#ifndef _NTMMAPI_H

/**
 * The MEMORY_REGION_INFORMATION_TYPE union decodes the region-type bitfield returned by MemoryRegionInformationEx.
 *
 * The union overlays the 32-bit RegionType member of MEMORY_REGION_INFORMATION
 * and MEMORY_REGION_INFORMATION_EX with individual allocation-type and page-size
 * indicators. A set bit describes the corresponding property of the allocation.
 */
typedef union _MEMORY_REGION_INFORMATION_TYPE
{
    ULONG RegionType;                           // Combined 32-bit region-type flags returned by class 7.
    struct
    {
        ULONG Private : 1;                      // Bit 0: Private allocation belonging to the process.
        ULONG MappedDataFile : 1;               // Bit 1: Mapped view of a data file.
        ULONG MappedImage : 1;                  // Bit 2: Mapped view of an executable image.
        ULONG MappedPageFile : 1;               // Bit 3: Mapped view of a pagefile-backed section.
        ULONG MappedPhysical : 1;               // Bit 4: View of the physical-memory section.
        ULONG DirectMapped : 1;                 // Bit 5: Mapped view of a direct-mapped file.
        ULONG SoftwareEnclave : 1;              // Bit 6: Software-enclave allocation. Since REDSTONE3.
        ULONG PageSize64K : 1;                  // Bit 7: Uses 65536-byte pages.
        ULONG PlaceholderReservation : 1;       // Bit 8: Placeholder reservation. Since REDSTONE4.
        ULONG MappedAwe : 1;                    // Bit 9: Address Windowing Extensions (AWE) allocation. Since 21H1.
        ULONG MappedWriteWatch : 1;             // Bit 10: Allocation uses write-watch tracking.
        ULONG PageSizeLarge : 1;                // Bit 11: Uses large pages (2097152 bytes on the verified x64 build).
        ULONG PageSizeHuge : 1;                 // Bit 12: Uses huge pages (1073741824 bytes on the verified x64 build).
        ULONG Reserved : 19;                    // Bits 13 through 31: Reserved; do not interpret.
    } DUMMYSTRUCTNAME;
} MEMORY_REGION_INFORMATION_TYPE, *PMEMORY_REGION_INFORMATION_TYPE;

#endif
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