#ifndef _NTRTL_H

typedef struct _RTL_SEGMENT_HEAP_PARAMETERS
{
    USHORT Version;
    USHORT Size;
    ULONG Flags;
    RTL_SEGMENT_HEAP_MEMORY_SOURCE MemorySource;
    SIZE_T Reserved[4];
} RTL_SEGMENT_HEAP_PARAMETERS, *PRTL_SEGMENT_HEAP_PARAMETERS;

#endif
View code on GitHub

// ntifs.h

typedef struct _RTL_SEGMENT_HEAP_PARAMETERS {
  USHORT                         Version;
  USHORT                         Size;
  ULONG                          Flags;
  RTL_SEGMENT_HEAP_MEMORY_SOURCE MemorySource;
  SIZE_T                         Reserved[4];
} RTL_SEGMENT_HEAP_PARAMETERS, *PRTL_SEGMENT_HEAP_PARAMETERS;
View the official Windows Driver Kit DDI reference

NtDoc

This structure is documented in Windows Driver Kit.

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Windows Driver Kit DDI reference (ns-ntifs-_rtl_segment_heap_parameters)

_RTL_SEGMENT_HEAP_PARAMETERS structure

The RTL_SEGMENT_HEAP_PARAMETERS structure contains the segment heap parameters.

Description

Members

`Version`

Contains the size of this structure, in bytes. The value of this member will change as members are added to the structure.

`Size`

Specifies the total size of the data returned, in bytes. This may include data that follows this structure.

`Flags`

The flags associated with the segment heap.

`MemorySource`

Specifies the memory source of the Segment heap.

`Reserved`

Reserved.

RTL_SEGMENT_HEAP_PARAMETERS - NtDoc