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354 lines
9.5 KiB
354 lines
9.5 KiB
/*
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* regitem.h
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*
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* Copyright (c) 1995 by DataBeam Corporation, Lexington, KY
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*
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* Abstract:
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* This is the interface file for the class CRegItem. This class
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* manages the data associated with a Registry Item. Registry Item’s are
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* used to identify a particular entry in the application registry and
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* may exist in the form of a Channel ID, a Token ID, or an octet string
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* parameter. A CRegItem object holds the data for the first two
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* forms in a ChannelID and a TokeID, respectively. When the registry item
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* assumes the octet string parameter form, the data is held internally in
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* a Rogue Wave string object.
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*
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* Caveats:
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* None.
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*
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* Author:
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* blp/jbo
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*/
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#ifndef _REGISTRY_ITEM_
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#define _REGISTRY_ITEM_
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/*
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* Class definition:
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*/
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class CRegItem : public CRefCount
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{
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public:
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CRegItem(PGCCRegistryItem, PGCCError);
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CRegItem(PRegistryItem, PGCCError);
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CRegItem(CRegItem *, PGCCError);
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~CRegItem(void);
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UINT GetGCCRegistryItemData(PGCCRegistryItem, LPBYTE memory);
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UINT LockRegistryItemData(void);
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void UnLockRegistryItemData(void);
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void GetRegistryItemDataPDU(PRegistryItem);
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void FreeRegistryItemDataPDU(void);
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GCCError CreateRegistryItemData(PGCCRegistryItem *);
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BOOL IsThisYourTokenID(TokenID nTokenID)
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{
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return ((m_eItemType == GCC_REGISTRY_TOKEN_ID) && (nTokenID == m_nTokenID));
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}
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void operator= (const CRegItem&);
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protected:
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GCCRegistryItemType m_eItemType;
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ChannelID m_nChannelID;
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TokenID m_nTokenID;
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LPOSTR m_poszParameter;
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UINT m_cbDataSize;
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RegistryItem m_RegItemPDU;
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BOOL m_fValidRegItemPDU;
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};
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/*
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* Comments explaining the public and protected class member functions
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*/
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/*
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* CRegItem ( PGCCRegistryItem registry_item,
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* PGCCError return_value);
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*
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* Public member function of CRegItem.
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*
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* Function Description:
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* This is the constructor for the CRegItem class which takes as
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* input the "API" version of registry item data, GCCRegistryItem.
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*
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* Formal Parameters:
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* registry_item (i) The registry item data to store.
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* return_value (o) The output parameter used to indicate errors.
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*
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* Return Value:
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* GCC_NO_ERROR - No error.
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*
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* Side Effects:
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* None.
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*
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* Caveats:
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* None.
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*/
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/*
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* CRegItem ( PRegistryItem registry_item,
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* PGCCError return_value);
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*
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* Public member function of CRegItem.
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*
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* Function Description:
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* This is the constructor for the CRegItem class which takes as
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* input the "PDU" version of registry item data, RegistryItem.
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*
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* Formal Parameters:
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* registry_item (i) The registry item data to store.
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* return_value (o) The output parameter used to indicate errors.
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*
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* Return Value:
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* GCC_NO_ERROR - No error.
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*
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* Side Effects:
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* None.
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*
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* Caveats:
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* None.
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*/
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/*
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* CRegItem(CRegItem *registry_item,
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* PGCCError return_value);
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*
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* Public member function of CRegItem.
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*
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* Function Description:
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* This is the copy constructor for the CRegItem class which takes
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* as input another CRegItem object.
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*
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* Formal Parameters:
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* registry_item (i) The CRegItem object to copy.
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* return_value (o) The output parameter used to indicate errors.
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*
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* Return Value:
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* GCC_NO_ERROR - No error.
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*
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* Side Effects:
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* None.
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*
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* Caveats:
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* None.
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*/
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/*
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* ~CRegItem();
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*
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* Public member function of CRegItem.
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*
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* Function Description:
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* This is the destructor for the CRegItem class. Since all data
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* maintained by this class is held in automatic private instance
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* variables, there is no cleanup needed in this destructor.
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*
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* Formal Parameters:
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* None.
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*
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* Return Value:
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* None.
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*
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* Side Effects:
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* None.
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*
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* Caveats:
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* None.
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*/
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/*
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* UINT GetGCCRegistryItemData (
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* PGCCRegistryItem registry_item,
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* LPSTR memory);
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*
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* Public member function of CRegItem.
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*
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* Function Description:
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* This routine is used to retrieve the registry item data from the
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* CRegItem object in the "API" form of a GCCRegistryItem.
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*
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* Formal Parameters:
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* registry_item (o) The GCCRegistryItem structure to fill in.
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* memory (o) The memory used to hold any data referenced by,
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* but not held in, the output structure.
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*
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* Return Value:
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* The amount of data, if any, written into the bulk memory block provided.
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*
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* Side Effects:
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* None.
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*
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* Caveats:
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* None.
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*/
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/*
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* UINT LockRegistryItemData ();
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*
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* Public member function of CRegItem.
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*
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* Function Description:
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* This routine is used to "lock" the "API" data for this object. This
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* results in the lock count for this object being incremented. When the
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* lock count transitions from 0 to 1, a calculation is made to determine
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* how much memory, if any, will be needed to hold any "API" data which
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* will be referenced by, but not held in, the GCCRegistryItem structure
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* which is filled in on a call to GetGCCRegistryItemData. This is the
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* value returned by this routine in order to allow the calling object to
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* allocate that amount of memory in preparation for the call to
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* GetGCCRegistryItemData.
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*
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* Formal Parameters:
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* None.
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*
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* Return Value:
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* The amount of memory, if any, which will be needed to hold "API" data
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* which is referenced by, but not held in, the GCCRegistryItem structure
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* provided as an output parameter to the GetGCCRegistryItemData call.
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*
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* Side Effects:
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* The internal lock count is incremented.
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*
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* Caveats:
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* The internal lock count is used in conjuction with an internal "free"
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* flag as a mechanism for ensuring that this object remains in existance
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* until all interested parties are through with it. The object remains
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* valid (unless explicity deleted) until the lock count is zero and the
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* "free" flag is set through a call to FreeRegistryItemData. This allows
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* other objects to lock this object and be sure that it remains valid
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* until they call UnLock which will decrement the internal lock count. A
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* typical usage scenerio for this object would be: A CRegItem
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* object is constructed and then passed off to any interested parties
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* through a function call. On return from the function call, the
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* FreeRegistryItemData call is made which will set the internal "free"
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* flag. If no other parties have locked the object with a Lock call,
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* then the CRegItem object will automatically delete itself when
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* the FreeRegistryItemData call is made. If, however, any number of
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* other parties has locked the object, it will remain in existence until
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* each of them has unlocked the object through a call to UnLock.
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*/
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/*
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* void UnLockRegistryItemData ();
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*
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* Public member function of CRegItem.
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*
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* Function Description:
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* This routine is used to "unlock" the "API" data for this object. This
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* results in the lock count for this object being decremented. When the
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* lock count transitions from 1 to 0, a check is made to determine
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* whether the object has been freed through a call to
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* FreeRegistryItemData. If so, the object will automatically delete
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* itself.
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*
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* Formal Parameters:
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* None.
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*
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* Return Value:
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* None.
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*
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* Side Effects:
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* The internal lock count is decremented.
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*
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* Caveats:
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* It is the responsibility of any party which locks a CRegItem
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* object by calling Lock to also unlock the object with a call to UnLock.
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* If the party calling UnLock did not construct the CRegItem
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* object, it should assume the object to be invalid thereafter.
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*/
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/*
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* void GetRegistryItemDataPDU (
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* PRegistryItem registry_item);
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*
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* Public member function of CRegItem.
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*
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* Function Description:
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* This routine is used to retrieve the registry item data from the
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* CRegItem object in the "PDU" form of a RegistryItem.
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*
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* Formal Parameters:
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* registry_item (o) The RegistryItem structure to fill in.
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*
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* Return Value:
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* GCC_NO_ERROR - No error.
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*
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* Side Effects:
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* None.
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*
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* Caveats:
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* None.
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*/
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/*
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* void FreeRegistryItemDataPDU ();
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*
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* Public member function of CRegItem.
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*
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* Function Description:
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* This routine is used to "free" the "PDU" data for this object. For
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* this object, this means setting a flag to indicate that the "PDU" data
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* for this object is no longer valid.
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*
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* Formal Parameters:
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* None.
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*
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* Return Value:
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* None.
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*
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* Side Effects:
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* The internal "free" flag is set.
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*
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* Caveats:
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* This object should be assumed invalid after a call to
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* FreeRegistryItemData has been made.
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*/
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/*
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* BOOL IsThisYourTokenID (
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* TokenID token_id);
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*
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* Public member function of CRegItem.
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*
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* Function Description:
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* This routine is used to determine whether the specified token ID is
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* held within this registry item object.
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*
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* Formal Parameters:
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* token_id (i) The token ID to use for comparison.
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*
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* Return Value:
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* TRUE - The specified token ID is contained within this
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* registry item object.
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* FALSE - The specified token ID is not contained within
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* this registry item object.
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*
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* Side Effects:
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* None.
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*
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* Caveats:
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* None.
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*/
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/*
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* void operator= (
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* const CRegItem& registry_item_data);
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*
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* Public member function of CRegItem.
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*
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* Function Description:
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* This routine is used to set this CRegItem object to be equal
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* in value to the specified CRegItem object.
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*
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* Formal Parameters:
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* registry_item_data (i) The CRegItem object to copy.
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*
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* Return Value:
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* None.
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*
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* Side Effects:
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* The registry item data values for this object are modified by this call.
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*
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* Caveats:
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* The "lock" and "free" states for this object are not affected by
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* this call.
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*/
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#endif
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