common/cfactory.hpp

// Copyright (c) 2010 The WebM project authors. All Rights Reserved.
//
// Use of this source code is governed by a BSD-style license
// that can be found in the LICENSE file in the root of the source
// tree. An additional intellectual property rights grant can be found
// in the file PATENTS.  All contributing project authors may
// be found in the AUTHORS file in the root of the source tree.

#pragma once
#include <objbase.h>

class CFactory : public IClassFactory
{
public:

    typedef HRESULT (*create_t)(IClassFactory*, IUnknown*, const IID&, void**);

    CFactory(ULONG*, create_t);
    virtual ~CFactory();

    HRESULT STDMETHODCALLTYPE QueryInterface(const IID&, void**);
    ULONG STDMETHODCALLTYPE AddRef();
    ULONG STDMETHODCALLTYPE Release();

    HRESULT STDMETHODCALLTYPE CreateInstance(IUnknown*, const IID&, void**);
    HRESULT STDMETHODCALLTYPE LockServer(BOOL);

private:

    const create_t m_create;

    ULONG* const m_pcLock;
    ULONG m_cRef;

    CFactory(const CFactory&);
    CFactory& operator=(const CFactory&);

};