APPMEMI.H

/*++ BUILD Version: 0001    // Increment this if a change has global effects 
 
Copyright 1995 - 1998 Microsoft Corporation 
 
Header Name: 
 
    appmem.h 
 
Abstract: 
 
    Contains the global definitions for use by the performance DLL and 
    the DLL used by the application to allocate and track memory. The 
    definitions in this file ARE NOT used by the application programmer 
 
Created:     
 
    Bob Watson 24 august 1995 
 
Revision History 
 
    None 
 
--*/ 
#ifndef _APPMEM_H_ 
#define _APPMEM_H_ 
 
#define MAX_SIZEOF_INSTANCE_NAME    32 
 
typedef struct _APPMEM_INSTANCE { 
    DWORD   dwOffsetOfNext;     // offset from mem base to next item in list 
    DWORD   dwProcessId;        // id of process using this instance 
    HANDLE  hProcessHeap;       // handle of process's default heap 
    DWORD   dwApplicationBytes; // current count of heap bytes allocated 
                                //  by the app mem allocation DLL functions 
    DWORD   dwAllocCalls;       // number of memory allocation calls 
    DWORD   dwReAllocCalls;     // number of Re-Allocation calls 
    DWORD   dwFreeCalls;        // number of memory free calls 
    WCHAR   wcszInstanceName[MAX_SIZEOF_INSTANCE_NAME]; // SZ instance name 
    DWORD   dwReserved1;        // unused 
    DWORD   dwReserved2;        // unused 
} APPMEM_INSTANCE, *PAPPMEM_INSTANCE; 
 
#define SHARED_MEMORY_ITEM_COUNT    100 
#define SHARED_MEMORY_OBJECT_SIZE   (sizeof(PDWORD) + (sizeof(PAPPMEM_INSTANCE) * 2) + (SHARED_MEMORY_ITEM_COUNT * sizeof(APPMEM_INSTANCE))) 
#define SHARED_MEMORY_OBJECT_NAME   (TEXT("APPMEM_PERF_DATA")) 
 
#define SHARED_MEMORY_MUTEX_NAME    (TEXT("APPMEM_PERF_DATA_MUTEX")) 
#define SHARED_MEMORY_MUTEX_TIMEOUT ((DWORD)1000L) 
 
typedef struct _APPMEM_DATA_HEADER { 
    DWORD               dwInstanceCount;        // number of entries In Use 
    DWORD               dwFirstInUseOffset;     // offset from mem base 
    DWORD               dwFirstFreeOffset;      // offset from mem base 
} APPMEM_DATA_HEADER, *PAPPMEM_DATA_HEADER; 
 
#define     FIRST_FREE(base)    ((PAPPMEM_INSTANCE)((LPBYTE)(base) + ((PAPPMEM_DATA_HEADER)(base))->dwFirstFreeOffset)) 
#define     FIRST_INUSE(base)   ((PAPPMEM_INSTANCE)((LPBYTE)(base) + ((PAPPMEM_DATA_HEADER)(base))->dwFirstInUseOffset)) 
#define     APPMEM_INST(base, offset)   ((PAPPMEM_INSTANCE)((LPBYTE)(base) + (DWORD)(offset))) 
 
LONG 
_stdcall 
GetSharedMemoryDataHeader ( 
    IN  HANDLE              *phAppMemSharedMemory, 
    IN  HANDLE              *phAppMemMutex, 
    IN  PAPPMEM_DATA_HEADER *pHeader, 
    IN  BOOL                bReadOnlyAccess 
); 
 
 
#endif //_APPMEM_H_