/contrib/bind9/lib/isc/event.c
https://bitbucket.org/freebsd/freebsd-head/ · C · 88 lines · 35 code · 17 blank · 36 comment · 7 complexity · 012f1c03f9f3965731def1829f36a877 MD5 · raw file
- /*
- * Copyright (C) 2004, 2005, 2007 Internet Systems Consortium, Inc. ("ISC")
- * Copyright (C) 1998-2001 Internet Software Consortium.
- *
- * Permission to use, copy, modify, and/or distribute this software for any
- * purpose with or without fee is hereby granted, provided that the above
- * copyright notice and this permission notice appear in all copies.
- *
- * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
- * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
- * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
- * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
- * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
- * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
- * PERFORMANCE OF THIS SOFTWARE.
- */
- /* $Id: event.c,v 1.21 2007/06/19 23:47:17 tbox Exp $ */
- /*!
- * \file
- * \author Principal Author: Bob Halley
- */
- #include <config.h>
- #include <isc/event.h>
- #include <isc/mem.h>
- #include <isc/util.h>
- /***
- *** Events.
- ***/
- static void
- destroy(isc_event_t *event) {
- isc_mem_t *mctx = event->ev_destroy_arg;
- isc_mem_put(mctx, event, event->ev_size);
- }
- isc_event_t *
- isc_event_allocate(isc_mem_t *mctx, void *sender, isc_eventtype_t type,
- isc_taskaction_t action, const void *arg, size_t size)
- {
- isc_event_t *event;
- void *deconst_arg;
- REQUIRE(size >= sizeof(struct isc_event));
- REQUIRE(action != NULL);
- event = isc_mem_get(mctx, size);
- if (event == NULL)
- return (NULL);
- /*
- * Removing the const attribute from "arg" is the best of two
- * evils here. If the event->ev_arg member is made const, then
- * it affects a great many users of the task/event subsystem
- * which are not passing in an "arg" which starts its life as
- * const. Changing isc_event_allocate() and isc_task_onshutdown()
- * to not have "arg" prototyped as const (which is quite legitimate,
- * because neither of those functions modify arg) can cause
- * compiler whining anytime someone does want to use a const
- * arg that they themselves never modify, such as with
- * gcc -Wwrite-strings and using a string "arg".
- */
- DE_CONST(arg, deconst_arg);
- ISC_EVENT_INIT(event, size, 0, NULL, type, action, deconst_arg,
- sender, destroy, mctx);
- return (event);
- }
- void
- isc_event_free(isc_event_t **eventp) {
- isc_event_t *event;
- REQUIRE(eventp != NULL);
- event = *eventp;
- REQUIRE(event != NULL);
- if (event->ev_destroy != NULL)
- (event->ev_destroy)(event);
- *eventp = NULL;
- }