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