Geoff Chappell - Software Analyst
The KWAIT_STATUS_REGISTER union (formally _KWAIT_STATUS_REGISTER) was introduced for Windows 7. It has no known purpose outside the KTHREAD, which has one as its WaitRegister member. The union is of a UCHAR named Flags with a structure of UCHAR bit fields:
| Mask | Definition | Versions |
|---|---|---|
| 0x03 (6.1 to 6.3); 0x07 |
UCHAR State : 2; |
6.1 to 6.3 |
UCHAR State : 3; |
10.0 and higher | |
| 0x04 (6.1 to 6.3); 0x08 |
UCHAR Affinity : 1; |
6.1 and higher |
| 0x08 (6.1 to 6.3); 0x10 |
UCHAR Priority : 1; |
6.1 and higher |
| 0x10 (6.1 to 6.3); 0x20 |
UCHAR Apc : 1; |
6.1 and higher |
| 0x20 (6.1 to 6.3); 0x40 |
UCHAR UserApc : 1; |
6.1 and higher |
| 0x40 (6.1 to 6.3); 0x80 |
UCHAR Alert : 1; |
6.1 and higher |
UCHAR Unused : 1; |
6.1 to 6.3 |
The multi-bit State takes its values from the KWAIT_STATE enumeration.