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// 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)
#error "Cannot include base/mac/scoped_block.h in file built with ARC."
#endif
namespace base {
namespace mac {
namespace internal {
template <typename B>
struct ScopedBlockTraits {
static B InvalidValue() { return nullptr; }
static B Retain(B block) { return Block_copy(block); }
static void Release(B block) { Block_release(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
#endif // BASE_MAC_SCOPED_BLOCK_H_
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