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//
// SynthesizeSingleton.h
// CocoaWithLove
//
// Created by Matt Gallagher on 20/10/08.
// Copyright 2009 Matt Gallagher. All rights reserved.
//
// Permission is given to use this source code file without charge in any
// project, commercial or otherwise, entirely at your risk, with the condition
// that any redistribution (in part or whole) of source code must retain
// this copyright and permission notice. Attribution in compiled projects is
// appreciated but not required.
//
#if __has_feature(objc_arc) // ARC Version
#define SYNTHESIZE_SINGLETON_FOR_CLASS(classname) \
\
+ (classname *)sharedInstance\
{\
static classname *shared##classname = nil;\
static dispatch_once_t onceToken;\
dispatch_once(&onceToken, ^{\
shared##classname = [[self alloc] init];\
});\
return shared##classname;\
}
#else // Non-ARC Version
#define SYNTHESIZE_SINGLETON_FOR_CLASS(classname) \
static classname *shared##classname = nil; \
+ (classname *)sharedInstance \
{ \
@synchronized(self) \
{ \
if (shared##classname == nil) \
{ \
shared##classname = [[self alloc] init]; \
} \
} \
return shared##classname; \
} \
\
+ (id)allocWithZone:(NSZone *)zone \
{ \
@synchronized(self) \
{ \
if (shared##classname == nil) \
{ \
shared##classname = [super allocWithZone:zone]; \
return shared##classname; \
} \
} \
return nil; \
} \
- (id)copyWithZone:(NSZone *)zone \
{ \
return self; \
} \
- (id)retain \
{ \
return self; \
} \
- (NSUInteger)retainCount \
{ \
return NSUIntegerMax; \
} \
- (oneway void)release \
{ \
} \
- (id)autorelease \
{ \
return self; \
}
#endif