MEM_EXTENDED_PARAMETER structure (winnt.h)

Article
07/27/2022

Represents an extended parameter for a function that manages virtual memory.

Syntax

typedef struct MEM_EXTENDED_PARAMETER {
  struct {
    DWORD64 Type : MEM_EXTENDED_PARAMETER_TYPE_BITS;
    DWORD64 Reserved : 64 - MEM_EXTENDED_PARAMETER_TYPE_BITS;
  } DUMMYSTRUCTNAME;
  union {
    DWORD64 ULong64;
    PVOID   Pointer;
    SIZE_T  Size;
    HANDLE  Handle;
    DWORD   ULong;
  } DUMMYUNIONNAME;
} MEM_EXTENDED_PARAMETER, *PMEM_EXTENDED_PARAMETER;

Members

DUMMYSTRUCTNAME

DUMMYSTRUCTNAME.Type

A MEM_EXTENDED_PARAMETER_TYPE value that indicates the type of the parameter.

If Type is set to MemExtendedParameterAddressRequirements, then Pointer must be a pointer to a caller-allocated MEM_ADDRESS_REQUIREMENTS structure that specifies the lowest and highest base address and alignment.

If Type is set to MemExtendedParameterNumaNode, then ULong must be set to the desired node number.

DUMMYSTRUCTNAME.Reserved

Reserved.

DUMMYUNIONNAME

DUMMYUNIONNAME.ULong64

DUMMYUNIONNAME.Pointer

DUMMYUNIONNAME.Size

DUMMYUNIONNAME.Handle

DUMMYUNIONNAME.ULong