Viewing file: objects.c (3.24 KB) -rw-r--r-- Select action/file-type: (+) | (+) | (+) | Code (+) | Session (+) | (+) | SDB (+) | (+) | (+) | (+) | (+) | (+) |
/* GNU Objective C Runtime class related functions Copyright (C) 1993-2022 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; } }
|