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181 lines
5.1 KiB
181 lines
5.1 KiB
/*++
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Copyright (c) 1990 Microsoft Corporation
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Module Name:
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clasdesc.hxx
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Abstract:
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This module contains the declaration for the CLASS_DESCRIPTOR class.
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A CLASS_DESCRIPTOR contains informatiom to help identify an object's
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type at run-time. It is a concrete class which is associated with all
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other concrete classes (i.e. there is one instance of a CLASS_DESCRIPTOR
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for every concrete class in Ulib). The most important aspect of a
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CLASS_DESCRIPTOR is that it supplies a guaranteed unique id for the class
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that it decsribes.
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Environment:
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ULIB, User Mode
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Notes:
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--*/
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#if ! defined( _CLASS_DESCRIPTOR_ )
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#define _CLASS_DESCRIPTOR_
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//
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// Forward references
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//
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DECLARE_CLASS( CLASS_DESCRIPTOR );
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#define UNDEFINE_CLASS_DESCRIPTOR( c ) delete (PCLASS_DESCRIPTOR) c##_cd, c##_cd = 0
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#if DBG==1
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//
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// Define a CLASS_DESCRIPTOR in the file ulib.cxx. The name will be
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// the same as the type name for the associated class.
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//
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#define DEFINE_CLASS_DESCRIPTOR( c ) \
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((( c##_cd = NEW CLASS_DESCRIPTOR ) != NULL ) && \
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((( PCLASS_DESCRIPTOR ) c##_cd )->Initialize(( PCCLASS_NAME ) #c )))
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#define CLASS_DESCRIPTOR_INITIALIZE \
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NONVIRTUAL \
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ULIB_EXPORT \
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BOOLEAN \
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Initialize ( \
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IN PCCLASS_NAME ClassName \
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)
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//
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// For debugging purposes, CLASS_DESCRIPTOR stores the name of the class
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// that it describes.
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//
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// NOTE - DebugGetClassName is declared for both CLASS_DESCRIPTOR and
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// OBJECT. See the note at the end of this module.
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//
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//
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// Maximum length for the name of a class
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//
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CONST _MaxClassNameLength = 20;
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#define DECLARE_CD_DBG_DATA \
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CLASS_NAME _ClassName[ _MaxClassNameLength ]
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#define DECLARE_CD_DBG_FUNCTIONS \
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NONVIRTUAL \
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PCCLASS_NAME \
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DebugGetClassName ( \
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) CONST
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#define DEFINE_CD_INLINE_DBG_FUNCTIONS \
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\
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inline \
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PCCLASS_NAME \
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CLASS_DESCRIPTOR::DebugGetClassName ( \
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) CONST \
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{ \
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return(( PCCLASS_NAME ) _ClassName );\
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}
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#define DbgGetClassName( pobj ) \
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( pobj )->DebugGetClassName( )
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#else // DBG == 0
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#define DEFINE_CLASS_DESCRIPTOR( c ) \
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((( c##_cd = NEW CLASS_DESCRIPTOR ) != NULL ) && \
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((( PCLASS_DESCRIPTOR ) c##_cd )->Initialize( )))
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#define CLASS_DESCRIPTOR_INITIALIZE \
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NONVIRTUAL \
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ULIB_EXPORT \
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BOOLEAN \
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Initialize ( \
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)
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#define DECLARE_CD_DBG_DATA \
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static char d
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#define DECLARE_CD_DBG_FUNCTIONS \
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void f(void){}
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#define DEFINE_CD_INLINE_DBG_FUNCTIONS \
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inline void f(void){}
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#define DbgGetClassName( pobj )
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#endif // DBG
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class CLASS_DESCRIPTOR {
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friend
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BOOLEAN
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InitializeUlib(
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IN HANDLE DllHandle,
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IN ULONG Reason,
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IN PVOID Reserved
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);
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public:
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ULIB_EXPORT
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CLASS_DESCRIPTOR(
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);
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CLASS_DESCRIPTOR_INITIALIZE;
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NONVIRTUAL
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CLASS_ID
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QueryClassId (
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) CONST;
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DECLARE_CD_DBG_FUNCTIONS;
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private:
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DECLARE_CD_DBG_DATA;
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CLASS_ID _ClassID;
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};
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INLINE
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CLASS_ID
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CLASS_DESCRIPTOR::QueryClassId (
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) CONST
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/*++
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Routine Description:
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Return the CLASSID for the object described by this CLASS_DESCRIPTOR.
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Arguments:
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None.
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Return Value:
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CLASSID - The CLASSID as maintained by this CLASS_DESCRIPTOR.
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--*/
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{
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return( _ClassID );
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}
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DEFINE_CD_INLINE_DBG_FUNCTIONS;
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#endif // CLASS_DESCRIPTOR
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