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 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 | |
… | |
… | |
160 | if ((backend_fd = kqueue ()) < 0) |
159 | if ((backend_fd = kqueue ()) < 0) |
161 | return 0; |
160 | return 0; |
162 | |
161 | |
163 | 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 */ |
164 | |
163 | |
165 | backend_fudge = 0.; |
164 | backend_mintime = 1e-9; /* apparently, they did the right thing in freebsd */ |
166 | backend_modify = kqueue_modify; |
165 | backend_modify = kqueue_modify; |
167 | backend_poll = kqueue_poll; |
166 | backend_poll = kqueue_poll; |
168 | |
167 | |
169 | kqueue_eventmax = 64; /* initial number of events receivable per poll */ |
168 | kqueue_eventmax = 64; /* initial number of events receivable per poll */ |
170 | kqueue_events = (struct kevent *)ev_malloc (sizeof (struct kevent) * kqueue_eventmax); |
169 | kqueue_events = (struct kevent *)ev_malloc (sizeof (struct kevent) * kqueue_eventmax); |
171 | |
170 | |
172 | kqueue_changes = 0; |
171 | kqueue_changes = 0; |