87 lines
2.5 KiB
C
87 lines
2.5 KiB
C
/*
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* Copyright (C) 2004, 2005, 2007 Internet Systems Consortium, Inc. ("ISC")
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* Copyright (C) 1998-2001 Internet Software Consortium.
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
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* REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
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* AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
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* INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
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* LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
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* OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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* PERFORMANCE OF THIS SOFTWARE.
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*/
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/* $Id: event.c,v 1.21 2007/06/19 23:47:17 tbox Exp $ */
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/*!
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* \file
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* \author Principal Author: Bob Halley
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*/
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#include <config.h>
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#include <isc/event.h>
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#include <isc/mem.h>
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#include <isc/util.h>
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/***
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*** Events.
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***/
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static void
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destroy(isc_event_t *event) {
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isc_mem_put(event->ev_destroy_arg, event, event->ev_size);
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}
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isc_event_t *
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isc_event_allocate(isc_mem_t *mctx, void *sender, isc_eventtype_t type,
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isc_taskaction_t action, const void *arg, size_t size)
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{
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isc_event_t *event;
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void *deconst_arg;
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REQUIRE(size >= sizeof(struct isc_event));
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REQUIRE(action != NULL);
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event = isc_mem_get(mctx, size);
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if (event == NULL)
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return (NULL);
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/*
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* Removing the const attribute from "arg" is the best of two
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* evils here. If the event->ev_arg member is made const, then
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* it affects a great many users of the task/event subsystem
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* which are not passing in an "arg" which starts its life as
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* const. Changing isc_event_allocate() and isc_task_onshutdown()
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* to not have "arg" prototyped as const (which is quite legitimate,
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* because neither of those functions modify arg) can cause
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* compiler whining anytime someone does want to use a const
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* arg that they themselves never modify, such as with
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* gcc -Wwrite-strings and using a string "arg".
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*/
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DE_CONST(arg, deconst_arg);
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ISC_EVENT_INIT(event, size, 0, NULL, type, action, deconst_arg,
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sender, destroy, mctx);
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return (event);
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}
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void
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isc_event_free(isc_event_t **eventp) {
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isc_event_t *event;
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REQUIRE(eventp != NULL);
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event = *eventp;
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REQUIRE(event != NULL);
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if (event->ev_destroy != NULL)
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(event->ev_destroy)(event);
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*eventp = NULL;
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}
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