reactos/subsystems/mvdm/ntvdm/dos/dos32krnl/memory.h

   1 /*
   2  * COPYRIGHT:       GPL - See COPYING in the top level directory
   3  * PROJECT:         ReactOS Virtual DOS Machine
   4  * FILE:            dos/dos32krnl/memory.h
   5  * PURPOSE:         DOS32 Memory Manager
   6  * PROGRAMMERS:     Aleksandar Andrejevic <theflash AT sdf DOT lonestar DOT org>
   7  */
   8
   9 #ifndef _DOS_MEMORY_H_
  10 #define _DOS_MEMORY_H_
  11
  12 /* TYPEDEFS *******************************************************************/
  13
  14 #define SEGMENT_TO_MCB(seg) ((PDOS_MCB)((ULONG_PTR)BaseAddress + TO_LINEAR((seg), 0)))
  15
  16 enum DOS_ALLOC_STRATEGY
  17 {
  18     DOS_ALLOC_FIRST_FIT,
  19     DOS_ALLOC_BEST_FIT,
  20     DOS_ALLOC_LAST_FIT
  21 };
  22
  23 #pragma pack(push, 1)
  24 typedef struct _DOS_MCB
  25 {
  26     CHAR BlockType;
  27     WORD OwnerPsp;
  28     WORD Size;
  29     BYTE Unused[3];
  30     CHAR Name[8];
  31 } DOS_MCB, *PDOS_MCB;
  32 #pragma pack(pop)
  33
  34 /* VARIABLES ******************************************************************/
  35
  36 extern BYTE DosAllocStrategy;
  37 extern BOOLEAN DosUmbLinked;
  38
  39 /* FUNCTIONS ******************************************************************/
  40
  41 WORD DosAllocateMemory(WORD Size, WORD *MaxAvailable);
  42 BOOLEAN DosResizeMemory(WORD BlockData, WORD NewSize, WORD *MaxAvailable);
  43 BOOLEAN DosFreeMemory(WORD BlockData);
  44 BOOLEAN DosLinkUmb(VOID);
  45 BOOLEAN DosUnlinkUmb(VOID);
  46 VOID DosChangeMemoryOwner(WORD Segment, WORD NewOwner);
  47
  48 #endif // _DOS_MEMORY_H_
  49
  50 /* EOF */