lib/isc/ondestroy.c

	ondestroy.c revision 9c3531d72aeaad6c5f01efe6a1c82023e1379e4d
63dd46733010bb9622810faa17d88c3e3c28b730Mark Andrews/*
63dd46733010bb9622810faa17d88c3e3c28b730Mark Andrews * Copyright (C) 2000  Internet Software Consortium.
63dd46733010bb9622810faa17d88c3e3c28b730Mark Andrews *
63dd46733010bb9622810faa17d88c3e3c28b730Mark Andrews * Permission to use, copy, modify, and distribute this software for any
63dd46733010bb9622810faa17d88c3e3c28b730Mark Andrews * purpose with or without fee is hereby granted, provided that the above
63dd46733010bb9622810faa17d88c3e3c28b730Mark Andrews * copyright notice and this permission notice appear in all copies.
63dd46733010bb9622810faa17d88c3e3c28b730Mark Andrews *
63dd46733010bb9622810faa17d88c3e3c28b730Mark Andrews * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS
63dd46733010bb9622810faa17d88c3e3c28b730Mark Andrews * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
63dd46733010bb9622810faa17d88c3e3c28b730Mark Andrews * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
63dd46733010bb9622810faa17d88c3e3c28b730Mark Andrews * CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
63dd46733010bb9622810faa17d88c3e3c28b730Mark Andrews * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
63dd46733010bb9622810faa17d88c3e3c28b730Mark Andrews * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
63dd46733010bb9622810faa17d88c3e3c28b730Mark Andrews * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
63dd46733010bb9622810faa17d88c3e3c28b730Mark Andrews * SOFTWARE.
63dd46733010bb9622810faa17d88c3e3c28b730Mark Andrews */
63dd46733010bb9622810faa17d88c3e3c28b730Mark Andrews
63dd46733010bb9622810faa17d88c3e3c28b730Mark Andrews/* $Id: ondestroy.c,v 1.7 2000/06/22 21:57:05 tale Exp $ */
63dd46733010bb9622810faa17d88c3e3c28b730Mark Andrews
63dd46733010bb9622810faa17d88c3e3c28b730Mark Andrews#include <config.h>
63dd46733010bb9622810faa17d88c3e3c28b730Mark Andrews
63dd46733010bb9622810faa17d88c3e3c28b730Mark Andrews#include <stddef.h>
63dd46733010bb9622810faa17d88c3e3c28b730Mark Andrews
#include <isc/event.h>
#include <isc/magic.h>
#include <isc/ondestroy.h>
#include <isc/task.h>
#include <isc/util.h>

#define ONDESTROY_MAGIC     0x44655374 /* DeSt */
#define VALID_ONDESTROY(s)  ISC_MAGIC_VALID(s, ONDESTROY_MAGIC)

void
isc_ondestroy_init(isc_ondestroy_t *ondest) {
    ondest->magic = ONDESTROY_MAGIC;
    ISC_LIST_INIT(ondest->events);
}

isc_result_t
isc_ondestroy_register(isc_ondestroy_t *ondest, isc_task_t *task,
               isc_event_t **eventp)
{
    isc_event_t *theevent;
    isc_task_t *thetask = NULL;

    REQUIRE(VALID_ONDESTROY(ondest));
    REQUIRE(task != NULL);
    REQUIRE(eventp != NULL);

    theevent = *eventp;

    REQUIRE(theevent != NULL);

    isc_task_attach(task, &thetask);

    theevent->ev_sender = thetask;

    ISC_LIST_APPEND(ondest->events, theevent, ev_link);

    return (ISC_R_SUCCESS);
}

void
isc_ondestroy_notify(isc_ondestroy_t *ondest, void *sender) {
    isc_event_t *eventp;
    isc_task_t *task;

    REQUIRE(VALID_ONDESTROY(ondest));

    eventp = ISC_LIST_HEAD(ondest->events);
    while (eventp != NULL) {
        ISC_LIST_UNLINK(ondest->events, eventp, ev_link);

        task = eventp->ev_sender;
        eventp->ev_sender = sender;

        isc_task_sendanddetach(&task, &eventp);

        eventp = ISC_LIST_HEAD(ondest->events);
    }
}