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- // 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 std::unique_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
- // std::unique_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 {
- template<typename CFT>
- struct ScopedCFTypeRefTraits {
- static CFT InvalidValue() { return nullptr; }
- static CFT Retain(CFT object) {
- CFRetain(object);
- return object;
- }
- static void Release(CFT object) {
- CFRelease(object);
- }
- };
- } // namespace internal
- template<typename CFT>
- using ScopedCFTypeRef =
- ScopedTypeRef<CFT, internal::ScopedCFTypeRefTraits<CFT>>;
- } // namespace base
- #endif // BASE_MAC_SCOPED_CFTYPEREF_H_
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