89 lines
2.3 KiB
C++
89 lines
2.3 KiB
C++
//+---------------------------------------------------------------------------
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//
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// Microsoft Windows
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// Copyright (C) Microsoft Corporation, 1992 - 1994.
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//
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// File: mmodel.hxx
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//
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// Contents: CMemoryModel
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//
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// History: 29-Sep-94 DrewB Created
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//
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//----------------------------------------------------------------------------
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#ifndef __MMODEL_HXX__
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#define __MMODEL_HXX__
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//+---------------------------------------------------------------------------
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//
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// Class: CMemoryModel (mm)
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//
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// Purpose: Defines an abstract interface to memory allocation
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// so that code can be written which uses both 16 and
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// 32-bit memory
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//
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// History: 29-Sep-94 DrewB Created
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//
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//----------------------------------------------------------------------------
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class CMemoryModel
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{
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public:
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virtual DWORD AllocMemory(DWORD cb) = 0;
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virtual void FreeMemory(DWORD dwMem) = 0;
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virtual LPVOID ResolvePtr(DWORD dwMem, DWORD cb) = 0;
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virtual void ReleasePtr(DWORD dwMem) = 0;
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};
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//+---------------------------------------------------------------------------
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//
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// Class: CMemoryModel16 (mm16)
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//
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// Purpose: 16-bit memory model
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//
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// History: 29-Sep-94 DrewB Created
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//
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//----------------------------------------------------------------------------
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class CMemoryModel16 : public CMemoryModel
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{
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public:
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CMemoryModel16(BOOL fPublic)
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{
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_fPublic = fPublic;
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}
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virtual DWORD AllocMemory(DWORD cb);
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virtual void FreeMemory(DWORD dwMem);
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virtual LPVOID ResolvePtr(DWORD dwMem, DWORD cb);
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virtual void ReleasePtr(DWORD dwMem);
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private:
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BOOL _fPublic;
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};
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//+---------------------------------------------------------------------------
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//
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// Class: CMemoryModel32 (mm32)
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//
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// Purpose: 16-bit memory model
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//
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// History: 29-Sep-94 DrewB Created
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//
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//----------------------------------------------------------------------------
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class CMemoryModel32 : public CMemoryModel
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{
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public:
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virtual DWORD AllocMemory(DWORD cb);
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virtual void FreeMemory(DWORD dwMem);
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virtual LPVOID ResolvePtr(DWORD dwMem, DWORD cb);
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virtual void ReleasePtr(DWORD dwMem);
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};
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extern CMemoryModel16 mmodel16Public;
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extern CMemoryModel16 mmodel16Owned;
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extern CMemoryModel32 mmodel32;
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#endif // #ifndef __MMODEL_HXX__
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