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[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [libobjc/] [objects.c] - Rev 830
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/* GNU Objective C Runtime class related functions Copyright (C) 1993, 1995, 1996, 2009, 2010 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.h> # include <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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