Annotation of embedaddon/libevent/event-internal.h, revision 1.1.1.1
1.1 misho 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: #ifndef _EVENT_INTERNAL_H_
28: #define _EVENT_INTERNAL_H_
29:
30: #ifdef __cplusplus
31: extern "C" {
32: #endif
33:
34: #include "config.h"
35: #include "min_heap.h"
36: #include "evsignal.h"
37:
38: struct eventop {
39: const char *name;
40: void *(*init)(struct event_base *);
41: int (*add)(void *, struct event *);
42: int (*del)(void *, struct event *);
43: int (*dispatch)(struct event_base *, void *, struct timeval *);
44: void (*dealloc)(struct event_base *, void *);
45: /* set if we need to reinitialize the event base */
46: int need_reinit;
47: };
48:
49: struct event_base {
50: const struct eventop *evsel;
51: void *evbase;
52: int event_count; /* counts number of total events */
53: int event_count_active; /* counts number of active events */
54:
55: int event_gotterm; /* Set to terminate loop */
56: int event_break; /* Set to terminate loop immediately */
57:
58: /* active event management */
59: struct event_list **activequeues;
60: int nactivequeues;
61:
62: /* signal handling info */
63: struct evsignal_info sig;
64:
65: struct event_list eventqueue;
66: struct timeval event_tv;
67:
68: struct min_heap timeheap;
69:
70: struct timeval tv_cache;
71: };
72:
73: /* Internal use only: Functions that might be missing from <sys/queue.h> */
74: #ifndef HAVE_TAILQFOREACH
75: #define TAILQ_FIRST(head) ((head)->tqh_first)
76: #define TAILQ_END(head) NULL
77: #define TAILQ_NEXT(elm, field) ((elm)->field.tqe_next)
78: #define TAILQ_FOREACH(var, head, field) \
79: for((var) = TAILQ_FIRST(head); \
80: (var) != TAILQ_END(head); \
81: (var) = TAILQ_NEXT(var, field))
82: #define TAILQ_INSERT_BEFORE(listelm, elm, field) do { \
83: (elm)->field.tqe_prev = (listelm)->field.tqe_prev; \
84: (elm)->field.tqe_next = (listelm); \
85: *(listelm)->field.tqe_prev = (elm); \
86: (listelm)->field.tqe_prev = &(elm)->field.tqe_next; \
87: } while (0)
88: #endif /* TAILQ_FOREACH */
89:
90: int _evsignal_set_handler(struct event_base *base, int evsignal,
91: void (*fn)(int));
92: int _evsignal_restore_handler(struct event_base *base, int evsignal);
93:
94: /* defined in evutil.c */
95: const char *evutil_getenv(const char *varname);
96:
97: #ifdef __cplusplus
98: }
99: #endif
100:
101: #endif /* _EVENT_INTERNAL_H_ */
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