = getpid ();
208
209 if (newpid == kqueue_fd_pid)
188 close (backend_fd); 210 close (backend_fd);
189 211
212 kqueue_fd_pid = newpid;
190 while ((backend_fd = kqueue ()) < 0) 213 while ((backend_fd = kqueue ()) < 0)
191 ev_syserr ("(libev) kqueue"); 214 ev_syserr ("(libev) kqueue");
192 215
193 fcntl (backend_fd, F_SETFD, FD_CLOEXEC); 216 fcntl (backend_fd, F_SETFD, FD_CLOEXEC);
194 217
195 /* re-register interest in fds */ 218 /* re-register interest in fds */
196 fd_rearm_all (EV_A); 219 fd_rearm_all (EV_A);
197} 220}
198 221
222/* sys/event.h defines EV_ERROR */
223#undef EV_ERROR
224

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