libev/event_compat.h

/*
 * Copyright (c) 2000-2004 Niels Provos <provos@citi.umich.edu>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
#ifdef __cplusplus
extern "C" {
#endif

#include <sys/time.h>
#include <stdint.h>
#include <stdarg.h>

#ifdef WIN32
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#undef WIN32_LEAN_AND_MEAN
typedef unsigned char u_char;
typedef unsigned short u_short;
#endif

/* Fix so that ppl dont have to run with <sys/queue.h> */
#ifndef TAILQ_ENTRY
#define _EVENT_DEFINED_TQENTRY
#define TAILQ_ENTRY(type)                                               \
struct {                                                                \
        struct type *tqe_next;  /* next element */                      \
        struct type **tqe_prev; /* address of previous next element */  \
}
#endif /* !TAILQ_ENTRY */
#ifndef RB_ENTRY
#define _EVENT_DEFINED_RBENTRY
#define RB_ENTRY(type)                                                  \
struct {                                                                \
        struct type *rbe_left;          /* left element */              \
        struct type *rbe_right;         /* right element */             \
        struct type *rbe_parent;        /* parent element */            \
        int rbe_color;                  /* node color */                \
}
#endif /* !RB_ENTRY */

/*
 * Key-Value pairs.  Can be used for HTTP headers but also for
 * query argument parsing.
 */
struct evkeyval {
        TAILQ_ENTRY(evkeyval) next;

        char *key;
        char *value;
};

#ifdef _EVENT_DEFINED_TQENTRY
#undef TAILQ_ENTRY
struct event_list;
struct evkeyvalq;
#undef _EVENT_DEFINED_TQENTRY
#else
TAILQ_HEAD (event_list, event);
TAILQ_HEAD (evkeyvalq, evkeyval);
#endif /* _EVENT_DEFINED_TQENTRY */
#ifdef _EVENT_DEFINED_RBENTRY
#undef RB_ENTRY
#undef _EVENT_DEFINED_RBENTRY
#endif /* _EVENT_DEFINED_RBENTRY */

struct eventop {
        char *name;
        void *(*init)(struct event_base *);
        int (*add)(void *, struct event *);
        int (*del)(void *, struct event *);
        int (*recalc)(struct event_base *, void *, int);
        int (*dispatch)(struct event_base *, void *, struct timeval *);
        void (*dealloc)(struct event_base *, void *);
};

/* These functions deal with buffering input and output */

struct evbuffer {
        u_char *buffer;
        u_char *orig_buffer;

        size_t misalign;
        size_t totallen;
        size_t off;

        void (*cb)(struct evbuffer *, size_t, size_t, void *);
        void *cbarg;
};

/* Just for error reporting - use other constants otherwise */
#define EVBUFFER_READ           0x01
#define EVBUFFER_WRITE          0x02
#define EVBUFFER_EOF            0x10
#define EVBUFFER_ERROR          0x20
#define EVBUFFER_TIMEOUT        0x40

struct bufferevent;
typedef void (*evbuffercb)(struct bufferevent *, void *);
typedef void (*everrorcb)(struct bufferevent *, short what, void *);

struct event_watermark {
        size_t low;
        size_t high;
};

struct bufferevent {
        struct event ev_read;
        struct event ev_write;

        struct evbuffer *input;
        struct evbuffer *output;

        struct event_watermark wm_read;
        struct event_watermark wm_write;

        evbuffercb readcb;
        evbuffercb writecb;
        everrorcb errorcb;
        void *cbarg;

        int timeout_read;       /* in seconds */
        int timeout_write;      /* in seconds */

        short enabled;  /* events that are currently enabled */
};

struct bufferevent *bufferevent_new(int fd,
    evbuffercb readcb, evbuffercb writecb, everrorcb errorcb, void *cbarg);
int bufferevent_base_set(struct event_base *base, struct bufferevent *bufev);
int bufferevent_priority_set(struct bufferevent *bufev, int pri);
void bufferevent_free(struct bufferevent *bufev);
int bufferevent_write(struct bufferevent *bufev, void *data, size_t size);
int bufferevent_write_buffer(struct bufferevent *bufev, struct evbuffer *buf);
size_t bufferevent_read(struct bufferevent *bufev, void *data, size_t size);
int bufferevent_enable(struct bufferevent *bufev, short event);
int bufferevent_disable(struct bufferevent *bufev, short event);
void bufferevent_settimeout(struct bufferevent *bufev,
    int timeout_read, int timeout_write);

#define EVBUFFER_LENGTH(x)      (x)->off
#define EVBUFFER_DATA(x)        (x)->buffer
#define EVBUFFER_INPUT(x)       (x)->input
#define EVBUFFER_OUTPUT(x)      (x)->output

struct evbuffer *evbuffer_new(void);
void evbuffer_free(struct evbuffer *);
int evbuffer_expand(struct evbuffer *, size_t);
int evbuffer_add(struct evbuffer *, const void *, size_t);
int evbuffer_remove(struct evbuffer *, void *, size_t);
char *evbuffer_readline(struct evbuffer *);
int evbuffer_add_buffer(struct evbuffer *, struct evbuffer *);
int evbuffer_add_printf(struct evbuffer *, const char *fmt, ...);
int evbuffer_add_vprintf(struct evbuffer *, const char *fmt, va_list ap);
void evbuffer_drain(struct evbuffer *, size_t);
int evbuffer_write(struct evbuffer *, int);
int evbuffer_read(struct evbuffer *, int, int);
u_char *evbuffer_find(struct evbuffer *, const u_char *, size_t);
void evbuffer_setcb(struct evbuffer *, void (*)(struct evbuffer *, size_t, size_t, void *), void *);

/* 
 * Marshaling tagged data - We assume that all tags are inserted in their
 * numeric order - so that unknown tags will always be higher than the
 * known ones - and we can just ignore the end of an event buffer.
 */

void evtag_init(void);

void evtag_marshal(struct evbuffer *evbuf, uint8_t tag, const void *data,
    uint32_t len);

void encode_int(struct evbuffer *evbuf, uint32_t number);

void evtag_marshal_int(struct evbuffer *evbuf, uint8_t tag, uint32_t integer);

void evtag_marshal_string(struct evbuffer *buf, uint8_t tag,
    const char *string);

void evtag_marshal_timeval(struct evbuffer *evbuf, uint8_t tag,
    struct timeval *tv);

void evtag_test(void);

int evtag_unmarshal(struct evbuffer *src, uint8_t *ptag, struct evbuffer *dst);
int evtag_peek(struct evbuffer *evbuf, uint8_t *ptag);
int evtag_peek_length(struct evbuffer *evbuf, uint32_t *plength);
int evtag_payload_length(struct evbuffer *evbuf, uint32_t *plength);
int evtag_consume(struct evbuffer *evbuf);

int evtag_unmarshal_int(struct evbuffer *evbuf, uint8_t need_tag,
    uint32_t *pinteger);

int evtag_unmarshal_fixed(struct evbuffer *src, uint8_t need_tag, void *data,
    size_t len);

int evtag_unmarshal_string(struct evbuffer *evbuf, uint8_t need_tag,
    char **pstring);

int evtag_unmarshal_timeval(struct evbuffer *evbuf, uint8_t need_tag,
    struct timeval *ptv);

#ifdef __cplusplus
}
#endif
Revision:	1.1
Committed:	Sat Nov 3 19:41:56 2007 UTC (16 years, 10 months ago) by root
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rel-0_51, rel-0_5, rel-0_6
Log Message:	try to programmatically integrate libevent
#	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/time.h>
32	#include <stdint.h>
33	#include <stdarg.h>
34
35	#ifdef WIN32
36	#define WIN32_LEAN_AND_MEAN
37	#include <windows.h>
38	#undef WIN32_LEAN_AND_MEAN
39	typedef unsigned char u_char;
40	typedef unsigned short u_short;
41	#endif
42
43	/* Fix so that ppl dont have to run with <sys/queue.h> */
44	#ifndef TAILQ_ENTRY
45	#define _EVENT_DEFINED_TQENTRY
46	#define TAILQ_ENTRY(type) \
47	struct { \
48	struct type tqe_next; / next element */ \
49	struct type *tqe_prev; / address of previous next element */ \
50	}
51	#endif /* !TAILQ_ENTRY */
52	#ifndef RB_ENTRY
53	#define _EVENT_DEFINED_RBENTRY
54	#define RB_ENTRY(type) \
55	struct { \
56	struct type rbe_left; / left element */ \
57	struct type rbe_right; / right element */ \
58	struct type rbe_parent; / parent element */ \
59	int rbe_color; /* node color */ \
60	}
61	#endif /* !RB_ENTRY */
62
63	/*
64	* Key-Value pairs. Can be used for HTTP headers but also for
65	* query argument parsing.
66	*/
67	struct evkeyval {
68	TAILQ_ENTRY(evkeyval) next;
69
70	char *key;
71	char *value;
72	};
73
74	#ifdef _EVENT_DEFINED_TQENTRY
75	#undef TAILQ_ENTRY
76	struct event_list;
77	struct evkeyvalq;
78	#undef _EVENT_DEFINED_TQENTRY
79	#else
80	TAILQ_HEAD (event_list, event);
81	TAILQ_HEAD (evkeyvalq, evkeyval);
82	#endif /* _EVENT_DEFINED_TQENTRY */
83	#ifdef _EVENT_DEFINED_RBENTRY
84	#undef RB_ENTRY
85	#undef _EVENT_DEFINED_RBENTRY
86	#endif /* _EVENT_DEFINED_RBENTRY */
87
88	struct eventop {
89	char *name;
90	void (init)(struct event_base *);
91	int (add)(void , struct event *);
92	int (del)(void , struct event *);
93	int (recalc)(struct event_base , void *, int);
94	int (dispatch)(struct event_base , void , struct timeval );
95	void (dealloc)(struct event_base , void *);
96	};
97
98	/* These functions deal with buffering input and output */
99
100	struct evbuffer {
101	u_char *buffer;
102	u_char *orig_buffer;
103
104	size_t misalign;
105	size_t totallen;
106	size_t off;
107
108	void (cb)(struct evbuffer , size_t, size_t, void *);
109	void *cbarg;
110	};
111
112	/* Just for error reporting - use other constants otherwise */
113	#define EVBUFFER_READ 0x01
114	#define EVBUFFER_WRITE 0x02
115	#define EVBUFFER_EOF 0x10
116	#define EVBUFFER_ERROR 0x20
117	#define EVBUFFER_TIMEOUT 0x40
118
119	struct bufferevent;
120	typedef void (evbuffercb)(struct bufferevent , void *);
121	typedef void (everrorcb)(struct bufferevent , short what, void *);
122
123	struct event_watermark {
124	size_t low;
125	size_t high;
126	};
127
128	struct bufferevent {
129	struct event ev_read;
130	struct event ev_write;
131
132	struct evbuffer *input;
133	struct evbuffer *output;
134
135	struct event_watermark wm_read;
136	struct event_watermark wm_write;
137
138	evbuffercb readcb;
139	evbuffercb writecb;
140	everrorcb errorcb;
141	void *cbarg;
142
143	int timeout_read; /* in seconds */
144	int timeout_write; /* in seconds */
145
146	short enabled; /* events that are currently enabled */
147	};
148
149	struct bufferevent *bufferevent_new(int fd,
150	evbuffercb readcb, evbuffercb writecb, everrorcb errorcb, void *cbarg);
151	int bufferevent_base_set(struct event_base base, struct bufferevent bufev);
152	int bufferevent_priority_set(struct bufferevent *bufev, int pri);
153	void bufferevent_free(struct bufferevent *bufev);
154	int bufferevent_write(struct bufferevent bufev, void data, size_t size);
155	int bufferevent_write_buffer(struct bufferevent bufev, struct evbuffer buf);
156	size_t bufferevent_read(struct bufferevent bufev, void data, size_t size);
157	int bufferevent_enable(struct bufferevent *bufev, short event);
158	int bufferevent_disable(struct bufferevent *bufev, short event);
159	void bufferevent_settimeout(struct bufferevent *bufev,
160	int timeout_read, int timeout_write);
161
162	#define EVBUFFER_LENGTH(x) (x)->off
163	#define EVBUFFER_DATA(x) (x)->buffer
164	#define EVBUFFER_INPUT(x) (x)->input
165	#define EVBUFFER_OUTPUT(x) (x)->output
166
167	struct evbuffer *evbuffer_new(void);
168	void evbuffer_free(struct evbuffer *);
169	int evbuffer_expand(struct evbuffer *, size_t);
170	int evbuffer_add(struct evbuffer , const void , size_t);
171	int evbuffer_remove(struct evbuffer , void , size_t);
172	char evbuffer_readline(struct evbuffer );
173	int evbuffer_add_buffer(struct evbuffer , struct evbuffer );
174	int evbuffer_add_printf(struct evbuffer , const char fmt, ...);
175	int evbuffer_add_vprintf(struct evbuffer , const char fmt, va_list ap);
176	void evbuffer_drain(struct evbuffer *, size_t);
177	int evbuffer_write(struct evbuffer *, int);
178	int evbuffer_read(struct evbuffer *, int, int);
179	u_char evbuffer_find(struct evbuffer , const u_char *, size_t);
180	void evbuffer_setcb(struct evbuffer , void ()(struct evbuffer , size_t, size_t, void ), void *);
181
182	/*
183	* Marshaling tagged data - We assume that all tags are inserted in their
184	* numeric order - so that unknown tags will always be higher than the
185	* known ones - and we can just ignore the end of an event buffer.
186	*/
187
188	void evtag_init(void);
189
190	void evtag_marshal(struct evbuffer evbuf, uint8_t tag, const void data,
191	uint32_t len);
192
193	void encode_int(struct evbuffer *evbuf, uint32_t number);
194
195	void evtag_marshal_int(struct evbuffer *evbuf, uint8_t tag, uint32_t integer);
196
197	void evtag_marshal_string(struct evbuffer *buf, uint8_t tag,
198	const char *string);
199
200	void evtag_marshal_timeval(struct evbuffer *evbuf, uint8_t tag,
201	struct timeval *tv);
202
203	void evtag_test(void);
204
205	int evtag_unmarshal(struct evbuffer src, uint8_t ptag, struct evbuffer *dst);
206	int evtag_peek(struct evbuffer evbuf, uint8_t ptag);
207	int evtag_peek_length(struct evbuffer evbuf, uint32_t plength);
208	int evtag_payload_length(struct evbuffer evbuf, uint32_t plength);
209	int evtag_consume(struct evbuffer *evbuf);
210
211	int evtag_unmarshal_int(struct evbuffer *evbuf, uint8_t need_tag,
212	uint32_t *pinteger);
213
214	int evtag_unmarshal_fixed(struct evbuffer src, uint8_t need_tag, void data,
215	size_t len);
216
217	int evtag_unmarshal_string(struct evbuffer *evbuf, uint8_t need_tag,
218	char **pstring);
219
220	int evtag_unmarshal_timeval(struct evbuffer *evbuf, uint8_t need_tag,
221	struct timeval *ptv);
222
223	#ifdef __cplusplus
224	}
225	#endif