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/*
* Block.h
*
* Copyright 2008-2010 Apple, Inc. Permission is hereby granted, free of charge,
* to any person obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without restriction,
* including without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to permit
* persons to whom the Software is furnished to do so, subject to the following
* conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
*/
#ifndef _BLOCK_H_
#define _BLOCK_H_
#if !defined(BLOCK_EXPORT)
# if defined(__cplusplus)
# define BLOCK_EXPORT extern "C"
# else
# define BLOCK_EXPORT extern
# endif
#endif
#if defined(__cplusplus)
extern "C" {
#endif
/* Create a heap based copy of a Block or simply add a reference to an existing one.
* This must be paired with Block_release to recover memory, even when running
* under Objective-C Garbage Collection.
*/
BLOCK_EXPORT void *_Block_copy(const void *aBlock);
/* Lose the reference, and if heap based and last reference, recover the memory. */
BLOCK_EXPORT void _Block_release(const void *aBlock);
#if defined(__cplusplus)
}
#endif
/* Type correct macros. */
#define Block_copy(...) ((__typeof(__VA_ARGS__))_Block_copy((const void *)(__VA_ARGS__)))
#define Block_release(...) _Block_release((const void *)(__VA_ARGS__))
#endif
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