248 lines
7.8 KiB
C
248 lines
7.8 KiB
C
/* $NetBSD: event.h,v 1.3 2004/08/07 21:09:47 provos Exp $ */
|
|
/* $OpenBSD: event.h,v 1.4 2002/07/12 18:50:48 provos Exp $ */
|
|
|
|
/*
|
|
* 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. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by Niels Provos.
|
|
* 4. 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.
|
|
*/
|
|
#ifndef _EVENT_H_
|
|
#define _EVENT_H_
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
#define EVLIST_TIMEOUT 0x01
|
|
#define EVLIST_INSERTED 0x02
|
|
#define EVLIST_SIGNAL 0x04
|
|
#define EVLIST_ACTIVE 0x08
|
|
#define EVLIST_INTERNAL 0x10
|
|
#define EVLIST_INIT 0x80
|
|
|
|
/* EVLIST_X_ Private space: 0x1000-0xf000 */
|
|
#define EVLIST_ALL (0xf000 | 0x9f)
|
|
|
|
#define EV_TIMEOUT 0x01
|
|
#define EV_READ 0x02
|
|
#define EV_WRITE 0x04
|
|
#define EV_SIGNAL 0x08
|
|
#define EV_PERSIST 0x10 /* Persistant event */
|
|
|
|
/* 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 */
|
|
|
|
struct event {
|
|
TAILQ_ENTRY (event) ev_next;
|
|
TAILQ_ENTRY (event) ev_active_next;
|
|
TAILQ_ENTRY (event) ev_signal_next;
|
|
RB_ENTRY (event) ev_timeout_node;
|
|
|
|
int ev_fd;
|
|
short ev_events;
|
|
short ev_ncalls;
|
|
short *ev_pncalls; /* Allows deletes in callback */
|
|
|
|
struct timeval ev_timeout;
|
|
|
|
void (*ev_callback)(int, short, void *arg);
|
|
void *ev_arg;
|
|
|
|
int ev_res; /* result passed to event callback */
|
|
int ev_flags;
|
|
};
|
|
|
|
#define EVENT_SIGNAL(ev) ev->ev_fd
|
|
#define EVENT_FD(ev) ev->ev_fd
|
|
|
|
#ifdef _EVENT_DEFINED_TQENTRY
|
|
#undef TAILQ_ENTRY
|
|
#undef _EVENT_DEFINED_TQENTRY
|
|
#else
|
|
TAILQ_HEAD (event_list, event);
|
|
#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)(void);
|
|
int (*add)(void *, struct event *);
|
|
int (*del)(void *, struct event *);
|
|
int (*recalc)(void *, int);
|
|
int (*dispatch)(void *, struct timeval *);
|
|
};
|
|
|
|
#define TIMEOUT_DEFAULT {5, 0}
|
|
|
|
void event_init(void);
|
|
int event_dispatch(void);
|
|
|
|
#define EVLOOP_ONCE 0x01
|
|
#define EVLOOP_NONBLOCK 0x02
|
|
int event_loop(int);
|
|
int event_loopexit(struct timeval *); /* Causes the loop to exit */
|
|
|
|
int timeout_next(struct timeval *);
|
|
void timeout_correct(struct timeval *);
|
|
void timeout_process(void);
|
|
|
|
#define evtimer_add(ev, tv) event_add(ev, tv)
|
|
#define evtimer_set(ev, cb, arg) event_set(ev, -1, 0, cb, arg)
|
|
#define evtimer_del(ev) event_del(ev)
|
|
#define evtimer_pending(ev, tv) event_pending(ev, EV_TIMEOUT, tv)
|
|
#define evtimer_initialized(ev) ((ev)->ev_flags & EVLIST_INIT)
|
|
|
|
#define timeout_add(ev, tv) event_add(ev, tv)
|
|
#define timeout_set(ev, cb, arg) event_set(ev, -1, 0, cb, arg)
|
|
#define timeout_del(ev) event_del(ev)
|
|
#define timeout_pending(ev, tv) event_pending(ev, EV_TIMEOUT, tv)
|
|
#define timeout_initialized(ev) ((ev)->ev_flags & EVLIST_INIT)
|
|
|
|
#define signal_add(ev, tv) event_add(ev, tv)
|
|
#define signal_set(ev, x, cb, arg) \
|
|
event_set(ev, x, EV_SIGNAL|EV_PERSIST, cb, arg)
|
|
#define signal_del(ev) event_del(ev)
|
|
#define signal_pending(ev, tv) event_pending(ev, EV_SIGNAL, tv)
|
|
#define signal_initialized(ev) ((ev)->ev_flags & EVLIST_INIT)
|
|
|
|
void event_set(struct event *, int, short, void (*)(int, short, void *), void *);
|
|
int event_once(int, short, void (*)(int, short, void *), void *, struct timeval *);
|
|
|
|
int event_add(struct event *, struct timeval *);
|
|
int event_del(struct event *);
|
|
void event_active(struct event *, int, short);
|
|
|
|
int event_pending(struct event *, short, struct timeval *);
|
|
|
|
#define event_initialized(ev) ((ev)->ev_flags & EVLIST_INIT)
|
|
|
|
/* 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);
|
|
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 *, void *, size_t);
|
|
int evbuffer_remove(struct evbuffer *, void *, size_t);
|
|
int evbuffer_add_buffer(struct evbuffer *, struct evbuffer *);
|
|
int evbuffer_add_printf(struct evbuffer *, char *fmt, ...);
|
|
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 *, u_char *, size_t);
|
|
void evbuffer_setcb(struct evbuffer *, void (*)(struct evbuffer *, size_t, size_t, void *), void *);
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* _EVENT_H_ */
|