| // Copyright (c) 2012 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. |
| |
| #ifndef BASE_MAC_SCOPED_CFTYPEREF_H_ |
| #define BASE_MAC_SCOPED_CFTYPEREF_H_ |
| |
| #include <CoreFoundation/CoreFoundation.h> |
| |
| #include "base/mac/scoped_typeref.h" |
| |
| namespace base { |
| |
| // ScopedCFTypeRef<> is patterned after scoped_ptr<>, but maintains ownership |
| // of a CoreFoundation object: any object that can be represented as a |
| // CFTypeRef. Style deviations here are solely for compatibility with |
| // scoped_ptr<>'s interface, with which everyone is already familiar. |
| // |
| // By default, ScopedCFTypeRef<> takes ownership of an object (in the |
| // constructor or in reset()) by taking over the caller's existing ownership |
| // claim. The caller must own the object it gives to ScopedCFTypeRef<>, and |
| // relinquishes an ownership claim to that object. ScopedCFTypeRef<> does not |
| // call CFRetain(). This behavior is parameterized by the |OwnershipPolicy| |
| // enum. If the value |RETAIN| is passed (in the constructor or in reset()), |
| // then ScopedCFTypeRef<> will call CFRetain() on the object, and the initial |
| // ownership is not changed. |
| |
| namespace internal { |
| |
| struct ScopedCFTypeRefTraits { |
| static void Retain(CFTypeRef object) { |
| CFRetain(object); |
| } |
| static void Release(CFTypeRef object) { |
| CFRelease(object); |
| } |
| }; |
| |
| } // namespace internal |
| |
| template<typename CFT> |
| class ScopedCFTypeRef |
| : public ScopedTypeRef<CFT, internal::ScopedCFTypeRefTraits> { |
| public: |
| typedef CFT element_type; |
| |
| explicit ScopedCFTypeRef( |
| CFT object = NULL, |
| base::scoped_policy::OwnershipPolicy policy = base::scoped_policy::ASSUME) |
| : ScopedTypeRef<CFT, |
| internal::ScopedCFTypeRefTraits>(object, policy) {} |
| |
| ScopedCFTypeRef(const ScopedCFTypeRef<CFT>& that) |
| : ScopedTypeRef<CFT, internal::ScopedCFTypeRefTraits>(that) {} |
| }; |
| |
| } // namespace base |
| |
| #endif // BASE_MAC_SCOPED_CFTYPEREF_H_ |