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UMS_SYSTEM_THREAD_INFORMATION structure (winbase.h)

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Specifies a UMS scheduler thread, UMS worker thread, or non-UMS thread. The GetUmsSystemThreadInformation function uses this structure.

Warning

As of Windows 11, user-mode scheduling is not supported. All calls fail with the error ERROR_NOT_SUPPORTED.

Syntax

typedef struct _UMS_SYSTEM_THREAD_INFORMATION {
  ULONG UmsVersion;
  union {
    struct {
      ULONG IsUmsSchedulerThread : 1;
      ULONG IsUmsWorkerThread : 1;
    } DUMMYSTRUCTNAME;
    ULONG ThreadUmsFlags;
  } DUMMYUNIONNAME;
} UMS_SYSTEM_THREAD_INFORMATION, *PUMS_SYSTEM_THREAD_INFORMATION;

Members

UmsVersion

The UMS version. This member must be UMS_VERSION.

DUMMYUNIONNAME

DUMMYUNIONNAME.DUMMYSTRUCTNAME

DUMMYUNIONNAME.DUMMYSTRUCTNAME.IsUmsSchedulerThread

A bitfield that specifies a UMS scheduler thread. If IsUmsSchedulerThread is set, IsUmsWorkerThread must be clear.

DUMMYUNIONNAME.DUMMYSTRUCTNAME.IsUmsWorkerThread

A bitfield that specifies a UMS worker thread. If IsUmsWorkerThread is set, IsUmsSchedulerThread must be clear.

DUMMYUNIONNAME.ThreadUmsFlags

Remarks

If both IsUmsSchedulerThread and IsUmsWorkerThread are clear, the structure specifies a non-UMS thread.

Requirements

   
Minimum supported client Windows 7 with SP1 [desktop apps only],Windows 7 (64-bit only) and Windows Server 2008 R2 (64-bit only) with KB977165 installed
Minimum supported server Windows Server 2008 R2 with SP1 [desktop apps only]
Header winbase.h (include Windows.h)