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

# User Rev Content
1 root 1.1 /*
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 root 1.2 #include <sys/types.h>
32 root 1.1 #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