100 lines
2.4 KiB
C
100 lines
2.4 KiB
C
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//////////////////////////////////////////////////////
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//
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// HeapDet.h - Copyright 1995, Don Box
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//
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// Simple IMallocSpy to track allocation byte count
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//
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#ifndef _HEAPDET_H
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#define _HEAPDET_H
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class CoHeapDetective : public IMallocSpy
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{
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public:
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CoHeapDetective();
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virtual ~CoHeapDetective();
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SIZE_T GetBytesAlloced() const;
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#ifdef _HEAPDET_INTERNAL_
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__declspec( dllexport )
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#else
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__declspec( dllimport )
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#endif
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static class CoHeapDetective*
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GetDetective() ;
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private:
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// paramters to cache between pre/post phases
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static HMODULE g_HeapdetLib ;
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static long g_cLibRefs ;
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//
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// Number of References on this instance
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//
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long m_cRefs ;
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SIZE_T m_cbLastAlloc;
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void *m_pvLastRealloc;
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// total heap usage
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SIZE_T m_dwBytesAlloced;
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// output device for tracing
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HANDLE m_hTraceOutput;
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// helper function to send simple trace message to debug window
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void Trace(SIZE_T cb, PVOID pv, LPCTSTR szAction, BOOL bSuccess);
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// simple alloc header to track allocation size
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struct ArenaHeader
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{
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enum { SIGNATURE = 0x1BADABBAL };
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struct ArenaHeader* m_pNext ;
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struct ArenaHeader* m_pPrev ;
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SIZE_T m_dwAllocSize; // the user's idea of size
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DWORD m_dwSignature; // always 0x1BADABBA when good
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};
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ArenaHeader m_list ;
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// helper function to write a valid arena header at ptr
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void SetArenaHeader(void *ptr, SIZE_T dwAllocSize);
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// helper function to verify and return the prepended
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// header (or null if failure)
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ArenaHeader *GetHeader(void *ptr);
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public:
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// IUnknown methods
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STDMETHODIMP QueryInterface(REFIID riid, void**ppv);
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STDMETHODIMP_(ULONG) AddRef();
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STDMETHODIMP_(ULONG) Release();
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// IMallocSpy methods
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STDMETHODIMP_(SIZE_T) PreAlloc(SIZE_T cbRequest);
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STDMETHODIMP_(void*) PostAlloc(void *pActual);
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STDMETHODIMP_(void*) PreFree(void *pRequest, BOOL fSpyed);
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STDMETHODIMP_(void) PostFree(BOOL fSpyed);
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STDMETHODIMP_(SIZE_T) PreRealloc(void *pRequest, SIZE_T cbRequest,
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void **ppNewRequest, BOOL fSpyed);
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STDMETHODIMP_(void*) PostRealloc(void *pActual, BOOL fSpyed);
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STDMETHODIMP_(void*) PreGetSize(void *pRequest, BOOL fSpyed);
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STDMETHODIMP_(SIZE_T) PostGetSize(SIZE_T cbActual, BOOL fSpyed);
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STDMETHODIMP_(void*) PreDidAlloc(void *pRequest, BOOL fSpyed);
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STDMETHODIMP_(int) PostDidAlloc(void *pRequest, BOOL fSpyed, int fActual);
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STDMETHODIMP_(void) PreHeapMinimize(void);
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STDMETHODIMP_(void) PostHeapMinimize(void);
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};
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#endif
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