| // Copyright (c) 2013 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_BLOCK_H_ |
| #define BASE_MAC_SCOPED_BLOCK_H_ |
| |
| #include <Block.h> |
| |
| #include "base/mac/scoped_typeref.h" |
| |
| #if defined(__has_feature) && __has_feature(objc_arc) |
| #define BASE_MAC_BRIDGE_CAST(TYPE, VALUE) (__bridge TYPE)(VALUE) |
| #else |
| #define BASE_MAC_BRIDGE_CAST(TYPE, VALUE) VALUE |
| #endif |
| |
| namespace base { |
| namespace mac { |
| |
| namespace internal { |
| |
| template <typename B> |
| struct ScopedBlockTraits { |
| static B InvalidValue() { return nullptr; } |
| static B Retain(B block) { |
| return BASE_MAC_BRIDGE_CAST( |
| B, Block_copy(BASE_MAC_BRIDGE_CAST(const void*, block))); |
| } |
| static void Release(B block) { |
| Block_release(BASE_MAC_BRIDGE_CAST(const void*, block)); |
| } |
| }; |
| |
| } // namespace internal |
| |
| // ScopedBlock<> is patterned after ScopedCFTypeRef<>, but uses Block_copy() and |
| // Block_release() instead of CFRetain() and CFRelease(). |
| |
| template <typename B> |
| using ScopedBlock = ScopedTypeRef<B, internal::ScopedBlockTraits<B>>; |
| |
| } // namespace mac |
| } // namespace base |
| |
| #undef BASE_MAC_BRIDGE_CAST |
| |
| #endif // BASE_MAC_SCOPED_BLOCK_H_ |