Return to event-internal.h CVS log

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

libevent

    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_ */