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1/*2 * Block.h3 *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 documentation6 * 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 permit9 * persons to whom the Software is furnished to do so, subject to the following10 * conditions:11 * 12 * The above copyright notice and this permission notice shall be included in13 * all copies or substantial portions of the Software.14 * 15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE18 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER19 * 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 THE21 * 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# else32# define BLOCK_EXPORT extern33# endif34#endif35 36#if defined(__cplusplus)37extern "C" {38#endif39 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 running42 * under Objective-C Garbage Collection.43 */44BLOCK_EXPORT void *_Block_copy(const void *aBlock);45 46/* Lose the reference, and if heap based and last reference, recover the memory. */47BLOCK_EXPORT void _Block_release(const void *aBlock);48 49#if defined(__cplusplus)50}51#endif52 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#endif60