ARCHelper.h

//
//  ARCHelper.h
//
//  Version 1.2.1
//
//  Created by Nick Lockwood on 05/01/2012.
//  Copyright 2012 Charcoal Design
//
//  Distributed under the permissive zlib license
//  Get the latest version from here:
//
//  https://gist.github.com/1563325
//


#ifndef AH_RETAIN

#if __has_feature(objc_arc)			// has ARC

#define AH_RETAIN(x) (x)
#define AH_RELEASE(x)
#define AH_AUTORELEASE(x) (x)
#define AH_SUPER_DEALLOC

#else								// no ARC

#define __AH_WEAK
#define AH_WEAK assign
#define AH_RETAIN(x) [(x) retain]
#define AH_RELEASE(x) [(x) release]
#define AH_AUTORELEASE(x) [(x) autorelease]
#define AH_SUPER_DEALLOC [super dealloc]

#endif	// __has_feature(objc_arc)

#endif	// AH_RETAIN



//  Weak reference support

#ifndef AH_WEAK

#if defined __IPHONE_OS_VERSION_MIN_REQUIRED

#if __IPHONE_OS_VERSION_MIN_REQUIRED > __IPHONE_4_3		// iOS

#define __AH_WEAK __weak
#define AH_WEAK weak

#else

#define __AH_WEAK __unsafe_unretained
#define AH_WEAK unsafe_unretained

#endif	// __IPHONE_OS_VERSION_MIN_REQUIRED > __IPHONE_4_3

#elif defined __MAC_OS_X_VERSION_MIN_REQUIRED

#if __MAC_OS_X_VERSION_MIN_REQUIRED > __MAC_10_6		// Mac

#define __AH_WEAK __weak
#define AH_WEAK weak

#else

#define __AH_WEAK __unsafe_unretained
#define AH_WEAK unsafe_unretained

#endif	// __MAC_OS_X_VERSION_MIN_REQUIRED > __MAC_10_6

#endif	//__MAC_OS_X_VERSION_MIN_REQUIRED

#endif	// AH_WEAK