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1 | /* |
2 | * Block.h | |
3 | * | |
4 | * Copyright 2008-2010 Apple, Inc. Permission is hereby granted, free of charge, | |
5 | * to any person obtaining a copy of this software and associated documentation | |
6 | * files (the "Software"), to deal in the Software without restriction, | |
7 | * including without limitation the rights to use, copy, modify, merge, publish, | |
8 | * distribute, sublicense, and/or sell copies of the Software, and to permit | |
9 | * persons to whom the Software is furnished to do so, subject to the following | |
10 | * conditions: | |
11 | * | |
12 | * The above copyright notice and this permission notice shall be included in | |
13 | * all copies or substantial portions of the Software. | |
14 | * | |
15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
18 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
19 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
20 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
21 | * SOFTWARE. | |
22 | * | |
23 | */ | |
24 | ||
25 | #ifndef _BLOCK_H_ | |
26 | #define _BLOCK_H_ | |
27 | ||
28 | #if !defined(BLOCK_EXPORT) | |
29 | # if defined(__cplusplus) | |
30 | # define BLOCK_EXPORT extern "C" | |
31 | # else | |
32 | # define BLOCK_EXPORT extern | |
33 | # endif | |
34 | #endif | |
35 | ||
36 | #if defined(__cplusplus) | |
37 | extern "C" { | |
38 | #endif | |
39 | ||
40 | /* Create a heap based copy of a Block or simply add a reference to an existing one. | |
41 | * This must be paired with Block_release to recover memory, even when running | |
42 | * under Objective-C Garbage Collection. | |
43 | */ | |
44 | BLOCK_EXPORT void *_Block_copy(const void *aBlock); | |
45 | ||
46 | /* Lose the reference, and if heap based and last reference, recover the memory. */ | |
47 | BLOCK_EXPORT void _Block_release(const void *aBlock); | |
48 | ||
49 | #if defined(__cplusplus) | |
50 | } | |
51 | #endif | |
52 | ||
53 | /* Type correct macros. */ | |
54 | ||
55 | #define Block_copy(...) ((__typeof(__VA_ARGS__))_Block_copy((const void *)(__VA_ARGS__))) | |
56 | #define Block_release(...) _Block_release((const void *)(__VA_ARGS__)) | |
57 | ||
58 | ||
59 | #endif |