ARCMacro.h: Enables compilation both in ARC and non-ARC

ARCMacro.h

/*
 * ARCMacro.h  1.1 2012/05/29  https://gist.github.com/2823399
 * 
 * ARCMacro.h realizes coexistence of both the ARC (Automatic 
 * Reference Counting) mode and the Non-ARC mode of Objective-C 
 * in the same source code. This macro works for iOS and Mac OS X.
 *
 * This is a by-product of joint research by AIST and The University of Ryukyu.
 * HIRANO Satoshi (AIST), NAKAMURA Morikazu (U. Ryukyu) and GUAN Senlin (U. Ryukyu)
 * 
 * Author: HIRANO Satoshi (AIST, Japan) on 2011/11/14
 * Copyright 2011-2012 National Institute of Advanced Industrial Science 
 *      and Technology (AIST), Japan.  Apache License 2.0.
 *
 * Usage:
 *    #import "ARCMacro.h"
 *    [o1 RETAIN];
 *    o2 = [[o3 RETAIN] AUTORELEASE];
 *    [super DEALLOC];
 */

#if __has_feature(objc_arc)
#define RETAIN self
#define AUTORELEASE self
#define RELEASE self
#define DEALLOC self
#else
#define RETAIN retain
#define AUTORELEASE autorelease
#define RELEASE release
#define DEALLOC dealloc
#endif

ifndef MB_STRONG

if __has_feature(objc_arc)

#define MB_STRONG strong

else

#define MB_STRONG retain

endif

endif

ifndef MB_WEAK

if __has_feature(objc_arc_weak)

#define MB_WEAK weak

elif __has_feature(objc_arc)

#define MB_WEAK unsafe_unretained

else

#define MB_WEAK assign

endif

endif

if NS_BLOCKS_AVAILABLE

typedef void (^G7UIProgressHUDCompletionBlock)();

endif

if __has_feature(objc_arc)

#define MB_AUTORELEASE(exp) exp
#define MB_RELEASE(exp) exp
#define MB_RETAIN(exp) exp

else

#define MB_AUTORELEASE(exp) [exp autorelease]
#define MB_RELEASE(exp) [exp release]
#define MB_RETAIN(exp) [exp retain]

endif

if !__has_feature(objc_arc)

[xxx release];

if NS_BLOCKS_AVAILABLE

[xxxBlock release];

endif

[super dealloc];

endif