1/*	$NetBSD: event-internal.h,v 1.1.1.1 2009/11/02 10:00:53 plunky Exp $	*/
2/*
3 * Copyright (c) 2000-2004 Niels Provos <provos@citi.umich.edu>
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 * 3. The name of the author may not be used to endorse or promote products
15 *    derived from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28#ifndef _EVENT_INTERNAL_H_
29#define _EVENT_INTERNAL_H_
30
31#ifdef __cplusplus
32extern "C" {
33#endif
34
35#include "config.h"
36#include "min_heap.h"
37#include "evsignal.h"
38
39struct eventop {
40	const char *name;
41	void *(*init)(struct event_base *);
42	int (*add)(void *, struct event *);
43	int (*del)(void *, struct event *);
44	int (*dispatch)(struct event_base *, void *, struct timeval *);
45	void (*dealloc)(struct event_base *, void *);
46	/* set if we need to reinitialize the event base */
47	int need_reinit;
48};
49
50struct event_base {
51	const struct eventop *evsel;
52	void *evbase;
53	int event_count;		/* counts number of total events */
54	int event_count_active;	/* counts number of active events */
55
56	int event_gotterm;		/* Set to terminate loop */
57	int event_break;		/* Set to terminate loop immediately */
58
59	/* active event management */
60	struct event_list **activequeues;
61	int nactivequeues;
62
63	/* signal handling info */
64	struct evsignal_info sig;
65
66	struct event_list eventqueue;
67	struct timeval event_tv;
68
69	struct min_heap timeheap;
70
71	struct timeval tv_cache;
72};
73
74/* Internal use only: Functions that might be missing from <sys/queue.h> */
75#ifndef HAVE_TAILQFOREACH
76#define	TAILQ_FIRST(head)		((head)->tqh_first)
77#define	TAILQ_END(head)			NULL
78#define	TAILQ_NEXT(elm, field)		((elm)->field.tqe_next)
79#define TAILQ_FOREACH(var, head, field)					\
80	for((var) = TAILQ_FIRST(head);					\
81	    (var) != TAILQ_END(head);					\
82	    (var) = TAILQ_NEXT(var, field))
83#define	TAILQ_INSERT_BEFORE(listelm, elm, field) do {			\
84	(elm)->field.tqe_prev = (listelm)->field.tqe_prev;		\
85	(elm)->field.tqe_next = (listelm);				\
86	*(listelm)->field.tqe_prev = (elm);				\
87	(listelm)->field.tqe_prev = &(elm)->field.tqe_next;		\
88} while (0)
89#endif /* TAILQ_FOREACH */
90
91int _evsignal_set_handler(struct event_base *base, int evsignal,
92			  void (*fn)(int));
93int _evsignal_restore_handler(struct event_base *base, int evsignal);
94
95#ifdef __cplusplus
96}
97#endif
98
99#endif /* _EVENT_INTERNAL_H_ */
100