| 1 | /* |
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| 2 | * Block.h |
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| 3 | * |
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| 4 | * Copyright 2008-2010 Apple, Inc. Permission is hereby granted, free of charge, |
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| 5 | * to any person obtaining a copy of this software and associated documentation |
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| 6 | * files (the "Software"), to deal in the Software without restriction, |
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| 7 | * including without limitation the rights to use, copy, modify, merge, publish, |
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| 8 | * distribute, sublicense, and/or sell copies of the Software, and to permit |
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| 9 | * persons to whom the Software is furnished to do so, subject to the following |
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| 10 | * conditions: |
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| 11 | * |
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| 12 | * The above copyright notice and this permission notice shall be included in |
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| 13 | * all copies or substantial portions of the Software. |
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| 14 | * |
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| 15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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| 16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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| 17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
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| 18 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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| 19 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
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| 20 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
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| 21 | * SOFTWARE. |
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| 22 | * |
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| 23 | */ |
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| 24 | |
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| 25 | #ifndef _BLOCK_H_ |
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| 26 | #define _BLOCK_H_ |
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| 27 | |
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| 28 | #if !defined(BLOCK_EXPORT) |
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| 29 | # if defined(__cplusplus) |
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| 30 | # define BLOCK_EXPORT extern "C" |
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| 31 | # else |
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| 32 | # define BLOCK_EXPORT extern |
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| 33 | # endif |
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| 34 | #endif |
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| 35 | |
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| 36 | #if defined(__cplusplus) |
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| 37 | extern "C" { |
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| 38 | #endif |
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| 39 | |
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| 40 | /* Create a heap based copy of a Block or simply add a reference to an existing one. |
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| 41 | * This must be paired with Block_release to recover memory, even when running |
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| 42 | * under Objective-C Garbage Collection. |
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| 43 | */ |
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| 44 | BLOCK_EXPORT void *_Block_copy(const void *aBlock); |
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| 45 | |
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| 46 | /* Lose the reference, and if heap based and last reference, recover the memory. */ |
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| 47 | BLOCK_EXPORT void _Block_release(const void *aBlock); |
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| 48 | |
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| 49 | #if defined(__cplusplus) |
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| 50 | } |
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| 51 | #endif |
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| 52 | |
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| 53 | /* Type correct macros. */ |
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| 54 | |
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| 55 | #define Block_copy(...) ((__typeof(__VA_ARGS__))_Block_copy((const void *)(__VA_ARGS__))) |
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| 56 | #define Block_release(...) _Block_release((const void *)(__VA_ARGS__)) |
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| 57 | |
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| 58 | |
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| 59 | #endif |
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| 60 | |
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