Class GuidFFM

java.lang.Object

oshi.ffm.windows.com.GuidFFM

public final class GuidFFM
extends Object

FFM representation of the Windows GUID structure.

A GUID (Globally Unique Identifier) is a 128-bit value used to identify COM interfaces and classes.

Field Summary

Fields

Modifier and Type	Field	Description
static final StructLayout	LAYOUT	The memory layout of a GUID structure (16 bytes).
static final long	SIZE	Size of a GUID in bytes.

Method Summary

Modifier and Type	Method	Description
static MemorySegment	CLSID_WbemLocator(Arena arena)	CLSID_WbemLocator: {4590F811-1D3A-11D0-891F-00AA004B2E24}
static MemorySegment	create(Arena arena, int data1, int data2, int data3, int d4_0, int d4_1, int d4_2, int d4_3, int d4_4, int d4_5, int d4_6, int d4_7)	Creates a GUID memory segment from its components using integer values for convenience.
static MemorySegment	create(Arena arena, int data1, short data2, short data3, byte... data4)	Creates a GUID memory segment from its components.
static MemorySegment	IID_IUnknown(Arena arena)	IID_IUnknown: {00000000-0000-0000-C000-000000000046}
static MemorySegment	IID_IWbemLocator(Arena arena)	IID_IWbemLocator: {DC12A687-737F-11CF-884D-00AA004B2E24}

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

LAYOUT

public static final StructLayout LAYOUT

The memory layout of a GUID structure (16 bytes).

SIZE

public static final long SIZE

Size of a GUID in bytes.

Method Details

create

public static MemorySegment create(Arena arena,
 int data1,
 short data2,
 short data3,
 byte... data4)

Creates a GUID memory segment from its components.

Parameters:

arena - the arena for memory allocation

data1 - the first 4 bytes (big-endian)

data2 - the next 2 bytes (big-endian)

data3 - the next 2 bytes (big-endian)

data4 - the remaining 8 bytes

Returns:

a memory segment containing the GUID

create

public static MemorySegment create(Arena arena,
 int data1,
 int data2,
 int data3,
 int d4_0,
 int d4_1,
 int d4_2,
 int d4_3,
 int d4_4,
 int d4_5,
 int d4_6,
 int d4_7)

Creates a GUID memory segment from its components using integer values for convenience.

Parameters:

arena - the arena for memory allocation

data1 - the first 4 bytes

data2 - the next 2 bytes

data3 - the next 2 bytes

d4_0 - data4[0]

d4_1 - data4[1]

d4_2 - data4[2]

d4_3 - data4[3]

d4_4 - data4[4]

d4_5 - data4[5]

d4_6 - data4[6]

d4_7 - data4[7]

Returns:

a memory segment containing the GUID

CLSID_WbemLocator

public static MemorySegment CLSID_WbemLocator(Arena arena)

CLSID_WbemLocator: {4590F811-1D3A-11D0-891F-00AA004B2E24}

Parameters:

arena - the arena for memory allocation

Returns:

a memory segment containing the CLSID_WbemLocator GUID

IID_IWbemLocator

public static MemorySegment IID_IWbemLocator(Arena arena)

IID_IWbemLocator: {DC12A687-737F-11CF-884D-00AA004B2E24}

Parameters:

arena - the arena for memory allocation

Returns:

a memory segment containing the IID_IWbemLocator GUID

IID_IUnknown

public static MemorySegment IID_IUnknown(Arena arena)

IID_IUnknown: {00000000-0000-0000-C000-000000000046}

Parameters:

arena - the arena for memory allocation

Returns:

a memory segment containing the IID_IUnknown GUID