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GetProcessGroupAffinity function

Retrieves the processor group affinity of the specified process.

Syntax


BOOL GetProcessGroupAffinity(
  _In_     HANDLE hProcess,
  _Inout_  PUSHORT GroupCount,
  _Out_    PUSHORT GroupArray
);

Parameters

hProcess [in]

A handle to the process.

This handle must have the PROCESS_QUERY_INFORMATION or PROCESS_QUERY_LIMITED_INFORMATION access right. For more information, see Process Security and Access Rights.

GroupCount [in, out]

On input, specifies the number of elements in GroupArray array. On output, specifies the number of processor groups written to the array. If the array is too small, the function fails with ERROR_INSUFFICIENT_BUFFER and sets the GroupCount parameter to the number of elements required.

GroupArray [out]

An array of processor group numbers. A group number is included in the array if a thread in the process is assigned to a processor in the group.

Return value

If the function succeeds, the return value is nonzero.

If the function fails, the return value is zero. To get extended error information, use GetLastError.

If the error value is ERROR_INSUFFICIENT_BUFFER, the GroupCount parameter contains the required buffer size in number of elements.

Remarks

To compile an application that uses this function, set _WIN32_WINNT >= 0x0601. For more information, see Using the Windows Headers.

Requirements

Minimum supported client

Windows 7 [desktop apps only]

Minimum supported server

Windows Server 2008 R2 [desktop apps only]

Header

WinBase.h on Windows 7, Windows Server 2008, and Windows Server 2008 R2 (include Windows.h);
Processtopologyapi.h on Windows 8 and Windows Server 2012

Library

Kernel32.lib

DLL

Kernel32.dll

See also

GetThreadGroupAffinity
Processor Groups

 

 

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