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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_WIN_IUNKNOWN_IMPL_H_
#define BASE_WIN_IUNKNOWN_IMPL_H_
#include <unknwn.h>
#include "base/atomic_ref_count.h"
#include "base/base_export.h"
#include "base/compiler_specific.h"
namespace base {
namespace win {
// IUnknown implementation for other classes to derive from.
class BASE_EXPORT IUnknownImpl : public IUnknown {
public:
IUnknownImpl();
ULONG STDMETHODCALLTYPE AddRef() override;
ULONG STDMETHODCALLTYPE Release() override;
// Subclasses should extend this to return any interfaces they provide.
STDMETHODIMP QueryInterface(REFIID riid, void** ppv) override;
protected:
virtual ~IUnknownImpl();
private:
AtomicRefCount ref_count_;
};
} // namespace win
} // namespace base
#endif // BASE_WIN_IUNKNOWN_IMPL_H_
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