blob: ff7e87039b0887312fef48874287abf0933b7656 [file] [log] [blame]
// 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();
virtual ULONG STDMETHODCALLTYPE AddRef() OVERRIDE;
virtual ULONG STDMETHODCALLTYPE Release() OVERRIDE;
// Subclasses should extend this to return any interfaces they provide.
virtual STDMETHODIMP QueryInterface(REFIID riid, void** ppv) OVERRIDE;
protected:
virtual ~IUnknownImpl();
private:
AtomicRefCount ref_count_;
};
} // namespace win
} // namespace base
#endif // BASE_WIN_IUNKNOWN_IMPL_H_