1/*
2 * Block.h
3 *
4 * Copyright (c) 2008-2010 Apple Inc. All rights reserved.
5 *
6 * @APPLE_LLVM_LICENSE_HEADER@
7 *
8 */
9
10#ifndef _Block_H_
11#define _Block_H_
12
13#if !defined(BLOCK_EXPORT)
14# if defined(__cplusplus)
15# define BLOCK_EXPORT extern "C"
16# else
17# define BLOCK_EXPORT extern
18# endif
19#endif
20
21#include <Availability.h>
22#ifndef KERNEL
23#include <TargetConditionals.h>
24#endif /* KERNEL */
25
26#if __cplusplus
27extern "C" {
28#endif
29
30// Create a heap based copy of a Block or simply add a reference to an existing one.
31// This must be paired with Block_release to recover memory, even when running
32// under Objective-C Garbage Collection.
33BLOCK_EXPORT void *_Block_copy(const void *aBlock)
34__OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_3_2);
35
36// Lose the reference, and if heap based and last reference, recover the memory
37BLOCK_EXPORT void _Block_release(const void *aBlock)
38__OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_3_2);
39
40
41// Used by the compiler. Do not call this function yourself.
42BLOCK_EXPORT void _Block_object_assign(void *, const void *, const int)
43__OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_3_2);
44
45// Used by the compiler. Do not call this function yourself.
46BLOCK_EXPORT void _Block_object_dispose(const void *, const int)
47__OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_3_2);
48
49// Used by the compiler. Do not use these variables yourself.
50BLOCK_EXPORT void * _NSConcreteGlobalBlock[32]
51__OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_3_2);
52BLOCK_EXPORT void * _NSConcreteStackBlock[32]
53__OSX_AVAILABLE_STARTING(__MAC_10_6, __IPHONE_3_2);
54
55
56#if __cplusplus
57}
58#endif
59
60// Type correct macros
61
62#define Block_copy(...) ((__typeof(__VA_ARGS__))_Block_copy((const void *)(__VA_ARGS__)))
63#define Block_release(...) _Block_release((const void *)(__VA_ARGS__))
64
65
66#endif
67