#ifndef _NTIOAPI_H

/**
 * The FILE_IO_PRIORITY_HINT_INFORMATION structure is used to query and set the default IRP priority hint for requests on the specified file handle.
 * \sa https://learn.microsoft.com/en-us/windows-hardware/drivers/ddi/wdm/ns-wdm-_file_io_priority_hint_information
 */
typedef struct DECLSPEC_ALIGN(8) _FILE_IO_PRIORITY_HINT_INFORMATION
{
    IO_PRIORITY_HINT PriorityHint;
} FILE_IO_PRIORITY_HINT_INFORMATION, *PFILE_IO_PRIORITY_HINT_INFORMATION;

#endif
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// wdm.h

typedef struct _FILE_IO_PRIORITY_HINT_INFORMATION {
  IO_PRIORITY_HINT PriorityHint;
} FILE_IO_PRIORITY_HINT_INFORMATION, *PFILE_IO_PRIORITY_HINT_INFORMATION;
View the official Windows Driver Kit DDI reference

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This structure is documented in Windows Driver Kit.

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Windows Driver Kit DDI reference (ns-wdm-_file_io_priority_hint_information)

_FILE_IO_PRIORITY_HINT_INFORMATION structure

Description

The FILE_IO_PRIORITY_HINT_INFORMATION structure is used by the ZwQueryInformationFile and ZwSetInformationFile routines to query and set the default IRP priority hint for requests on the specified file handle.

Members

`PriorityHint`

Specifies the IO_PRIORITY_HINT value that indicates the priority hint for a file handle.

Remarks

For more information about priority hints, see Using IRP Priority Hints.

FILE_IO_PRIORITY_HINT_INFORMATION - NtDoc