2 * Copyright (c) 2000-2004 Niels Provos <provos@citi.umich.edu>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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.
37 #define WIN32_LEAN_AND_MEAN
39 #undef WIN32_LEAN_AND_MEAN
40 typedef unsigned char u_char;
41 typedef unsigned short u_short;
44 #define EVLIST_TIMEOUT 0x01
45 #define EVLIST_INSERTED 0x02
46 #define EVLIST_SIGNAL 0x04
47 #define EVLIST_ACTIVE 0x08
48 #define EVLIST_INTERNAL 0x10
49 #define EVLIST_INIT 0x80
51 /* EVLIST_X_ Private space: 0x1000-0xf000 */
52 #define EVLIST_ALL (0xf000 | 0x9f)
54 #define EV_TIMEOUT 0x01
57 #define EV_SIGNAL 0x08
58 #define EV_PERSIST 0x10 /* Persistant event */
60 /* Fix so that ppl dont have to run with <sys/queue.h> */
62 #define _EVENT_DEFINED_TQENTRY
63 #define TAILQ_ENTRY(type) \
65 struct type *tqe_next; /* next element */ \
66 struct type **tqe_prev; /* address of previous next element */ \
68 #endif /* !TAILQ_ENTRY */
70 #define _EVENT_DEFINED_RBENTRY
71 #define RB_ENTRY(type) \
73 struct type *rbe_left; /* left element */ \
74 struct type *rbe_right; /* right element */ \
75 struct type *rbe_parent; /* parent element */ \
77 #endif /* !RB_ENTRY */
81 TAILQ_ENTRY (event) ev_next;
82 TAILQ_ENTRY (event) ev_active_next;
83 TAILQ_ENTRY (event) ev_signal_next;
84 RB_ENTRY (event) ev_timeout_node;
86 struct event_base *ev_base;
90 short *ev_pncalls; /* Allows deletes in callback */
92 struct timeval ev_timeout;
94 int ev_pri; /* smaller numbers are higher priority */
96 void (*ev_callback)(int, short, void *arg);
99 int ev_res; /* result passed to event callback */
103 #define EVENT_SIGNAL(ev) (int)(ev)->ev_fd
104 #define EVENT_FD(ev) (int)(ev)->ev_fd
107 * Key-Value pairs. Can be used for HTTP headers but also for
108 * query argument parsing.
111 TAILQ_ENTRY(evkeyval) next;
117 #ifdef _EVENT_DEFINED_TQENTRY
121 #undef _EVENT_DEFINED_TQENTRY
123 TAILQ_HEAD (event_list, event);
124 TAILQ_HEAD (evkeyvalq, evkeyval);
125 #endif /* _EVENT_DEFINED_TQENTRY */
126 #ifdef _EVENT_DEFINED_RBENTRY
128 #undef _EVENT_DEFINED_RBENTRY
129 #endif /* _EVENT_DEFINED_RBENTRY */
134 int (*add)(void *, struct event *);
135 int (*del)(void *, struct event *);
136 int (*recalc)(struct event_base *, void *, int);
137 int (*dispatch)(struct event_base *, void *, struct timeval *);
138 void (*dealloc)(void *);
141 #define TIMEOUT_DEFAULT {5, 0}
143 void *event_init(void);
144 int event_dispatch(void);
145 int event_base_dispatch(struct event_base *);
146 void event_base_free(struct event_base *);
148 #define _EVENT_LOG_DEBUG 0
149 #define _EVENT_LOG_MSG 1
150 #define _EVENT_LOG_WARN 2
151 #define _EVENT_LOG_ERR 3
152 typedef void (*event_log_cb)(int severity, const char *msg);
153 void event_set_log_callback(event_log_cb cb);
155 /* Associate a different event base with an event */
156 int event_base_set(struct event_base *, struct event *);
158 #define EVLOOP_ONCE 0x01
159 #define EVLOOP_NONBLOCK 0x02
161 int event_base_loop(struct event_base *, int);
162 int event_loopexit(struct timeval *); /* Causes the loop to exit */
163 int event_base_loopexit(struct event_base *, struct timeval *);
165 #define evtimer_add(ev, tv) event_add(ev, tv)
166 #define evtimer_set(ev, cb, arg) event_set(ev, -1, 0, cb, arg)
167 #define evtimer_del(ev) event_del(ev)
168 #define evtimer_pending(ev, tv) event_pending(ev, EV_TIMEOUT, tv)
169 #define evtimer_initialized(ev) ((ev)->ev_flags & EVLIST_INIT)
171 #define timeout_add(ev, tv) event_add(ev, tv)
172 #define timeout_set(ev, cb, arg) event_set(ev, -1, 0, cb, arg)
173 #define timeout_del(ev) event_del(ev)
174 #define timeout_pending(ev, tv) event_pending(ev, EV_TIMEOUT, tv)
175 #define timeout_initialized(ev) ((ev)->ev_flags & EVLIST_INIT)
177 #define signal_add(ev, tv) event_add(ev, tv)
178 #define signal_set(ev, x, cb, arg) \
179 event_set(ev, x, EV_SIGNAL|EV_PERSIST, cb, arg)
180 #define signal_del(ev) event_del(ev)
181 #define signal_pending(ev, tv) event_pending(ev, EV_SIGNAL, tv)
182 #define signal_initialized(ev) ((ev)->ev_flags & EVLIST_INIT)
184 void event_set(struct event *, int, short, void (*)(int, short, void *), void *);
185 int event_once(int, short, void (*)(int, short, void *), void *, struct timeval *);
187 int event_add(struct event *, struct timeval *);
188 int event_del(struct event *);
189 void event_active(struct event *, int, short);
191 int event_pending(struct event *, short, struct timeval *);
194 #define event_initialized(ev) ((ev)->ev_flags & EVLIST_INIT && (ev)->ev_fd != (int)INVALID_HANDLE_VALUE)
196 #define event_initialized(ev) ((ev)->ev_flags & EVLIST_INIT)
199 /* Some simple debugging functions */
200 const char *event_get_version(void);
201 const char *event_get_method(void);
203 /* These functions deal with event priorities */
205 int event_priority_init(int);
206 int event_base_priority_init(struct event_base *, int);
207 int event_priority_set(struct event *, int);
209 /* These functions deal with buffering input and output */
219 void (*cb)(struct evbuffer *, size_t, size_t, void *);
223 /* Just for error reporting - use other constants otherwise */
224 #define EVBUFFER_READ 0x01
225 #define EVBUFFER_WRITE 0x02
226 #define EVBUFFER_EOF 0x10
227 #define EVBUFFER_ERROR 0x20
228 #define EVBUFFER_TIMEOUT 0x40
231 typedef void (*evbuffercb)(struct bufferevent *, void *);
232 typedef void (*everrorcb)(struct bufferevent *, short what, void *);
234 struct event_watermark {
240 struct event ev_read;
241 struct event ev_write;
243 struct evbuffer *input;
244 struct evbuffer *output;
246 struct event_watermark wm_read;
247 struct event_watermark wm_write;
254 int timeout_read; /* in seconds */
255 int timeout_write; /* in seconds */
257 short enabled; /* events that are currently enabled */
260 struct bufferevent *bufferevent_new(int fd,
261 evbuffercb readcb, evbuffercb writecb, everrorcb errorcb, void *cbarg);
262 int bufferevent_base_set(struct event_base *base, struct bufferevent *bufev);
263 int bufferevent_priority_set(struct bufferevent *bufev, int pri);
264 void bufferevent_free(struct bufferevent *bufev);
265 int bufferevent_write(struct bufferevent *bufev, void *data, size_t size);
266 int bufferevent_write_buffer(struct bufferevent *bufev, struct evbuffer *buf);
267 size_t bufferevent_read(struct bufferevent *bufev, void *data, size_t size);
268 int bufferevent_enable(struct bufferevent *bufev, short event);
269 int bufferevent_disable(struct bufferevent *bufev, short event);
270 void bufferevent_settimeout(struct bufferevent *bufev,
271 int timeout_read, int timeout_write);
273 #define EVBUFFER_LENGTH(x) (x)->off
274 #define EVBUFFER_DATA(x) (x)->buffer
275 #define EVBUFFER_INPUT(x) (x)->input
276 #define EVBUFFER_OUTPUT(x) (x)->output
278 struct evbuffer *evbuffer_new(void);
279 void evbuffer_free(struct evbuffer *);
280 int evbuffer_expand(struct evbuffer *, size_t);
281 int evbuffer_add(struct evbuffer *, const void *, size_t);
282 int evbuffer_remove(struct evbuffer *, void *, size_t);
283 char *evbuffer_readline(struct evbuffer *);
284 int evbuffer_add_buffer(struct evbuffer *, struct evbuffer *);
285 int evbuffer_add_printf(struct evbuffer *, const char *fmt, ...);
286 int evbuffer_add_vprintf(struct evbuffer *, const char *fmt, va_list ap);
287 void evbuffer_drain(struct evbuffer *, size_t);
288 int evbuffer_write(struct evbuffer *, int);
289 int evbuffer_read(struct evbuffer *, int, int);
290 u_char *evbuffer_find(struct evbuffer *, const u_char *, size_t);
291 void evbuffer_setcb(struct evbuffer *, void (*)(struct evbuffer *, size_t, size_t, void *), void *);
294 * Marshaling tagged data - We assume that all tags are inserted in their
295 * numeric order - so that unknown tags will always be higher than the
296 * known ones - and we can just ignore the end of an event buffer.
299 void evtag_init(void);
301 void evtag_marshal(struct evbuffer *evbuf, u_int8_t tag, const void *data,
304 void encode_int(struct evbuffer *evbuf, u_int32_t number);
306 void evtag_marshal_int(struct evbuffer *evbuf, u_int8_t tag,
309 void evtag_marshal_string(struct evbuffer *buf, u_int8_t tag,
312 void evtag_marshal_timeval(struct evbuffer *evbuf, u_int8_t tag,
315 void evtag_test(void);
317 int evtag_unmarshal(struct evbuffer *src, u_int8_t *ptag,
318 struct evbuffer *dst);
319 int evtag_peek(struct evbuffer *evbuf, u_int8_t *ptag);
320 int evtag_peek_length(struct evbuffer *evbuf, u_int32_t *plength);
321 int evtag_payload_length(struct evbuffer *evbuf, u_int32_t *plength);
322 int evtag_consume(struct evbuffer *evbuf);
324 int evtag_unmarshal_int(struct evbuffer *evbuf, u_int8_t need_tag,
325 u_int32_t *pinteger);
327 int evtag_unmarshal_fixed(struct evbuffer *src, u_int8_t need_tag, void *data,
330 int evtag_unmarshal_string(struct evbuffer *evbuf, u_int8_t need_tag,
333 int evtag_unmarshal_timeval(struct evbuffer *evbuf, u_int8_t need_tag,
334 struct timeval *ptv);
340 #endif /* _EVENT_H_ */