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 32 extern "C" { 33 #endif 34 35 #include "config.h" 36 #include "min_heap.h" 37 #include "evsignal.h" 38 39 struct 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 50 struct 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 91 int _evsignal_set_handler(struct event_base *base, int evsignal, 92 void (*fn)(int)); 93 int _evsignal_restore_handler(struct event_base *base, int evsignal); 94 95 #ifdef __cplusplus 96 } 97 #endif 98 99 #endif /* _EVENT_INTERNAL_H_ */ 100