libevent (2.1.12)
1 /*
2 * Copyright (c) 2000-2007 Niels Provos <provos@citi.umich.edu>
3 * Copyright (c) 2007-2012 Niels Provos and Nick Mathewson
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. The name of the author may not be used to endorse or promote products
14 * derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27 #ifndef EVENT2_EVENT_COMPAT_H_INCLUDED_
28 #define EVENT2_EVENT_COMPAT_H_INCLUDED_
29
30 /** @file event2/event_compat.h
31
32 Potentially non-threadsafe versions of the functions in event.h: provided
33 only for backwards compatibility.
34
35 In the oldest versions of Libevent, event_base was not a first-class
36 structure. Instead, there was a single event base that every function
37 manipulated. Later, when separate event bases were added, the old functions
38 that didn't take an event_base argument needed to work by manipulating the
39 "current" event base. This could lead to thread-safety issues, and obscure,
40 hard-to-diagnose bugs.
41
42 @deprecated All functions in this file are by definition deprecated.
43 */
44 #include <event2/visibility.h>
45
46 #ifdef __cplusplus
47 extern "C" {
48 #endif
49
50 #include <event2/event-config.h>
51 #ifdef EVENT__HAVE_SYS_TYPES_H
52 #include <sys/types.h>
53 #endif
54 #ifdef EVENT__HAVE_SYS_TIME_H
55 #include <sys/time.h>
56 #endif
57
58 /* For int types. */
59 #include <event2/util.h>
60
61 /**
62 Initialize the event API.
63
64 The event API needs to be initialized with event_init() before it can be
65 used. Sets the global current base that gets used for events that have no
66 base associated with them.
67
68 @deprecated This function is deprecated because it replaces the "current"
69 event_base, and is totally unsafe for multithreaded use. The replacement
70 is event_base_new().
71
72 @see event_base_set(), event_base_new()
73 */
74 EVENT2_EXPORT_SYMBOL
75 struct event_base *event_init(void);
76
77 /**
78 Loop to process events.
79
80 Like event_base_dispatch(), but uses the "current" base.
81
82 @deprecated This function is deprecated because it is easily confused by
83 multiple calls to event_init(), and because it is not safe for
84 multithreaded use. The replacement is event_base_dispatch().
85
86 @see event_base_dispatch(), event_init()
87 */
88 EVENT2_EXPORT_SYMBOL
89 int event_dispatch(void);
90
91 /**
92 Handle events.
93
94 This function behaves like event_base_loop(), but uses the "current" base
95
96 @deprecated This function is deprecated because it uses the event base from
97 the last call to event_init, and is therefore not safe for multithreaded
98 use. The replacement is event_base_loop().
99
100 @see event_base_loop(), event_init()
101 */
102 EVENT2_EXPORT_SYMBOL
103 int event_loop(int);
104
105
106 /**
107 Exit the event loop after the specified time.
108
109 This function behaves like event_base_loopexit(), except that it uses the
110 "current" base.
111
112 @deprecated This function is deprecated because it uses the event base from
113 the last call to event_init, and is therefore not safe for multithreaded
114 use. The replacement is event_base_loopexit().
115
116 @see event_init, event_base_loopexit()
117 */
118 EVENT2_EXPORT_SYMBOL
119 int event_loopexit(const struct timeval *);
120
121
122 /**
123 Abort the active event_loop() immediately.
124
125 This function behaves like event_base_loopbreakt(), except that it uses the
126 "current" base.
127
128 @deprecated This function is deprecated because it uses the event base from
129 the last call to event_init, and is therefore not safe for multithreaded
130 use. The replacement is event_base_loopbreak().
131
132 @see event_base_loopbreak(), event_init()
133 */
134 EVENT2_EXPORT_SYMBOL
135 int event_loopbreak(void);
136
137 /**
138 Schedule a one-time event to occur.
139
140 @deprecated This function is obsolete, and has been replaced by
141 event_base_once(). Its use is deprecated because it relies on the
142 "current" base configured by event_init().
143
144 @see event_base_once()
145 */
146 EVENT2_EXPORT_SYMBOL
147 int event_once(evutil_socket_t , short,
148 void (*)(evutil_socket_t, short, void *), void *, const struct timeval *);
149
150
151 /**
152 Get the kernel event notification mechanism used by Libevent.
153
154 @deprecated This function is obsolete, and has been replaced by
155 event_base_get_method(). Its use is deprecated because it relies on the
156 "current" base configured by event_init().
157
158 @see event_base_get_method()
159 */
160 EVENT2_EXPORT_SYMBOL
161 const char *event_get_method(void);
162
163
164 /**
165 Set the number of different event priorities.
166
167 @deprecated This function is deprecated because it is easily confused by
168 multiple calls to event_init(), and because it is not safe for
169 multithreaded use. The replacement is event_base_priority_init().
170
171 @see event_base_priority_init()
172 */
173 EVENT2_EXPORT_SYMBOL
174 int event_priority_init(int);
175
176 /**
177 Prepare an event structure to be added.
178
179 @deprecated event_set() is not recommended for new code, because it requires
180 a subsequent call to event_base_set() to be safe under most circumstances.
181 Use event_assign() or event_new() instead.
182 */
183 EVENT2_EXPORT_SYMBOL
184 void event_set(struct event *, evutil_socket_t, short, void (*)(evutil_socket_t, short, void *), void *);
185
186 #define evtimer_set(ev, cb, arg) event_set((ev), -1, 0, (cb), (arg))
187 #define evsignal_set(ev, x, cb, arg) \
188 event_set((ev), (x), EV_SIGNAL|EV_PERSIST, (cb), (arg))
189
190
191 /**
192 @name timeout_* macros
193
194 @deprecated These macros are deprecated because their naming is inconsistent
195 with the rest of Libevent. Use the evtimer_* macros instead.
196 @{
197 */
198 #define timeout_add(ev, tv) event_add((ev), (tv))
199 #define timeout_set(ev, cb, arg) event_set((ev), -1, 0, (cb), (arg))
200 #define timeout_del(ev) event_del(ev)
201 #define timeout_pending(ev, tv) event_pending((ev), EV_TIMEOUT, (tv))
202 #define timeout_initialized(ev) event_initialized(ev)
203 /**@}*/
204
205 /**
206 @name signal_* macros
207
208 @deprecated These macros are deprecated because their naming is inconsistent
209 with the rest of Libevent. Use the evsignal_* macros instead.
210 @{
211 */
212 #define signal_add(ev, tv) event_add((ev), (tv))
213 #define signal_set(ev, x, cb, arg) \
214 event_set((ev), (x), EV_SIGNAL|EV_PERSIST, (cb), (arg))
215 #define signal_del(ev) event_del(ev)
216 #define signal_pending(ev, tv) event_pending((ev), EV_SIGNAL, (tv))
217 #define signal_initialized(ev) event_initialized(ev)
218 /**@}*/
219
220 #ifndef EVENT_FD
221 /* These macros are obsolete; use event_get_fd and event_get_signal instead. */
222 #define EVENT_FD(ev) ((int)event_get_fd(ev))
223 #define EVENT_SIGNAL(ev) event_get_signal(ev)
224 #endif
225
226 #ifdef __cplusplus
227 }
228 #endif
229
230 #endif /* EVENT2_EVENT_COMPAT_H_INCLUDED_ */
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