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https://github.com/isc-projects/bind9.git
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87cafc5e70
Mostly, several functions that take pointers as arguments, almost always char * pointers, had those pointers qualified with "const". Those that returned pointers to previously const-qualified arguments had their return values qualified as const. Some structure members were qualified as const to retain that attribute from the variables from which they were assigned. The macro DE_CONST was added to isc/util.h to deal with a handful of very special places where something is qualified as const but really needs to have its const qualifier removed. Also cleaned up a few places where variable names clashed with reserved identifiers. (Which mostly works fine, but strictly speaking is undefined by the standard.) Minor other ISC style cleanups.
87 lines
2.4 KiB
C
87 lines
2.4 KiB
C
/*
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* Copyright (C) 1998, 1999, 2000 Internet Software Consortium.
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*
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* Permission to use, copy, modify, and 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 INTERNET SOFTWARE CONSORTIUM DISCLAIMS
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* ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
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* CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
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* DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
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* PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
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* ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
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* SOFTWARE.
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*/
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/*
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* 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_t *mctx = event->ev_destroy_arg;
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isc_mem_put(mctx, 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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if (size < sizeof (struct isc_event))
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return (NULL);
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if (action == NULL)
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return (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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