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 60