79 lines
1.8 KiB
C
79 lines
1.8 KiB
C
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#include "shellprv.h"
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#pragma hdrstop
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#define EXPIRATION_NEVER 0xFFFFFFFF
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class CSubDataProvider;
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typedef BOOL (CSubDataProvider::*SUBDATACB)(PVOID pvData);
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typedef BOOL (*STATICSUBDATACB)(PVOID pvData);
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class CSubData
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{
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///////////////////////////////////////////////////////////////////////////////
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// Public methods
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///////////////////////////////////////////////////////////////////////////////
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public:
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// Only one of the following two fcts should be called
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BOOL Init(CSubDataProvider* pSDProv, SUBDATACB fctCB, PVOID pvData);
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BOOL InitStatic(STATICSUBDATACB fctStaticCB, PVOID pvData);
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BOOL InitExpiration(DWORD cTick);
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virtual BOOL Update();
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virtual void Invalidate();
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void HoldUpdates();
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void ResumeUpdates();
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CSubData();
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///////////////////////////////////////////////////////////////////////////////
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// Miscellaneous helpers
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///////////////////////////////////////////////////////////////////////////////
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private:
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BOOL _Call();
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protected:
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void _SetTickLastUpdate(DWORD dwTick);
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DWORD _GetTickLastUpdate();
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DWORD* _GetTickLastUpdatePtr();
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PVOID _GetDataPtr();
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void _SetDataPtr(PVOID pvData);
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BOOL _IsExpired();
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BOOL _IsValid();
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///////////////////////////////////////////////////////////////////////////////
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// Data
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///////////////////////////////////////////////////////////////////////////////
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protected:
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CSubDataProvider* _pSDProv;
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union
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{
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SUBDATACB _fctCB;
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STATICSUBDATACB _fctStaticCB;
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};
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DWORD _dwTickLast;
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PVOID _pvData;
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DWORD _cTickExpiration;
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BOOL _fHoldUpdate;
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BOOL _fStatic;
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BOOL _fInvalid;
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private:
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#ifdef DEBUG
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BOOL _fInited;
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#endif
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};
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class CSubDataProvider
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{
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};
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