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
#	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			#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