Difference between revisions of "Techwiki:Win32k/BASEOBJECT"
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The GDI Base Object, which is a header at the top of every GDI Object. | The GDI Base Object, which is a header at the top of every GDI Object. | ||
The structure is called BASEOBJECT and is defined as follows for | The structure is called BASEOBJECT and is defined as follows for | ||
| − | Windows XP | + | Windows XP, Windows 2003 and Vista, same for 64 Bit Versions: |
| + | <source lang="c"> | ||
| + | typedef struct _BASEOBJECT | ||
| + | { | ||
| + | HANDLE hHmgr; // 0x00 | ||
| + | ULONG ulShareCount; // 0x04 | ||
| + | USHORT cExclusiveLock; // 0x08 | ||
| + | USHORT BaseFlags; // 0x0a | ||
| + | PW32THREAD Tid; // 0x0c | ||
| + | } BASEOBJECT, *POBJ; | ||
| − | typedef struct _BASEOBJECT | + | typedef struct _BASEOBJECT DD_BASEOBJECT, *PDD_BASEOBJECT; //(correct?) |
| − | + | </source> | |
| − | |||
| − | |||
| − | |||
| − | |||
| − | |||
| − | |||
| − | + | ''hHmgr'' | |
| + | :Gdi handle for the object, if the object is in the handle table. NULL otherwise. | ||
| − | + | ''ulShareCount'' | |
| + | :Number of references to the object. | ||
| − | BaseFlags | + | ''cExclusiveLock'' |
| + | :Number of exclusive locks held by a thread. These are only held for a short time and only for some of the object types. | ||
| + | |||
| + | ''BaseFlags'' | ||
| + | :0x800 for objects that are allocated from a lookaside list (DC, region, bitmap, palette, font and brush) | ||
| + | |||
| + | == See also == | ||
| + | [[techwiki:win32k/W32THREAD|PW32THREAD]] | ||
Latest revision as of 13:02, 3 April 2011
The GDI Base Object, which is a header at the top of every GDI Object. The structure is called BASEOBJECT and is defined as follows for Windows XP, Windows 2003 and Vista, same for 64 Bit Versions:
typedef struct _BASEOBJECT
{
HANDLE hHmgr; // 0x00
ULONG ulShareCount; // 0x04
USHORT cExclusiveLock; // 0x08
USHORT BaseFlags; // 0x0a
PW32THREAD Tid; // 0x0c
} BASEOBJECT, *POBJ;
typedef struct _BASEOBJECT DD_BASEOBJECT, *PDD_BASEOBJECT; //(correct?)
hHmgr
- Gdi handle for the object, if the object is in the handle table. NULL otherwise.
ulShareCount
- Number of references to the object.
cExclusiveLock
- Number of exclusive locks held by a thread. These are only held for a short time and only for some of the object types.
BaseFlags
- 0x800 for objects that are allocated from a lookaside list (DC, region, bitmap, palette, font and brush)
