Return to event-internal.h CVS log

Up to [ELWIX - Embedded LightWeight unIX -] / embedaddon / libevent

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_ */