| // Copyright 2012 The Chromium Authors |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef BASE_ALLOCATOR_PARTITION_ALLOCATOR_SRC_PARTITION_ALLOC_PARTITION_ALLOC_BASE_APPLE_SCOPED_CFTYPEREF_H_ |
| #define BASE_ALLOCATOR_PARTITION_ALLOCATOR_SRC_PARTITION_ALLOC_PARTITION_ALLOC_BASE_APPLE_SCOPED_CFTYPEREF_H_ |
| |
| #include <CoreFoundation/CoreFoundation.h> |
| |
| #include "partition_alloc/partition_alloc_base/apple/scoped_typeref.h" |
| |
| namespace partition_alloc::internal::base::apple { |
| |
| // 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 partition_alloc::internal::base::apple |
| |
| #endif // BASE_ALLOCATOR_PARTITION_ALLOCATOR_SRC_PARTITION_ALLOC_PARTITION_ALLOC_BASE_APPLE_SCOPED_CFTYPEREF_H_ |