| 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 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 | EV_SET_TV (tv, timeout); |
100 | EV_TS_SET (ts, timeout); |
| 101 | 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); |
| 102 | EV_ACQUIRE_CB; |
102 | EV_ACQUIRE_CB; |
| 103 | kqueue_changecnt = 0; |
103 | kqueue_changecnt = 0; |
| 104 | |
104 | |
| 105 | if (expect_false (res < 0)) |
105 | if (expect_false (res < 0)) |
| 106 | { |
106 | { |
| 107 | if (errno != EINTR) |
107 | if (errno != EINTR) |
| 108 | ev_syserr ("(libev) kevent"); |
108 | ev_syserr ("(libev) kevent"); |
| 109 | |
109 | |
| 110 | return; |
110 | return; |
| 111 | } |
111 | } |
| 112 | |
112 | |
| 113 | for (i = 0; i < res; ++i) |
113 | for (i = 0; i < res; ++i) |
| 114 | { |
114 | { |
| 115 | int fd = kqueue_events [i].ident; |
115 | int fd = kqueue_events [i].ident; |
| 116 | |
116 | |
| … | |
… | |
| 159 | if ((backend_fd = kqueue ()) < 0) |
159 | if ((backend_fd = kqueue ()) < 0) |
| 160 | return 0; |
160 | return 0; |
| 161 | |
161 | |
| 162 | fcntl (backend_fd, F_SETFD, FD_CLOEXEC); /* not sure if necessary, hopefully doesn't hurt */ |
162 | fcntl (backend_fd, F_SETFD, FD_CLOEXEC); /* not sure if necessary, hopefully doesn't hurt */ |
| 163 | |
163 | |
| 164 | backend_fudge = 0.; |
164 | backend_mintime = 1e-9; /* apparently, they did the right thing in freebsd */ |
| 165 | backend_modify = kqueue_modify; |
165 | backend_modify = kqueue_modify; |
| 166 | backend_poll = kqueue_poll; |
166 | backend_poll = kqueue_poll; |
| 167 | |
167 | |
| 168 | kqueue_eventmax = 64; /* initial number of events receivable per poll */ |
168 | kqueue_eventmax = 64; /* initial number of events receivable per poll */ |
| 169 | kqueue_events = (struct kevent *)ev_malloc (sizeof (struct kevent) * kqueue_eventmax); |
169 | kqueue_events = (struct kevent *)ev_malloc (sizeof (struct kevent) * kqueue_eventmax); |
| 170 | |
170 | |
| 171 | kqueue_changes = 0; |
171 | kqueue_changes = 0; |
| … | |
… | |
| 194 | |
194 | |
| 195 | /* re-register interest in fds */ |
195 | /* re-register interest in fds */ |
| 196 | fd_rearm_all (EV_A); |
196 | fd_rearm_all (EV_A); |
| 197 | } |
197 | } |
| 198 | |
198 | |
|
|
199 | /* sys/event.h defines EV_ERROR */ |
|
|
200 | #undef EV_ERROR |
|
|
201 | |
