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/cvs/libev/event_compat.h
Revision: 1.2
Committed: Thu Nov 8 23:53:41 2007 UTC (16 years, 6 months ago) by root
Content type: text/plain
Branch: MAIN
Changes since 1.1: +1 -0 lines
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File Contents

# Content
1 /*
2 * Copyright (c) 2000-2004 Niels Provos <provos@citi.umich.edu>
3 * All rights reserved.
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 #ifdef __cplusplus
28 extern "C" {
29 #endif
30
31 #include <sys/types.h>
32 #include <sys/time.h>
33 #include <stdint.h>
34 #include <stdarg.h>
35
36 #ifdef WIN32
37 #define WIN32_LEAN_AND_MEAN
38 #include <windows.h>
39 #undef WIN32_LEAN_AND_MEAN
40 typedef unsigned char u_char;
41 typedef unsigned short u_short;
42 #endif
43
44 /* Fix so that ppl dont have to run with <sys/queue.h> */
45 #ifndef TAILQ_ENTRY
46 #define _EVENT_DEFINED_TQENTRY
47 #define TAILQ_ENTRY(type) \
48 struct { \
49 struct type *tqe_next; /* next element */ \
50 struct type **tqe_prev; /* address of previous next element */ \
51 }
52 #endif /* !TAILQ_ENTRY */
53 #ifndef RB_ENTRY
54 #define _EVENT_DEFINED_RBENTRY
55 #define RB_ENTRY(type) \
56 struct { \
57 struct type *rbe_left; /* left element */ \
58 struct type *rbe_right; /* right element */ \
59 struct type *rbe_parent; /* parent element */ \
60 int rbe_color; /* node color */ \
61 }
62 #endif /* !RB_ENTRY */
63
64 /*
65 * Key-Value pairs. Can be used for HTTP headers but also for
66 * query argument parsing.
67 */
68 struct evkeyval {
69 TAILQ_ENTRY(evkeyval) next;
70
71 char *key;
72 char *value;
73 };
74
75 #ifdef _EVENT_DEFINED_TQENTRY
76 #undef TAILQ_ENTRY
77 struct event_list;
78 struct evkeyvalq;
79 #undef _EVENT_DEFINED_TQENTRY
80 #else
81 TAILQ_HEAD (event_list, event);
82 TAILQ_HEAD (evkeyvalq, evkeyval);
83 #endif /* _EVENT_DEFINED_TQENTRY */
84 #ifdef _EVENT_DEFINED_RBENTRY
85 #undef RB_ENTRY
86 #undef _EVENT_DEFINED_RBENTRY
87 #endif /* _EVENT_DEFINED_RBENTRY */
88
89 struct eventop {
90 char *name;
91 void *(*init)(struct event_base *);
92 int (*add)(void *, struct event *);
93 int (*del)(void *, struct event *);
94 int (*recalc)(struct event_base *, void *, int);
95 int (*dispatch)(struct event_base *, void *, struct timeval *);
96 void (*dealloc)(struct event_base *, void *);
97 };
98
99 /* These functions deal with buffering input and output */
100
101 struct evbuffer {
102 u_char *buffer;
103 u_char *orig_buffer;
104
105 size_t misalign;
106 size_t totallen;
107 size_t off;
108
109 void (*cb)(struct evbuffer *, size_t, size_t, void *);
110 void *cbarg;
111 };
112
113 /* Just for error reporting - use other constants otherwise */
114 #define EVBUFFER_READ 0x01
115 #define EVBUFFER_WRITE 0x02
116 #define EVBUFFER_EOF 0x10
117 #define EVBUFFER_ERROR 0x20
118 #define EVBUFFER_TIMEOUT 0x40
119
120 struct bufferevent;
121 typedef void (*evbuffercb)(struct bufferevent *, void *);
122 typedef void (*everrorcb)(struct bufferevent *, short what, void *);
123
124 struct event_watermark {
125 size_t low;
126 size_t high;
127 };
128
129 struct bufferevent {
130 struct event ev_read;
131 struct event ev_write;
132
133 struct evbuffer *input;
134 struct evbuffer *output;
135
136 struct event_watermark wm_read;
137 struct event_watermark wm_write;
138
139 evbuffercb readcb;
140 evbuffercb writecb;
141 everrorcb errorcb;
142 void *cbarg;
143
144 int timeout_read; /* in seconds */
145 int timeout_write; /* in seconds */
146
147 short enabled; /* events that are currently enabled */
148 };
149
150 struct bufferevent *bufferevent_new(int fd,
151 evbuffercb readcb, evbuffercb writecb, everrorcb errorcb, void *cbarg);
152 int bufferevent_base_set(struct event_base *base, struct bufferevent *bufev);
153 int bufferevent_priority_set(struct bufferevent *bufev, int pri);
154 void bufferevent_free(struct bufferevent *bufev);
155 int bufferevent_write(struct bufferevent *bufev, void *data, size_t size);
156 int bufferevent_write_buffer(struct bufferevent *bufev, struct evbuffer *buf);
157 size_t bufferevent_read(struct bufferevent *bufev, void *data, size_t size);
158 int bufferevent_enable(struct bufferevent *bufev, short event);
159 int bufferevent_disable(struct bufferevent *bufev, short event);
160 void bufferevent_settimeout(struct bufferevent *bufev,
161 int timeout_read, int timeout_write);
162
163 #define EVBUFFER_LENGTH(x) (x)->off
164 #define EVBUFFER_DATA(x) (x)->buffer
165 #define EVBUFFER_INPUT(x) (x)->input
166 #define EVBUFFER_OUTPUT(x) (x)->output
167
168 struct evbuffer *evbuffer_new(void);
169 void evbuffer_free(struct evbuffer *);
170 int evbuffer_expand(struct evbuffer *, size_t);
171 int evbuffer_add(struct evbuffer *, const void *, size_t);
172 int evbuffer_remove(struct evbuffer *, void *, size_t);
173 char *evbuffer_readline(struct evbuffer *);
174 int evbuffer_add_buffer(struct evbuffer *, struct evbuffer *);
175 int evbuffer_add_printf(struct evbuffer *, const char *fmt, ...);
176 int evbuffer_add_vprintf(struct evbuffer *, const char *fmt, va_list ap);
177 void evbuffer_drain(struct evbuffer *, size_t);
178 int evbuffer_write(struct evbuffer *, int);
179 int evbuffer_read(struct evbuffer *, int, int);
180 u_char *evbuffer_find(struct evbuffer *, const u_char *, size_t);
181 void evbuffer_setcb(struct evbuffer *, void (*)(struct evbuffer *, size_t, size_t, void *), void *);
182
183 /*
184 * Marshaling tagged data - We assume that all tags are inserted in their
185 * numeric order - so that unknown tags will always be higher than the
186 * known ones - and we can just ignore the end of an event buffer.
187 */
188
189 void evtag_init(void);
190
191 void evtag_marshal(struct evbuffer *evbuf, uint8_t tag, const void *data,
192 uint32_t len);
193
194 void encode_int(struct evbuffer *evbuf, uint32_t number);
195
196 void evtag_marshal_int(struct evbuffer *evbuf, uint8_t tag, uint32_t integer);
197
198 void evtag_marshal_string(struct evbuffer *buf, uint8_t tag,
199 const char *string);
200
201 void evtag_marshal_timeval(struct evbuffer *evbuf, uint8_t tag,
202 struct timeval *tv);
203
204 void evtag_test(void);
205
206 int evtag_unmarshal(struct evbuffer *src, uint8_t *ptag, struct evbuffer *dst);
207 int evtag_peek(struct evbuffer *evbuf, uint8_t *ptag);
208 int evtag_peek_length(struct evbuffer *evbuf, uint32_t *plength);
209 int evtag_payload_length(struct evbuffer *evbuf, uint32_t *plength);
210 int evtag_consume(struct evbuffer *evbuf);
211
212 int evtag_unmarshal_int(struct evbuffer *evbuf, uint8_t need_tag,
213 uint32_t *pinteger);
214
215 int evtag_unmarshal_fixed(struct evbuffer *src, uint8_t need_tag, void *data,
216 size_t len);
217
218 int evtag_unmarshal_string(struct evbuffer *evbuf, uint8_t need_tag,
219 char **pstring);
220
221 int evtag_unmarshal_timeval(struct evbuffer *evbuf, uint8_t need_tag,
222 struct timeval *ptv);
223
224 #ifdef __cplusplus
225 }
226 #endif