1 /* 2 * Copyright (c) 2000-2004 Niels Provos <provos (at) 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_ */ 102
