ObjFW
OFBlock.h
1 /*
2  * Copyright (c) 2008-2023 Jonathan Schleifer <js@nil.im>
3  *
4  * All rights reserved.
5  *
6  * This file is part of ObjFW. It may be distributed under the terms of the
7  * Q Public License 1.0, which can be found in the file LICENSE.QPL included in
8  * the packaging of this file.
9  *
10  * Alternatively, it may be distributed under the terms of the GNU General
11  * Public License, either version 2 or 3, which can be found in the file
12  * LICENSE.GPLv2 or LICENSE.GPLv3 respectively included in the packaging of this
13  * file.
14  */
15 
16 #import "OFObject.h"
17 
18 OF_ASSUME_NONNULL_BEGIN
19 
25 @interface OFBlock: OFObject
26 + (instancetype)alloc OF_UNAVAILABLE;
27 - (instancetype)init OF_UNAVAILABLE;
28 @end
29 
30 OF_SUBCLASSING_RESTRICTED
31 @interface OFStackBlock: OFBlock
32 @end
33 
34 OF_SUBCLASSING_RESTRICTED
35 @interface OFGlobalBlock: OFBlock
36 @end
37 
38 OF_SUBCLASSING_RESTRICTED
39 @interface OFMallocBlock: OFBlock
40 @end
41 
42 #ifdef __cplusplus
43 extern "C" {
44 #endif
45 extern void *_Nullable _Block_copy(const void *_Nullable);
46 extern void _Block_release(const void *_Nullable);
47 
48 # if defined(OF_WINDOWS) && \
49  (defined(OF_NO_SHARED) || defined(OF_COMPILING_OBJFW))
50 /*
51  * Clang has implicit declarations for these, but they are dllimport. When
52  * compiling ObjFW itself or using it as a static library, these need to be
53  * dllexport. Interestingly, this still works when using it as a shared library.
54  */
55 extern __declspec(dllexport) struct objc_class _NSConcreteStackBlock;
56 extern __declspec(dllexport) struct objc_class _NSConcreteGlobalBlock;
57 extern __declspec(dllexport) void _Block_object_assign(void *, const void *,
58  const int);
59 extern __declspec(dllexport) void _Block_object_dispose(const void *,
60  const int);
61 # endif
62 #ifdef __cplusplus
63 }
64 #endif
65 
66 #ifndef Block_copy
67 # define Block_copy(...) \
68  ((__typeof__(__VA_ARGS__))_Block_copy((const void *)(__VA_ARGS__)))
69 #endif
70 #ifndef Block_release
71 # define Block_release(...) _Block_release((const void *)(__VA_ARGS__))
72 #endif
73 
74 OF_ASSUME_NONNULL_END
The root class for all other classes inside ObjFW.
Definition: OFObject.h:686
A pointer to a class.
Definition: private.h:33
instancetype init()
Initializes an already allocated object.
Definition: OFObject.m:585
instancetype alloc()
Allocates memory for an instance of the class and sets up the memory pool for the object...
Definition: OFObject.m:437
The class for all blocks, since all blocks are also objects.
Definition: OFBlock.h:25