/* GNU Objective C Runtime class related functions
- Copyright (C) 1993, 1995, 1996 Free Software Foundation, Inc.
+ Copyright (C) 1993, 1995, 1996, 2009, 2010 Free Software Foundation, Inc.
Contributed by Kresten Krab Thorup
-This file is part of GNU CC.
+This file is part of GCC.
-GNU CC is free software; you can redistribute it and/or modify it under the
+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 2, or (at your option) any later version.
+Foundation; either version 3, or (at your option) any later version.
-GNU CC is distributed in the hope that it will be useful, but WITHOUT ANY
+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.
-You should have received a copy of the GNU General Public License along with
-GNU CC; see the file COPYING. If not, write to the Free Software
-Foundation, 59 Temple Place - Suite 330,
-Boston, MA 02111-1307, USA. */
+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.
-/* As a special exception, if you link this library with files compiled with
- GCC to produce an executable, this does not cause the resulting executable
- to be covered by the GNU General Public License. This exception does not
- however invalidate any other reasons why the executable file might be
- covered by the GNU General Public License. */
+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 "tconfig.h" /* include defs of bzero for target */
-#include "objc.h"
-#include "runtime.h" /* the kitchen sink */
+#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.h>
+# include <gc_typed.h>
#endif
-id __objc_object_alloc(Class);
-id __objc_object_dispose(id);
-id __objc_object_copy(id);
-
-id (*_objc_object_alloc)(Class) = __objc_object_alloc; /* !T:SINGLE */
-id (*_objc_object_dispose)(id) = __objc_object_dispose; /* !T:SINGLE */
-id (*_objc_object_copy)(id) = __objc_object_copy; /* !T:SINGLE */
-
+/* FIXME: The semantics of extraBytes are not really clear. */
+inline
id
-class_create_instance(Class class)
+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,
- class->gc_object_type);
+ 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 = (*_objc_object_alloc)(class);
+ if (CLS_ISCLASS (class))
+ new = (id) objc_calloc (class->instance_size + extraBytes, 1);
#endif
- if (new!=nil)
+ if (new != nil)
{
- memset (new, 0, class->instance_size);
+ /* 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)
+class_create_instance (Class class)
{
- if ((object!=nil)&&CLS_ISCLASS(object->class_pointer))
- return (*_objc_object_copy)(object);
+ return class_createInstance (class, 0);
+}
+
+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)
+object_dispose (id object)
{
- if ((object!=nil)&&CLS_ISCLASS(object->class_pointer))
+ if ((object != nil) && CLS_ISCLASS (object->class_pointer))
{
- if (_objc_object_dispose)
- (*_objc_object_dispose)(object);
- else
- objc_free(object);
+ /* 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;
}
-id __objc_object_alloc(Class class)
+const char *
+object_getClassName (id object)
{
- return (id)objc_malloc(class->instance_size);
+ if (object != nil)
+ return object->class_pointer->name;
+ else
+ return "Nil";
}
-id __objc_object_dispose(id object)
+Class
+object_setClass (id object, Class class_)
{
- objc_free(object);
- return 0;
-}
+ if (object == nil)
+ return Nil;
+ else
+ {
+ Class old_class = object->class_pointer;
-id __objc_object_copy(id object)
-{
- id copy = class_create_instance(object->class_pointer);
- memcpy(copy, object, object->class_pointer->instance_size);
- return copy;
+ object->class_pointer = class_;
+ return old_class;
+ }
}
-
+/* Hook functions for memory allocation and disposal. Deprecated and
+ currently unused. */
+id (*_objc_object_alloc) (Class) = 0;
+id (*_objc_object_dispose) (id) = 0;
+id (*_objc_object_copy) (id) = 0;
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