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/* GNU Objective C Runtime class related functions
Copyright (C) 1993-2018 Free Software Foundation, Inc.
Contributed by Kresten Krab Thorup
This file is part of GCC.
GCC is free software; you can redistribute it and/or modify it under the
terms of the GNU General Public License as published by the Free Software
Foundation; either version 3, or (at your option) any later version.
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
details.
Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.
You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
<http://www.gnu.org/licenses/>. */
#include "objc-private/common.h"
#include "objc/runtime.h"
#include "objc/thr.h" /* Required by objc-private/runtime.h. */
#include "objc-private/module-abi-8.h" /* For CLS_ISCLASS and similar. */
#include "objc-private/runtime.h" /* the kitchen sink */
#include <string.h> /* For memcpy() */
#if OBJC_WITH_GC
# include <gc/gc.h>
# include <gc/gc_typed.h>
#endif
/* FIXME: The semantics of extraBytes are not really clear. */
inline
id
class_createInstance (Class class, size_t extraBytes)
{
id new = nil;
#if OBJC_WITH_GC
if (CLS_ISCLASS (class))
new = (id) GC_malloc_explicitly_typed (class->instance_size + extraBytes,
(GC_descr)class->gc_object_type);
#else
if (CLS_ISCLASS (class))
new = (id) objc_calloc (class->instance_size + extraBytes, 1);
#endif
if (new != nil)
{
/* There is no need to zero the memory, since both
GC_malloc_explicitly_typed and objc_calloc return zeroed
memory. */
new->class_pointer = class;
}
/* TODO: Invoke C++ constructors on all appropriate C++ instance
variables of the new object. */
return new;
}
/* Traditional GNU Objective-C Runtime API. */
id
object_copy (id object, size_t extraBytes)
{
if ((object != nil) && CLS_ISCLASS (object->class_pointer))
{
/* TODO: How should it work with C++ constructors ? */
id copy = class_createInstance (object->class_pointer, extraBytes);
memcpy (copy, object, object->class_pointer->instance_size + extraBytes);
return copy;
}
else
return nil;
}
id
object_dispose (id object)
{
if ((object != nil) && CLS_ISCLASS (object->class_pointer))
{
/* TODO: Invoke C++ destructors on all appropriate C++ instance
variables. But what happens with the garbage collector ?
Would object_dispose() be ever called in that case ? */
objc_free (object);
}
return nil;
}
const char *
object_getClassName (id object)
{
if (object != nil)
return object->class_pointer->name;
else
return "Nil";
}
Class
object_setClass (id object, Class class_)
{
if (object == nil)
return Nil;
else
{
Class old_class = object->class_pointer;
object->class_pointer = class_;
return old_class;
}
}
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