164 lines
5.2 KiB
C
164 lines
5.2 KiB
C
/* $NetBSD: event.h,v 1.2 2003/06/13 04:11:31 itojun Exp $ */
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/* $OpenBSD: event.h,v 1.4 2002/07/12 18:50:48 provos Exp $ */
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/*
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* Copyright 2000-2002 Niels Provos <provos@citi.umich.edu>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Niels Provos.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _EVENT_H_
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#define _EVENT_H_
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define EVLIST_TIMEOUT 0x01
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#define EVLIST_INSERTED 0x02
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#define EVLIST_SIGNAL 0x04
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#define EVLIST_ACTIVE 0x08
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#define EVLIST_INIT 0x80
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/* EVLIST_X_ Private space: 0x1000-0xf000 */
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#define EVLIST_ALL (0xf000 | 0x8f)
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#define EV_TIMEOUT 0x01
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#define EV_READ 0x02
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#define EV_WRITE 0x04
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#define EV_SIGNAL 0x08
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#define EV_PERSIST 0x10 /* Persistant event */
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/* Fix so that ppl dont have to run with <sys/queue.h> */
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#ifndef TAILQ_ENTRY
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#define _EVENT_DEFINED_TQENTRY
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#define TAILQ_ENTRY(type) \
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struct { \
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struct type *tqe_next; /* next element */ \
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struct type **tqe_prev; /* address of previous next element */ \
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}
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#endif /* !TAILQ_ENTRY */
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#ifndef RB_ENTRY
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#define _EVENT_DEFINED_RBENTRY
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#define RB_ENTRY(type) \
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struct { \
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struct type *rbe_left; /* left element */ \
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struct type *rbe_right; /* right element */ \
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struct type *rbe_parent; /* parent element */ \
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int rbe_color; /* node color */ \
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}
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#endif /* !RB_ENTRY */
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struct event {
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TAILQ_ENTRY (event) ev_next;
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TAILQ_ENTRY (event) ev_active_next;
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TAILQ_ENTRY (event) ev_signal_next;
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RB_ENTRY (event) ev_timeout_node;
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int ev_fd;
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short ev_events;
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short ev_ncalls;
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short *ev_pncalls; /* Allows deletes in callback */
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struct timeval ev_timeout;
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void (*ev_callback)(int, short, void *arg);
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void *ev_arg;
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int ev_res; /* result passed to event callback */
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int ev_flags;
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};
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#define EVENT_SIGNAL(ev) ev->ev_fd
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#define EVENT_FD(ev) ev->ev_fd
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#ifdef _EVENT_DEFINED_TQENTRY
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#undef TAILQ_ENTRY
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#undef _EVENT_DEFINED_TQENTRY
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#else
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TAILQ_HEAD (event_list, event);
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#endif /* _EVENT_DEFINED_TQENTRY */
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#ifdef _EVENT_DEFINED_RBENTRY
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#undef RB_ENTRY
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#undef _EVENT_DEFINED_RBENTRY
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#endif /* _EVENT_DEFINED_RBENTRY */
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struct eventop {
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char *name;
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void *(*init)(void);
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int (*add)(void *, struct event *);
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int (*del)(void *, struct event *);
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int (*recalc)(void *, int);
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int (*dispatch)(void *, struct timeval *);
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};
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#define TIMEOUT_DEFAULT {5, 0}
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void event_init(void);
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int event_dispatch(void);
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#define EVLOOP_ONCE 0x01
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#define EVLOOP_NONBLOCK 0x02
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int event_loop(int);
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int timeout_next(struct timeval *);
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void timeout_correct(struct timeval *);
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void timeout_process(void);
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#define evtimer_add(ev, tv) event_add(ev, tv)
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#define evtimer_set(ev, cb, arg) event_set(ev, -1, 0, cb, arg)
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#define evtimer_del(ev) event_del(ev)
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#define evtimer_pending(ev, tv) event_pending(ev, EV_TIMEOUT, tv)
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#define evtimer_initialized(ev) ((ev)->ev_flags & EVLIST_INIT)
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#define timeout_add(ev, tv) event_add(ev, tv)
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#define timeout_set(ev, cb, arg) event_set(ev, -1, 0, cb, arg)
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#define timeout_del(ev) event_del(ev)
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#define timeout_pending(ev, tv) event_pending(ev, EV_TIMEOUT, tv)
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#define timeout_initialized(ev) ((ev)->ev_flags & EVLIST_INIT)
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#define signal_add(ev, tv) event_add(ev, tv)
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#define signal_set(ev, x, cb, arg) \
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event_set(ev, x, EV_SIGNAL|EV_PERSIST, cb, arg)
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#define signal_del(ev) event_del(ev)
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#define signal_pending(ev, tv) event_pending(ev, EV_SIGNAL, tv)
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#define signal_initialized(ev) ((ev)->ev_flags & EVLIST_INIT)
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void event_set(struct event *, int, short, void (*)(int, short, void *), void *);
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int event_add(struct event *, struct timeval *);
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int event_del(struct event *);
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void event_active(struct event *, int, short);
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int event_pending(struct event *, short, struct timeval *);
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#define event_initialized(ev) ((ev)->ev_flags & EVLIST_INIT)
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#ifdef __cplusplus
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}
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#endif
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#endif /* _EVENT_H_ */
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