IPMUnknown.h

//========================================================================================
// 
// $File$
// 
// Owner: Robin_Briggs
// 
// $Author$
// 
// $DateTime$
// 
// $Revision$
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// $Change$
// 
// Copyright 1997-2010 Adobe Systems Incorporated. All rights reserved.
// 
// NOTICE: Adobe permits you to use, modify, and distribute this file in accordance 
// with the terms of the Adobe license agreement accompanying it. If you have received
// this file from a source other than Adobe, then your use, modification, or 
// distribution of it requires the prior written permission of Adobe.
// 
// 
// Purpose:
// Base class for interfaces. Provides mechanism for querying interfaces, and for
// ref-counting objects.
// 
//========================================================================================

#ifndef __IPMUNKNOWN__
#define __IPMUNKNOWN__


// On Metrowerks on the Mac, in order to force COM compatible vtables we have to 
// inherit from SingleObject.
#if defined(MACINTOSH) && defined(__MWERKS__) && !defined(__MACH__)
#define :public SingleObject
#else
#define 
#endif

class IPMUnknown {
public: 
 virtual IPMUnknown *QueryInterface(PMIID interfaceID) const = 0;
 
 virtual void AddRef() const = 0;
 
 virtual void Release() const = 0;
};

#endif // __IPMUNKNOWN__