reactos/subsys/win32k/include/object.h

   1 #ifndef __WIN32K_OBJECT_H
   2 #define __WIN32K_OBJECT_H
   3
   4 #include <windows.h>
   5
   6 typedef enum {
   7   otUnknown = 0,
   8   otClass,
   9   otWindow
  10 } USER_OBJECT_TYPE;
  11
  12 typedef struct _USER_OBJECT_HEADER
  13 /*
  14  * Header for user object
  15  */
  16 {
  17   USER_OBJECT_TYPE Type;
  18   LONG HandleCount;
  19   LONG RefCount;
  20   CSHORT Size;
  21 } USER_OBJECT_HEADER, *PUSER_OBJECT_HEADER;
  22
  23
  24 typedef struct _USER_HANDLE
  25 {
  26   PVOID ObjectBody;
  27 } USER_HANDLE, *PUSER_HANDLE;
  28
  29 #define HANDLE_BLOCK_ENTRIES ((PAGESIZE-sizeof(LIST_ENTRY))/sizeof(USER_HANDLE))
  30
  31 typedef struct _USER_HANDLE_BLOCK
  32 {
  33   LIST_ENTRY ListEntry;
  34   USER_HANDLE Handles[HANDLE_BLOCK_ENTRIES];
  35 } USER_HANDLE_BLOCK, *PUSER_HANDLE_BLOCK;
  36
  37 typedef struct _USER_HANDLE_TABLE
  38 {
  39    LIST_ENTRY ListHead;
  40    PFAST_MUTEX ListLock;
  41 } USER_HANDLE_TABLE, *PUSER_HANDLE_TABLE;
  42
  43
  44 ULONG
  45 ObmGetReferenceCount(
  46   PVOID ObjectBody);
  47
  48 ULONG
  49 ObmGetHandleCount(
  50   PVOID ObjectBody);
  51
  52 VOID
  53 ObmReferenceObject(
  54   PVOID ObjectBody);
  55
  56 VOID
  57 ObmDereferenceObject(
  58   PVOID ObjectBody);
  59
  60 NTSTATUS
  61 ObmReferenceObjectByPointer(
  62   PVOID ObjectBody,
  63   USER_OBJECT_TYPE ObjectType);
  64
  65 PVOID
  66 ObmCreateObject(
  67   PUSER_HANDLE_TABLE HandleTable,
  68   PHANDLE Handle,
  69         USER_OBJECT_TYPE ObjectType,
  70   ULONG ObjectSize);
  71
  72 NTSTATUS
  73 ObmCreateHandle(
  74   PUSER_HANDLE_TABLE HandleTable,
  75   PVOID ObjectBody,
  76         PHANDLE HandleReturn);
  77
  78 NTSTATUS
  79 ObmReferenceObjectByHandle(
  80   PUSER_HANDLE_TABLE HandleTable,
  81   HANDLE Handle,
  82         USER_OBJECT_TYPE ObjectType,
  83         PVOID* Object);
  84
  85 NTSTATUS
  86 ObmCloseHandle(
  87   PUSER_HANDLE_TABLE HandleTable,
  88   HANDLE Handle);
  89
  90 VOID
  91 ObmInitializeHandleTable(
  92   PUSER_HANDLE_TABLE HandleTable);
  93
  94 VOID
  95 ObmFreeHandleTable(
  96   PUSER_HANDLE_TABLE HandleTable);
  97
  98 PUSER_HANDLE_TABLE
  99 ObmCreateHandleTable(VOID);
 100
 101 VOID
 102 ObmDestroyHandleTable(
 103   PUSER_HANDLE_TABLE HandleTable);
 104
 105 #endif /* __WIN32K_OBJECT_H */
 106
 107 /* EOF */