/**
 * This file has no copyright assigned and is placed in the Public Domain.
 * This file is part of the mingw-w64 runtime package.
 * No warranty is given; refer to the file DISCLAIMER.PD within this package.
 */

#ifndef _EMI_
#define _EMI_

#if (NTDDI_VERSION >= NTDDI_WINBLUE)

#if WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)

DEFINE_GUID(GUID_DEVICE_ENERGY_METER, 0x45bd8344, 0x7ed6, 0x49cf, 0xa4, 0x40, 0xc2, 0x76, 0xc9, 0x33, 0xb0, 0x53);

#define IOCTL_EMI_GET_VERSION CTL_CODE(FILE_DEVICE_UNKNOWN, 0, METHOD_BUFFERED, FILE_READ_ACCESS)
#define IOCTL_EMI_GET_METADATA_SIZE CTL_CODE(FILE_DEVICE_UNKNOWN, 1, METHOD_BUFFERED, FILE_READ_ACCESS)
#define IOCTL_EMI_GET_METADATA CTL_CODE(FILE_DEVICE_UNKNOWN, 2, METHOD_BUFFERED, FILE_READ_ACCESS)
#define IOCTL_EMI_GET_MEASUREMENT CTL_CODE(FILE_DEVICE_UNKNOWN, 3, METHOD_BUFFERED, FILE_READ_ACCESS)

#define EMI_NAME_MAX 16

#define EMI_VERSION_V1 1
#define EMI_VERSION_V2 2

typedef enum {
  EmiMeasurementUnitPicowattHours
} EMI_MEASUREMENT_UNIT;

typedef struct {
  USHORT EmiVersion;
} EMI_VERSION;

typedef struct {
  ULONG MetadataSize;
} EMI_METADATA_SIZE;

typedef struct {
  ULONGLONG AbsoluteEnergy;
  ULONGLONG AbsoluteTime;
} EMI_CHANNEL_MEASUREMENT_DATA;

typedef struct {
  EMI_MEASUREMENT_UNIT MeasurementUnit;
  WCHAR HardwareOEM[EMI_NAME_MAX];
  WCHAR HardwareModel[EMI_NAME_MAX];
  USHORT HardwareRevision;
  USHORT MeteredHardwareNameSize;
  WCHAR MeteredHardwareName[ANYSIZE_ARRAY];
} EMI_METADATA_V1;

typedef EMI_CHANNEL_MEASUREMENT_DATA EMI_MEASUREMENT_DATA_V1;

typedef EMI_METADATA_V1 EMI_METADATA;
typedef EMI_MEASUREMENT_DATA_V1 EMI_MEASUREMENT_DATA;

typedef struct {
  EMI_MEASUREMENT_UNIT MeasurementUnit;
  USHORT ChannelNameSize;
  WCHAR ChannelName[ANYSIZE_ARRAY];
} EMI_CHANNEL_V2;

typedef struct {
  WCHAR HardwareOEM[EMI_NAME_MAX];
  WCHAR HardwareModel[EMI_NAME_MAX];
  USHORT HardwareRevision;
  USHORT ChannelCount;
  EMI_CHANNEL_V2 Channels[ANYSIZE_ARRAY];
} EMI_METADATA_V2;

typedef struct {
  EMI_CHANNEL_MEASUREMENT_DATA ChannelData[ANYSIZE_ARRAY];
} EMI_MEASUREMENT_DATA_V2;

#define EMI_CHANNEL_V2_LENGTH(_ChannelNameSize) (FIELD_OFFSET(EMI_CHANNEL_V2, ChannelName) + (_ChannelNameSize))

#define EMI_CHANNEL_V2_NEXT_CHANNEL(_Channel) ((EMI_CHANNEL_V2 *)((PUCHAR)(_Channel) + EMI_CHANNEL_V2_LENGTH((_Channel)->ChannelNameSize)))

#endif /* WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP) */

#endif /* (NTDDI_VERSION >= NTDDI_WINBLUE) */

#endif /* _EMI_ */