1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
|
/* GNU Objective C Runtime class related functions
Copyright (C) 1993, 1995, 1996, 2009 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/objc.h"
#include "objc/objc-api.h"
#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
class_create_instance (Class class)
{
return class_createInstance (class, 0);
}
/* Temporary, while we are including objc-api.h instead of runtime.h. */
#undef object_copy
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;
}
/*
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;
|
