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  *                  Hermes Belusca-Maito (hermes.belusca@sfr.fr)
   8  */
   9
  10 #ifndef _DOS_MEMORY_H_
  11 #define _DOS_MEMORY_H_
  12
  13 /* TYPEDEFS *******************************************************************/
  14
  15 #define SEGMENT_TO_MCB(seg) ((PDOS_MCB)SEG_OFF_TO_PTR((seg), 0))
  16
  17 #define DOS_ALLOC_HIGH      0x40
  18 #define DOS_ALLOC_HIGH_LOW  0x80
  19
  20 enum DOS_ALLOC_STRATEGY
  21 {
  22     DOS_ALLOC_FIRST_FIT,
  23     DOS_ALLOC_BEST_FIT,
  24     DOS_ALLOC_LAST_FIT
  25 };
  26
  27 #pragma pack(push, 1)
  28 typedef struct _DOS_MCB
  29 {
  30     CHAR BlockType;
  31     WORD OwnerPsp;
  32     WORD Size;
  33     BYTE Unused[3];
  34     CHAR Name[8];
  35 } DOS_MCB, *PDOS_MCB;
  36 C_ASSERT(sizeof(DOS_MCB) == 0x10);
  37 #pragma pack(pop)
  38
  39 /* VARIABLES ******************************************************************/
  40
  41 /* FUNCTIONS ******************************************************************/
  42
  43 WORD DosAllocateMemory(WORD Size, WORD *MaxAvailable);
  44 BOOLEAN DosResizeMemory(WORD BlockData, WORD NewSize, WORD *MaxAvailable);
  45 BOOLEAN DosFreeMemory(WORD BlockData);
  46 BOOLEAN DosLinkUmb(VOID);
  47 BOOLEAN DosUnlinkUmb(VOID);
  48 VOID DosChangeMemoryOwner(WORD Segment, WORD NewOwner);
  49
  50 VOID DosInitializeUmb(VOID);
  51 VOID DosInitializeMemory(VOID);
  52
  53 #endif // _DOS_MEMORY_H_
  54
  55 /* EOF */