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Diffstat (limited to 'base/memory/singleton_objc.h')
-rw-r--r-- | base/memory/singleton_objc.h | 60 |
1 files changed, 0 insertions, 60 deletions
diff --git a/base/memory/singleton_objc.h b/base/memory/singleton_objc.h deleted file mode 100644 index 6df3f7757e..0000000000 --- a/base/memory/singleton_objc.h +++ /dev/null @@ -1,60 +0,0 @@ -// Copyright (c) 2011 The Chromium Authors. All rights reserved. -// Use of this source code is governed by a BSD-style license that can be -// found in the LICENSE file. - -// Support for using the Singleton<T> pattern with Objective-C objects. A -// SingletonObjC is the same as a Singleton, except the default traits are -// appropriate for Objective-C objects. A typical Objective-C object of type -// NSExampleType can be maintained as a singleton and accessed with: -// -// NSExampleType* exampleSingleton = SingletonObjC<NSExampleType>::get(); -// -// The first time this is used, it will create exampleSingleton as the result -// of [[NSExampleType alloc] init]. Subsequent calls will return the same -// NSExampleType* object. The object will be released by calling -// -[NSExampleType release] when Singleton's atexit routines run -// (see singleton.h). -// -// For Objective-C objects initialized through means other than the -// no-parameter -init selector, DefaultSingletonObjCTraits may be extended -// as needed: -// -// struct FooSingletonTraits : public DefaultSingletonObjCTraits<Foo> { -// static Foo* New() { -// return [[Foo alloc] initWithName:@"selecty"]; -// } -// }; -// ... -// Foo* widgetSingleton = SingletonObjC<Foo, FooSingletonTraits>::get(); - -#ifndef BASE_MEMORY_SINGLETON_OBJC_H_ -#define BASE_MEMORY_SINGLETON_OBJC_H_ - -#import <Foundation/Foundation.h> -#include "base/memory/singleton.h" - -// Singleton traits usable to manage traditional Objective-C objects, which -// are instantiated by sending |alloc| and |init| messages, and are deallocated -// in a memory-managed environment when their retain counts drop to 0 by -// sending |release| messages. -template<typename Type> -struct DefaultSingletonObjCTraits : public DefaultSingletonTraits<Type> { - static Type* New() { - return [[Type alloc] init]; - } - - static void Delete(Type* object) { - [object release]; - } -}; - -// Exactly like Singleton, but without the DefaultSingletonObjCTraits as the -// default trait class. This makes it straightforward for Objective-C++ code -// to hold Objective-C objects as singletons. -template<typename Type, - typename Traits = DefaultSingletonObjCTraits<Type>, - typename DifferentiatingType = Type> -class SingletonObjC : public Singleton<Type, Traits, DifferentiatingType> { -}; - -#endif // BASE_MEMORY_SINGLETON_OBJC_H_ |