Leaked source code of windows server 2003
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/******************************Module*Header*******************************\
** !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!* !! !!* !! WARNING: NOT DDK SAMPLE CODE !!* !! !!* !! This source code is provided for completeness only and should not be !!* !! used as sample code for display driver development. Only those sources !!* !! marked as sample code for a given driver component should be used for !!* !! development purposes. !!* !! !!* !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!** Module Name: linalloc.h** Content: ** Copyright (c) 1994-1999 3Dlabs Inc. Ltd. All rights reserved.* Copyright (c) 1995-2003 Microsoft Corporation. All rights reserved.\*****************************************************************************/#ifndef __LINALLOC_H_
#define __LINALLOC_H_
// Result values from calls to videomem allocator functions
#define GLDD_FAILED ((DWORD)(-1))
#define GLDD_SUCCESS 0
#define GLDD_NOMEM 1
#define GLDD_INVALIDARGS 2
#define GLDD_FREE_REFERENCE 3
typedef struct tagMEMREQUEST{ DWORD dwSize; // Size of this structure
DWORD dwFlags; // Flags for this allocation
DWORD dwAlign; // Alignment (minimum 4 Bytes)
DWORD dwBytes; // Bytes to allocated (aligned up to DWORD multiples)
DWORD pMem; // Pointer to the start of the memory returned
} P3_MEMREQUEST, *LPMEMREQUEST;
// P3_MEMREQUEST.dwFlags values for memory allocation
// Favour which end of memory?
#define MEM3DL_FRONT 1
#define MEM3DL_BACK 2
// Allocation strategy
#define MEM3DL_FIRST_FIT 8
typedef struct LinearAllocatorInfo;typedef void (*LinearAllocatorCallbackFn)( DWORD, DWORD );
// Video local memory allocation functions
BOOL _DX_LIN_InitialiseHeapManager(LinearAllocatorInfo* pAlloc, DWORD dwMemStar, DWORD dwMemEnd);void _DX_LIN_UnInitialiseHeapManager(LinearAllocatorInfo* pAlloc);DWORD _DX_LIN_GetFreeMemInHeap(LinearAllocatorInfo* pAlloc);DWORD _DX_LIN_AllocateLinearMemory(LinearAllocatorInfo* pAlloc, LPMEMREQUEST lpmmrq);DWORD _DX_LIN_FreeLinearMemory(LinearAllocatorInfo* pAlloc, DWORD dwPointer);
// We will use a bitwise memory map to keep track of used & free memory
// (The size of this structure will be for now 32K , which will give us
// a total of 256K chunks, which for a 32MB heap means each chunk
// controls 128 bytes)
#define MEMORY_MAP_SIZE (32*1024)/sizeof(DWORD)
typedef DWORD MemoryMap[MEMORY_MAP_SIZE]; // Chunks memory map
typedef struct tagHashTable HashTable; // Forward decl when referenced from GDI
typedef struct tagLinearAllocatorInfo{ BOOL bResetLinAllocator; // Bool to signal us the allocators
// have been reset from the 16 bit side
DWORD dwMemStart; // Start of the managed memory
DWORD dwMemEnd; // End of the managed memory
DWORD dwMaxChunks; // Max # of chunks (can't exceed
// MEMORY_MAP_SIZE*CHUNKS_PER_ELEM)
DWORD dwMemPerChunk; // How much heap memory each chunk
// controls
MemoryMap *pMMap; // Ptr to allocations memory map
MemoryMap *pLenMap; // Ptr to lenghts memory map so we don't
// have to keep the sizes allocated to
// each request
} LinearAllocatorInfo;
#endif // __LINALLOC_H_
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