1 /*
2 * event.h
3 */
4
5 /*-
6 * SPDX-License-Identifier: BSD-2-Clause
7 *
8 * Copyright (c) 2009 Maksim Yevmenkin <m_evmenkin@yahoo.com>
9 * All rights reserved.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33
34 /*
35 * Hack to provide libevent (see devel/libevent port) like API.
36 * Should be removed if FreeBSD ever decides to import libevent into base.
37 */
38
39 #ifndef _EVENT_H_
40 #define _EVENT_H_ 1
41
42 #define EV_READ 0x02
43 #define EV_WRITE 0x04
44 #define EV_PERSIST 0x10 /* Persistent event */
45 #define EV_PENDING (1 << 13) /* internal use only! */
46 #define EV_HAS_TIMEOUT (1 << 14) /* internal use only! */
47 #define EV_CURRENT (1 << 15) /* internal use only! */
48
49 struct event
50 {
51 int fd;
52 short flags;
53 void (*cb)(int, short, void *);
54 void *cbarg;
55 struct timeval timeout;
56 struct timeval expire;
57
58 #ifdef EVENT_DEBUG
59 char const *files[3];
60 int lines[3];
61 #endif
62
63 TAILQ_ENTRY(event) next;
64 };
65
66 void event_init (void);
67 int event_dispatch (void);
68
69 void __event_set (struct event *, int, short,
70 void (*)(int, short, void *), void *);
71 int __event_add (struct event *, struct timeval const *);
72 int __event_del (struct event *);
73
74 #ifdef EVENT_DEBUG
75 #define event_log_err(fmt, args...) syslog(LOG_ERR, fmt, ##args)
76 #define event_log_info(fmt, args...) syslog(LOG_INFO, fmt, ##args)
77 #define event_log_notice(fmt, args...) syslog(LOG_NOTICE, fmt, ##args)
78 #define event_log_debug(fmt, args...) syslog(LOG_DEBUG, fmt, ##args)
79
80 #define event_set(ev, fd, flags, cb, cbarg) \
81 _event_set(__FILE__, __LINE__, ev, fd, flags, cb, cbarg)
82 #define event_add(ev, timeout) \
83 _event_add(__FILE__, __LINE__, ev, timeout)
84 #define event_del(ev) \
85 _event_del(__FILE__, __LINE__, ev)
86
87 #define evtimer_set(ev, cb, cbarg) \
88 _event_set(__FILE__, __LINE__, ev, -1, 0, cb, cbarg)
89 #define evtimer_add(ev, timeout) \
90 _event_add(__FILE__, __LINE__, ev, timeout)
91
92 static inline void
_event_set(char const * file,int line,struct event * ev,int fd,short flags,void (* cb)(int,short,void *),void * cbarg)93 _event_set(char const *file, int line, struct event *ev, int fd, short flags,
94 void (*cb)(int, short, void *), void *cbarg)
95 {
96 event_log_debug("set %s:%d ev=%p, fd=%d, flags=%#x, cb=%p, cbarg=%p",
97 file, line, ev, fd, flags, cb, cbarg);
98
99 ev->files[0] = file;
100 ev->lines[0] = line;
101
102 __event_set(ev, fd, flags, cb, cbarg);
103 }
104
105 static inline int
_event_add(char const * file,int line,struct event * ev,struct timeval const * timeout)106 _event_add(char const *file, int line, struct event *ev,
107 struct timeval const *timeout) {
108 event_log_debug("add %s:%d ev=%p, fd=%d, flags=%#x, cb=%p, cbarg=%p, " \
109 "timeout=%p", file, line, ev, ev->fd, ev->flags, ev->cb,
110 ev->cbarg, timeout);
111
112 ev->files[1] = file;
113 ev->lines[1] = line;
114
115 return (__event_add(ev, timeout));
116 }
117
118 static inline int
_event_del(char const * file,int line,struct event * ev)119 _event_del(char const *file, int line, struct event *ev)
120 {
121 event_log_debug("del %s:%d ev=%p, fd=%d, flags=%#x, cb=%p, cbarg=%p",
122 file, line, ev, ev->fd, ev->flags, ev->cb, ev->cbarg);
123
124 ev->files[2] = file;
125 ev->lines[2] = line;
126
127 return (__event_del(ev));
128 }
129 #else
130 #define event_log_err(fmt, args...)
131 #define event_log_info(fmt, args...)
132 #define event_log_notice(fmt, args...)
133 #define event_log_debug(fmt, args...)
134
135 #define event_set(ev, fd, flags, cb, cbarg) \
136 __event_set(ev, fd, flags, cb, cbarg)
137 #define event_add(ev, timeout) \
138 __event_add(ev, timeout)
139 #define event_del(ev) \
140 __event_del(ev)
141
142 #define evtimer_set(ev, cb, cbarg) \
143 __event_set(ev, -1, 0, cb, cbarg)
144 #define evtimer_add(ev, timeout) \
145 __event_add(ev, timeout)
146 #endif /* EVENT_DEBUG */
147
148 #endif /* ndef _EVENT_H_ */
149