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Annotation of embedaddon/libevent/event-internal.h, revision 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_ */