holoscan.resources

This module provides a Python API to underlying C++ API Resources.

class holoscan.resources.Allocator

Bases: holoscan.gxf._gxf.GXFResource

Base allocator class.

Attributes

args	The list of arguments associated with the component.
block_size	Get the block size of the allocator.
description	YAML formatted string describing the resource.
fragment	Fragment that the resource belongs to.
gxf_cid	The GXF component ID.
gxf_cname	The name of the component.
gxf_context	The GXF context of the component.
gxf_eid	The GXF entity ID.
gxf_typename	The GXF type name of the component.
id	The identifier of the component.
name	The name of the resource.
resource_type	Resource type.

spec

Methods

add_arg(*args, **kwargs)	Overloaded function.
allocate(self, size, type)	Allocate the requested amount of memory.
free(self, pointer)	Free the allocated memory
gxf_initialize(self)	Initialize the component.
initialize(self)	initialization method for the resource.
is_available(self, size)	Boolean representing whether the resource is available.
service(self, service_type[, id])	Retrieve a registered fragment service through the component's fragment.
setup(self, arg0)	setup method for the resource.

ResourceType

class ResourceType

Bases: pybind11_builtins.pybind11_object

Members:

NATIVE

GXF

Attributes

name

value

GXF = <ResourceType.GXF: 1>

NATIVE = <ResourceType.NATIVE: 0>

__init__(self: holoscan.core._core.Resource.ResourceType, value: int) → None

property name

property value

__init__(self: holoscan.resources._resources.Allocator) → None

Base allocator class.

add_arg(*args, **kwargs)

Overloaded function.

1. add_arg(self: holoscan.core._core.ComponentBase, arg: holoscan.core._core.Arg) -> None

Add an argument to the component.

2. add_arg(self: holoscan.core._core.ComponentBase, arg: holoscan.core._core.ArgList) -> None

Add a list of arguments to the component.

allocate(self: holoscan.resources._resources.Allocator, size: int, type: holoscan.resources._resources.MemoryStorageType) → int

Allocate the requested amount of memory.

Parameters

sizeint

The amount of memory to allocate

typeholoscan.resources.MemoryStorageType

Enum representing the type of memory to allocate.

Returns

Opaque PyCapsule object representing a std::byte* pointer to the allocated memory.

property args

The list of arguments associated with the component.

Returns

arglistholoscan.core.ArgList

property block_size

Get the block size of the allocator.

Returns

int

The block size of the allocator. Returns 1 for byte-based allocators.

property description

YAML formatted string describing the resource.

property fragment

Fragment that the resource belongs to.

Returns

nameholoscan.core.Fragment

free(self: holoscan.resources._resources.Allocator, pointer: int) → None

Free the allocated memory

Parameters

pointerPyCapsule

Opaque PyCapsule object representing a std::byte* pointer to the allocated memory.

property gxf_cid

The GXF component ID.

property gxf_cname

The name of the component.

property gxf_context

The GXF context of the component.

property gxf_eid

The GXF entity ID.

gxf_initialize(self: holoscan.gxf._gxf.GXFComponent) → None

Initialize the component.

property gxf_typename

The GXF type name of the component.

Returns

str

The GXF type name of the component.

property id

The identifier of the component.

The identifier is initially set to -1, and will become a valid value when the component is initialized.

With the default executor (holoscan.gxf.GXFExecutor), the identifier is set to the GXF component ID.

Returns

idint

initialize(self: holoscan.core._core.Resource) → None

initialization method for the resource.

is_available(self: holoscan.resources._resources.Allocator, size: int) → bool

Boolean representing whether the resource is available.

Returns

bool

Availability of the resource.

property name

The name of the resource.

Returns

namestr

property resource_type

Resource type.

holoscan.core.Resource.ResourceType enum representing the type of the resource. The two types currently implemented are NATIVE and GXF.

service(self: object, service_type: type, id: str = '') → object

Retrieve a registered fragment service through the component’s fragment.

This method delegates to the fragment’s service() method to retrieve a previously registered fragment service by its type and optional identifier. Returns None if no fragment service is found with the specified type and identifier.

Parameters

service_typetype

The type of the fragment service to retrieve. Must be a type that inherits from Resource or FragmentService.

idstr, optional

The identifier of the fragment service. If empty, retrieves by service type only. For Resources, this would typically be the resource’s name.

Returns

object or None

The fragment service instance of the requested type, or None if not found. If the service wraps a Resource and a Resource type is requested, the unwrapped Resource instance is returned.

Raises

RuntimeError

If the component has no associated fragment or if the fragment’s service method cannot be accessed.

Notes

This is a convenience method that internally calls the fragment’s service() method. For services that wrap Resources, the method will automatically unwrap and return the Resource if a Resource type is requested.

setup(self: holoscan.core._core.Resource, arg0: holoscan.core._core.ComponentSpec) → None

setup method for the resource.

property spec

class holoscan.resources.AsyncBufferReceiver

Bases: holoscan.resources._resources.Receiver

Receiver using an asynchronous buffer.

The latest message is received asynchronously.

Parameters

fragmentholoscan.core.Fragment

The fragment to assign the resource to.

namestr, optional

The name of the receiver.

Attributes

args	The list of arguments associated with the component.
back_size	The size of the receiver queue's back stage.
capacity	The capacity of the receiver queue's main stage.
description	YAML formatted string describing the resource.
fragment	Fragment that the resource belongs to.
gxf_cid	The GXF component ID.
gxf_cname	The name of the component.
gxf_context	The GXF context of the component.
gxf_eid	The GXF entity ID.
gxf_typename	The GXF type name of the component.
id	The identifier of the component.
name	The name of the resource.
resource_type	Resource type.
size	The size of the receiver queue's main stage.

spec

Methods

add_arg(*args, **kwargs)	Overloaded function.
gxf_initialize(self)	Initialize the component.
initialize(self)	initialization method for the resource.
service(self, service_type[, id])	Retrieve a registered fragment service through the component's fragment.
setup(self, arg0)	setup method for the resource.

ResourceType

class ResourceType

Bases: pybind11_builtins.pybind11_object

Members:

NATIVE

GXF

Attributes

name

value

GXF = <ResourceType.GXF: 1>

NATIVE = <ResourceType.NATIVE: 0>

__init__(self: holoscan.core._core.Resource.ResourceType, value: int) → None

property name

property value

__init__(self: holoscan.resources._resources.AsyncBufferReceiver, fragment: holoscan.core._core.Fragment, name: str = 'async_buffer_receiver') → None

Receiver using an asynchronous buffer.

The latest message is received asynchronously.

Parameters

fragmentholoscan.core.Fragment

The fragment to assign the resource to.

namestr, optional

The name of the receiver.

add_arg(*args, **kwargs)

Overloaded function.

1. add_arg(self: holoscan.core._core.ComponentBase, arg: holoscan.core._core.Arg) -> None

Add an argument to the component.

2. add_arg(self: holoscan.core._core.ComponentBase, arg: holoscan.core._core.ArgList) -> None

Add a list of arguments to the component.

property args

The list of arguments associated with the component.

Returns

arglistholoscan.core.ArgList

property back_size

The size of the receiver queue’s back stage.

property capacity

The capacity of the receiver queue’s main stage.

property description

YAML formatted string describing the resource.

property fragment

Fragment that the resource belongs to.

Returns

nameholoscan.core.Fragment

property gxf_cid

The GXF component ID.

property gxf_cname

The name of the component.

property gxf_context

The GXF context of the component.

property gxf_eid

The GXF entity ID.

gxf_initialize(self: holoscan.gxf._gxf.GXFComponent) → None

Initialize the component.

property gxf_typename

The GXF type name of the component.

Returns

str

The GXF type name of the component.

property id

The identifier of the component.

The identifier is initially set to -1, and will become a valid value when the component is initialized.

With the default executor (holoscan.gxf.GXFExecutor), the identifier is set to the GXF component ID.

Returns

idint

initialize(self: holoscan.core._core.Resource) → None

initialization method for the resource.

property name

The name of the resource.

Returns

namestr

property resource_type

Resource type.

holoscan.core.Resource.ResourceType enum representing the type of the resource. The two types currently implemented are NATIVE and GXF.

service(self: object, service_type: type, id: str = '') → object

Retrieve a registered fragment service through the component’s fragment.

This method delegates to the fragment’s service() method to retrieve a previously registered fragment service by its type and optional identifier. Returns None if no fragment service is found with the specified type and identifier.

Parameters

service_typetype

The type of the fragment service to retrieve. Must be a type that inherits from Resource or FragmentService.

idstr, optional

The identifier of the fragment service. If empty, retrieves by service type only. For Resources, this would typically be the resource’s name.

Returns

object or None

The fragment service instance of the requested type, or None if not found. If the service wraps a Resource and a Resource type is requested, the unwrapped Resource instance is returned.

Raises

RuntimeError

If the component has no associated fragment or if the fragment’s service method cannot be accessed.

Notes

This is a convenience method that internally calls the fragment’s service() method. For services that wrap Resources, the method will automatically unwrap and return the Resource if a Resource type is requested.

setup(self: holoscan.core._core.Resource, arg0: holoscan.core._core.ComponentSpec) → None

setup method for the resource.

property size

The size of the receiver queue’s main stage.

property spec

class holoscan.resources.AsyncBufferTransmitter

Bases: holoscan.resources._resources.Transmitter

Transmitter using an asynchronous buffer.

The latest message is pushed asynchronously.

Parameters

fragmentholoscan.core.Fragment

The fragment to assign the resource to.

namestr, optional

The name of the transmitter.

Attributes

args	The list of arguments associated with the component.
back_size	The size of the transmitter queue's back stage.
capacity	The capacity of the transmitter queue's main stage.
description	YAML formatted string describing the resource.
fragment	Fragment that the resource belongs to.
gxf_cid	The GXF component ID.
gxf_cname	The name of the component.
gxf_context	The GXF context of the component.
gxf_eid	The GXF entity ID.
gxf_typename	The GXF type name of the component.
id	The identifier of the component.
name	The name of the resource.
resource_type	Resource type.
size	The size of the transmitter queue's main stage.

spec

Methods

add_arg(*args, **kwargs)	Overloaded function.
gxf_initialize(self)	Initialize the component.
initialize(self)	initialization method for the resource.
service(self, service_type[, id])	Retrieve a registered fragment service through the component's fragment.
setup(self, arg0)	setup method for the resource.

ResourceType

class ResourceType

Bases: pybind11_builtins.pybind11_object

Members:

NATIVE

GXF

Attributes

name

value

GXF = <ResourceType.GXF: 1>

NATIVE = <ResourceType.NATIVE: 0>

__init__(self: holoscan.core._core.Resource.ResourceType, value: int) → None

property name

property value

__init__(self: holoscan.resources._resources.AsyncBufferTransmitter, fragment: holoscan.core._core.Fragment, name: str = 'async_buffer_transmitter') → None

Transmitter using an asynchronous buffer.

The latest message is pushed asynchronously.

Parameters

fragmentholoscan.core.Fragment

The fragment to assign the resource to.

namestr, optional

The name of the transmitter.

add_arg(*args, **kwargs)

Overloaded function.

1. add_arg(self: holoscan.core._core.ComponentBase, arg: holoscan.core._core.Arg) -> None

Add an argument to the component.

2. add_arg(self: holoscan.core._core.ComponentBase, arg: holoscan.core._core.ArgList) -> None

Add a list of arguments to the component.

property args

The list of arguments associated with the component.

Returns

arglistholoscan.core.ArgList

property back_size

The size of the transmitter queue’s back stage.

property capacity

The capacity of the transmitter queue’s main stage.

property description

YAML formatted string describing the resource.

property fragment

Fragment that the resource belongs to.

Returns

nameholoscan.core.Fragment

property gxf_cid

The GXF component ID.

property gxf_cname

The name of the component.

property gxf_context

The GXF context of the component.

property gxf_eid

The GXF entity ID.

gxf_initialize(self: holoscan.gxf._gxf.GXFComponent) → None

Initialize the component.

property gxf_typename

The GXF type name of the component.

Returns

str

The GXF type name of the component.

property id

The identifier of the component.

The identifier is initially set to -1, and will become a valid value when the component is initialized.

With the default executor (holoscan.gxf.GXFExecutor), the identifier is set to the GXF component ID.

Returns

idint

initialize(self: holoscan.core._core.Resource) → None

initialization method for the resource.

property name

The name of the resource.

Returns

namestr

property resource_type

Resource type.

holoscan.core.Resource.ResourceType enum representing the type of the resource. The two types currently implemented are NATIVE and GXF.

service(self: object, service_type: type, id: str = '') → object

Retrieve a registered fragment service through the component’s fragment.

This method delegates to the fragment’s service() method to retrieve a previously registered fragment service by its type and optional identifier. Returns None if no fragment service is found with the specified type and identifier.

Parameters

service_typetype

The type of the fragment service to retrieve. Must be a type that inherits from Resource or FragmentService.

idstr, optional

The identifier of the fragment service. If empty, retrieves by service type only. For Resources, this would typically be the resource’s name.

Returns

object or None

The fragment service instance of the requested type, or None if not found. If the service wraps a Resource and a Resource type is requested, the unwrapped Resource instance is returned.

Raises

RuntimeError

If the component has no associated fragment or if the fragment’s service method cannot be accessed.

Notes

This is a convenience method that internally calls the fragment’s service() method. For services that wrap Resources, the method will automatically unwrap and return the Resource if a Resource type is requested.

setup(self: holoscan.core._core.Resource, arg0: holoscan.core._core.ComponentSpec) → None

setup method for the resource.

property size

The size of the transmitter queue’s main stage.

property spec

class holoscan.resources.BlockMemoryPool

Bases: holoscan.resources._resources.Allocator

Block memory pool resource.

Provides a maximum number of equally sized blocks of memory.

Parameters

fragmentholoscan.core.Fragment

The fragment to assign the resource to.

storage_typeint or holoscan.resources.MemoryStorageType

The storage type (0=Host, 1=Device, 2=System, 3=CUDA Managed). Here “host” and “system” are both CPU memory, but “host” refers to pinned host memory (allocated via cudaMallocHost) while “system” is memory allocated by standard C++ new. CUDA Managed memory is allocated via CUDA’s managed memory APIs and can be used from both host and device.

block_sizeint

The size of each block in the memory pool (in bytes).

num_blocksint

The number of blocks in the memory pool.

dev_idint

CUDA device ID. Specifies the device on which to create the memory pool.

namestr, optional

The name of the memory pool.

Attributes

args	The list of arguments associated with the component.
block_size	Get the block size of the allocator.
description	YAML formatted string describing the resource.
fragment	Fragment that the resource belongs to.
gxf_cid	The GXF component ID.
gxf_cname	The name of the component.
gxf_context	The GXF context of the component.
gxf_eid	The GXF entity ID.
gxf_typename	The GXF type name of the component.
id	The identifier of the component.
name	The name of the resource.
resource_type	Resource type.

spec

Methods

add_arg(*args, **kwargs)	Overloaded function.
allocate(self, size, type)	Allocate the requested amount of memory.
free(self, pointer)	Free the allocated memory
gxf_initialize(self)	Initialize the component.
initialize(self)	initialization method for the resource.
is_available(self, size)	Boolean representing whether the resource is available.
service(self, service_type[, id])	Retrieve a registered fragment service through the component's fragment.
setup(self, arg0)	setup method for the resource.

ResourceType

class ResourceType

Bases: pybind11_builtins.pybind11_object

Members:

NATIVE

GXF

Attributes

name

value

GXF = <ResourceType.GXF: 1>

NATIVE = <ResourceType.NATIVE: 0>

__init__(self: holoscan.core._core.Resource.ResourceType, value: int) → None

property name

property value

__init__(self: holoscan.resources._resources.BlockMemoryPool, fragment: holoscan.core._core.Fragment, storage_type: int, block_size: int, num_blocks: int, dev_id: int = 0, name: str = 'block_memory_pool') → None

Block memory pool resource.

Provides a maximum number of equally sized blocks of memory.

Parameters

fragmentholoscan.core.Fragment

The fragment to assign the resource to.

storage_typeint or holoscan.resources.MemoryStorageType

The storage type (0=Host, 1=Device, 2=System, 3=CUDA Managed). Here “host” and “system” are both CPU memory, but “host” refers to pinned host memory (allocated via cudaMallocHost) while “system” is memory allocated by standard C++ new. CUDA Managed memory is allocated via CUDA’s managed memory APIs and can be used from both host and device.

block_sizeint

The size of each block in the memory pool (in bytes).

num_blocksint

The number of blocks in the memory pool.

dev_idint

CUDA device ID. Specifies the device on which to create the memory pool.

namestr, optional

The name of the memory pool.

add_arg(*args, **kwargs)

Overloaded function.

1. add_arg(self: holoscan.core._core.ComponentBase, arg: holoscan.core._core.Arg) -> None

Add an argument to the component.

2. add_arg(self: holoscan.core._core.ComponentBase, arg: holoscan.core._core.ArgList) -> None

Add a list of arguments to the component.

allocate(self: holoscan.resources._resources.Allocator, size: int, type: holoscan.resources._resources.MemoryStorageType) → int

Allocate the requested amount of memory.

Parameters

sizeint

The amount of memory to allocate

typeholoscan.resources.MemoryStorageType

Enum representing the type of memory to allocate.

Returns

Opaque PyCapsule object representing a std::byte* pointer to the allocated memory.

property args

The list of arguments associated with the component.

Returns

arglistholoscan.core.ArgList

property block_size

Get the block size of the allocator.

Returns

int

The block size of the allocator. Returns 1 for byte-based allocators.

property description

YAML formatted string describing the resource.

property fragment

Fragment that the resource belongs to.

Returns

nameholoscan.core.Fragment

free(self: holoscan.resources._resources.Allocator, pointer: int) → None

Free the allocated memory

Parameters

pointerPyCapsule

Opaque PyCapsule object representing a std::byte* pointer to the allocated memory.

property gxf_cid

The GXF component ID.

property gxf_cname

The name of the component.

property gxf_context

The GXF context of the component.

property gxf_eid

The GXF entity ID.

gxf_initialize(self: holoscan.gxf._gxf.GXFComponent) → None

Initialize the component.

property gxf_typename

The GXF type name of the component.

Returns

str

The GXF type name of the component.

property id

The identifier of the component.

The identifier is initially set to -1, and will become a valid value when the component is initialized.

With the default executor (holoscan.gxf.GXFExecutor), the identifier is set to the GXF component ID.

Returns

idint

initialize(self: holoscan.core._core.Resource) → None

initialization method for the resource.

is_available(self: holoscan.resources._resources.Allocator, size: int) → bool

Boolean representing whether the resource is available.

Returns

bool

Availability of the resource.

property name

The name of the resource.

Returns

namestr

property resource_type

Resource type.

holoscan.core.Resource.ResourceType enum representing the type of the resource. The two types currently implemented are NATIVE and GXF.

service(self: object, service_type: type, id: str = '') → object

Retrieve a registered fragment service through the component’s fragment.

This method delegates to the fragment’s service() method to retrieve a previously registered fragment service by its type and optional identifier. Returns None if no fragment service is found with the specified type and identifier.

Parameters

service_typetype

The type of the fragment service to retrieve. Must be a type that inherits from Resource or FragmentService.

idstr, optional

The identifier of the fragment service. If empty, retrieves by service type only. For Resources, this would typically be the resource’s name.

Returns

object or None

The fragment service instance of the requested type, or None if not found. If the service wraps a Resource and a Resource type is requested, the unwrapped Resource instance is returned.

Raises

RuntimeError

If the component has no associated fragment or if the fragment’s service method cannot be accessed.

Notes

This is a convenience method that internally calls the fragment’s service() method. For services that wrap Resources, the method will automatically unwrap and return the Resource if a Resource type is requested.

setup(self: holoscan.core._core.Resource, arg0: holoscan.core._core.ComponentSpec) → None

setup method for the resource.

property spec

class holoscan.resources.CudaAllocator

Bases: holoscan.resources._resources.Allocator

Base class for CUDA-based allocators.

Attributes

args	The list of arguments associated with the component.
block_size	Get the block size of the allocator.
description	YAML formatted string describing the resource.
fragment	Fragment that the resource belongs to.
gxf_cid	The GXF component ID.
gxf_cname	The name of the component.
gxf_context	The GXF context of the component.
gxf_eid	The GXF entity ID.
gxf_typename	The GXF type name of the component.
id	The identifier of the component.
name	The name of the resource.
pool_size	Return the memory pool size for the specified storage type.
resource_type	Resource type.

spec

Methods

add_arg(*args, **kwargs)	Overloaded function.
allocate(self, size, type)	Allocate the requested amount of memory.
free(self, pointer)	Free the allocated memory
gxf_initialize(self)	Initialize the component.
initialize(self)	initialization method for the resource.
is_available(self, size)	Boolean representing whether the resource is available.
service(self, service_type[, id])	Retrieve a registered fragment service through the component's fragment.
setup(self, arg0)	setup method for the resource.

ResourceType

class ResourceType

Bases: pybind11_builtins.pybind11_object

Members:

NATIVE

GXF

Attributes

name

value

GXF = <ResourceType.GXF: 1>

NATIVE = <ResourceType.NATIVE: 0>

__init__(self: holoscan.core._core.Resource.ResourceType, value: int) → None

property name

property value

__init__(self: holoscan.resources._resources.CudaAllocator) → None

Base class for CUDA-based allocators.

add_arg(*args, **kwargs)

Overloaded function.

1. add_arg(self: holoscan.core._core.ComponentBase, arg: holoscan.core._core.Arg) -> None

Add an argument to the component.

2. add_arg(self: holoscan.core._core.ComponentBase, arg: holoscan.core._core.ArgList) -> None

Add a list of arguments to the component.

allocate(self: holoscan.resources._resources.Allocator, size: int, type: holoscan.resources._resources.MemoryStorageType) → int

Allocate the requested amount of memory.

Parameters

sizeint

The amount of memory to allocate

typeholoscan.resources.MemoryStorageType

Enum representing the type of memory to allocate.

Returns

Opaque PyCapsule object representing a std::byte* pointer to the allocated memory.

property args

The list of arguments associated with the component.

Returns

arglistholoscan.core.ArgList

property block_size

Get the block size of the allocator.

Returns

int

The block size of the allocator. Returns 1 for byte-based allocators.

property description

YAML formatted string describing the resource.

property fragment

Fragment that the resource belongs to.

Returns

nameholoscan.core.Fragment

free(self: holoscan.resources._resources.Allocator, pointer: int) → None

Free the allocated memory

Parameters

pointerPyCapsule

Opaque PyCapsule object representing a std::byte* pointer to the allocated memory.

property gxf_cid

The GXF component ID.

property gxf_cname

The name of the component.

property gxf_context

The GXF context of the component.

property gxf_eid

The GXF entity ID.

gxf_initialize(self: holoscan.gxf._gxf.GXFComponent) → None

Initialize the component.

property gxf_typename

The GXF type name of the component.

Returns

str

The GXF type name of the component.

property id

The identifier of the component.

The identifier is initially set to -1, and will become a valid value when the component is initialized.

With the default executor (holoscan.gxf.GXFExecutor), the identifier is set to the GXF component ID.

Returns

idint

initialize(self: holoscan.core._core.Resource) → None

initialization method for the resource.

is_available(self: holoscan.resources._resources.Allocator, size: int) → bool

Boolean representing whether the resource is available.

Returns

bool

Availability of the resource.

property name

The name of the resource.

Returns

namestr

property pool_size

Return the memory pool size for the specified storage type.

Parameters

storage_typeholoscan.resources.MemoryStorageType

Enum representing the type of memory to allocate.

Returns

sizeint

The size of the memory pool for the specified storage type.

property resource_type

Resource type.

holoscan.core.Resource.ResourceType enum representing the type of the resource. The two types currently implemented are NATIVE and GXF.

service(self: object, service_type: type, id: str = '') → object

Retrieve a registered fragment service through the component’s fragment.

This method delegates to the fragment’s service() method to retrieve a previously registered fragment service by its type and optional identifier. Returns None if no fragment service is found with the specified type and identifier.

Parameters

service_typetype

The type of the fragment service to retrieve. Must be a type that inherits from Resource or FragmentService.

idstr, optional

The identifier of the fragment service. If empty, retrieves by service type only. For Resources, this would typically be the resource’s name.

Returns

object or None

The fragment service instance of the requested type, or None if not found. If the service wraps a Resource and a Resource type is requested, the unwrapped Resource instance is returned.

Raises

RuntimeError

If the component has no associated fragment or if the fragment’s service method cannot be accessed.

Notes

This is a convenience method that internally calls the fragment’s service() method. For services that wrap Resources, the method will automatically unwrap and return the Resource if a Resource type is requested.

setup(self: holoscan.core._core.Resource, arg0: holoscan.core._core.ComponentSpec) → None

setup method for the resource.

property spec

class holoscan.resources.CudaGreenContext

Bases: holoscan.gxf._gxf.GXFResource

CUDA green context.

Parameters

fragmentholoscan.core.Fragment

The fragment to assign the resource to.

cuda_green_context_poolholoscan.resources.CudaGreenContextPool

The green context pool to use for the green context.

indexint, optional

The index of the green context in the green context pool. If not specified, the default green context will be used.

namestr, optional

The name of the green context.

Attributes

args	The list of arguments associated with the component.
description	YAML formatted string describing the resource.
fragment	Fragment that the resource belongs to.
gxf_cid	The GXF component ID.
gxf_cname	The name of the component.
gxf_context	The GXF context of the component.
gxf_eid	The GXF entity ID.
gxf_typename	The GXF type name of the component.
id	The identifier of the component.
name	The name of the resource.
resource_type	Resource type.

spec

Methods

add_arg(*args, **kwargs)	Overloaded function.
gxf_initialize(self)	Initialize the component.
initialize(self)	initialization method for the resource.
service(self, service_type[, id])	Retrieve a registered fragment service through the component's fragment.
setup(self, arg0)	setup method for the resource.

ResourceType

class ResourceType

Bases: pybind11_builtins.pybind11_object

Members:

NATIVE

GXF

Attributes

name

value

GXF = <ResourceType.GXF: 1>

NATIVE = <ResourceType.NATIVE: 0>

__init__(self: holoscan.core._core.Resource.ResourceType, value: int) → None

property name

property value

__init__(self: holoscan.resources._resources.CudaGreenContext, fragment: holoscan.core._core.Fragment, cuda_green_context_pool: holoscan.resources._resources.CudaGreenContextPool = None, index: int = - 1, name: str = 'cuda_green_context') → None

CUDA green context.

Parameters

fragmentholoscan.core.Fragment

The fragment to assign the resource to.

cuda_green_context_poolholoscan.resources.CudaGreenContextPool

The green context pool to use for the green context.

indexint, optional

The index of the green context in the green context pool. If not specified, the default green context will be used.

namestr, optional

The name of the green context.

add_arg(*args, **kwargs)

Overloaded function.

1. add_arg(self: holoscan.core._core.ComponentBase, arg: holoscan.core._core.Arg) -> None

Add an argument to the component.

2. add_arg(self: holoscan.core._core.ComponentBase, arg: holoscan.core._core.ArgList) -> None

Add a list of arguments to the component.

property args

The list of arguments associated with the component.

Returns

arglistholoscan.core.ArgList

property description

YAML formatted string describing the resource.

property fragment

Fragment that the resource belongs to.

Returns

nameholoscan.core.Fragment

property gxf_cid

The GXF component ID.

property gxf_cname

The name of the component.

property gxf_context

The GXF context of the component.

property gxf_eid

The GXF entity ID.

gxf_initialize(self: holoscan.gxf._gxf.GXFComponent) → None

Initialize the component.

property gxf_typename

The GXF type name of the component.

Returns

str

The GXF type name of the component.

property id

The identifier of the component.

The identifier is initially set to -1, and will become a valid value when the component is initialized.

With the default executor (holoscan.gxf.GXFExecutor), the identifier is set to the GXF component ID.

Returns

idint

initialize(self: holoscan.core._core.Resource) → None

initialization method for the resource.

property name

The name of the resource.

Returns

namestr

property resource_type

Resource type.

holoscan.core.Resource.ResourceType enum representing the type of the resource. The two types currently implemented are NATIVE and GXF.

service(self: object, service_type: type, id: str = '') → object

Retrieve a registered fragment service through the component’s fragment.

This method delegates to the fragment’s service() method to retrieve a previously registered fragment service by its type and optional identifier. Returns None if no fragment service is found with the specified type and identifier.

Parameters

service_typetype

The type of the fragment service to retrieve. Must be a type that inherits from Resource or FragmentService.

idstr, optional

The identifier of the fragment service. If empty, retrieves by service type only. For Resources, this would typically be the resource’s name.

Returns

object or None

The fragment service instance of the requested type, or None if not found. If the service wraps a Resource and a Resource type is requested, the unwrapped Resource instance is returned.

Raises

RuntimeError

If the component has no associated fragment or if the fragment’s service method cannot be accessed.

Notes

This is a convenience method that internally calls the fragment’s service() method. For services that wrap Resources, the method will automatically unwrap and return the Resource if a Resource type is requested.

setup(self: holoscan.core._core.Resource, arg0: holoscan.core._core.ComponentSpec) → None

setup method for the resource.

property spec

class holoscan.resources.CudaGreenContextPool

Bases: holoscan.gxf._gxf.GXFResource

CUDA green context pool.

Parameters

fragmentholoscan.core.Fragment

The fragment to assign the resource to.

dev_idint

CUDA device ID. Specifies the device on which to create the green context pool.

flagsint

Flags for CUDA green contexts in the pool. This will be passed to CUDA’s cuDevSmResourceSplitByCount() [R6eecc797bc1f-1] when creating the green contexts. The default value of 0 indicates no flags are used.

num_partitionsint

The number of partitions to create for the green context pool.

sms_per_partitionlist of int

The number of SMs per partition of the green context pool.

default_context_indexint, optional

The index of the default green context to use. When index < 0, the last partition’s index will be used.

min_sm_sizeint, optional

The minimum number of SMs per partition of the green context pool.

namestr, optional

The name of the green context pool.

References

[1]

https://docs.nvidia.com/cuda/cuda-driver-api/group__CUDA__GREEN__CONTEXTS.html

Attributes

args	The list of arguments associated with the component.
description	YAML formatted string describing the resource.
fragment	Fragment that the resource belongs to.
gxf_cid	The GXF component ID.
gxf_cname	The name of the component.
gxf_context	The GXF context of the component.
gxf_eid	The GXF entity ID.
gxf_typename	The GXF type name of the component.
id	The identifier of the component.
name	The name of the resource.
resource_type	Resource type.

spec

Methods

add_arg(*args, **kwargs)	Overloaded function.
gxf_initialize(self)	Initialize the component.
initialize(self)	initialization method for the resource.
service(self, service_type[, id])	Retrieve a registered fragment service through the component's fragment.
setup(self, arg0)	setup method for the resource.

ResourceType

class ResourceType

Bases: pybind11_builtins.pybind11_object

Members:

NATIVE

GXF

Attributes

name

value

GXF = <ResourceType.GXF: 1>

NATIVE = <ResourceType.NATIVE: 0>

__init__(self: holoscan.core._core.Resource.ResourceType, value: int) → None

property name

property value

__init__(self: holoscan.resources._resources.CudaGreenContextPool, fragment: holoscan.core._core.Fragment, dev_id: int = 0, flags: int = 0, num_partitions: int = 0, sms_per_partition: list[int] = [], default_context_index: int = - 1, min_sm_size: int = 2, name: str = 'cuda_green_context_pool') → None

CUDA green context pool.

Parameters

fragmentholoscan.core.Fragment

The fragment to assign the resource to.

dev_idint

CUDA device ID. Specifies the device on which to create the green context pool.

flagsint

Flags for CUDA green contexts in the pool. This will be passed to CUDA’s cuDevSmResourceSplitByCount() [Re68d62e9478a-1] when creating the green contexts. The default value of 0 indicates no flags are used.

num_partitionsint

The number of partitions to create for the green context pool.

sms_per_partitionlist of int

The number of SMs per partition of the green context pool.

default_context_indexint, optional

The index of the default green context to use. When index < 0, the last partition’s index will be used.

min_sm_sizeint, optional

The minimum number of SMs per partition of the green context pool.

namestr, optional

The name of the green context pool.

References

[1]

https://docs.nvidia.com/cuda/cuda-driver-api/group__CUDA__GREEN__CONTEXTS.html

add_arg(*args, **kwargs)

Overloaded function.

1. add_arg(self: holoscan.core._core.ComponentBase, arg: holoscan.core._core.Arg) -> None

Add an argument to the component.

2. add_arg(self: holoscan.core._core.ComponentBase, arg: holoscan.core._core.ArgList) -> None

Add a list of arguments to the component.

property args

The list of arguments associated with the component.

Returns

arglistholoscan.core.ArgList

property description

YAML formatted string describing the resource.

property fragment

Fragment that the resource belongs to.

Returns

nameholoscan.core.Fragment

property gxf_cid

The GXF component ID.

property gxf_cname

The name of the component.

property gxf_context

The GXF context of the component.

property gxf_eid

The GXF entity ID.

gxf_initialize(self: holoscan.gxf._gxf.GXFComponent) → None

Initialize the component.

property gxf_typename

The GXF type name of the component.

Returns

str

The GXF type name of the component.

property id

The identifier of the component.

The identifier is initially set to -1, and will become a valid value when the component is initialized.

With the default executor (holoscan.gxf.GXFExecutor), the identifier is set to the GXF component ID.

Returns

idint

initialize(self: holoscan.core._core.Resource) → None

initialization method for the resource.

property name

The name of the resource.

Returns

namestr

property resource_type

Resource type.

holoscan.core.Resource.ResourceType enum representing the type of the resource. The two types currently implemented are NATIVE and GXF.

service(self: object, service_type: type, id: str = '') → object

Retrieve a registered fragment service through the component’s fragment.

This method delegates to the fragment’s service() method to retrieve a previously registered fragment service by its type and optional identifier. Returns None if no fragment service is found with the specified type and identifier.

Parameters

service_typetype

The type of the fragment service to retrieve. Must be a type that inherits from Resource or FragmentService.

idstr, optional

The identifier of the fragment service. If empty, retrieves by service type only. For Resources, this would typically be the resource’s name.

Returns

object or None

The fragment service instance of the requested type, or None if not found. If the service wraps a Resource and a Resource type is requested, the unwrapped Resource instance is returned.

Raises

RuntimeError

If the component has no associated fragment or if the fragment’s service method cannot be accessed.

Notes

This is a convenience method that internally calls the fragment’s service() method. For services that wrap Resources, the method will automatically unwrap and return the Resource if a Resource type is requested.

setup(self: holoscan.core._core.Resource, arg0: holoscan.core._core.ComponentSpec) → None

setup method for the resource.

property spec

class holoscan.resources.CudaStreamPool

Bases: holoscan.resources._resources.Allocator

CUDA stream pool.

Parameters

fragmentholoscan.core.Fragment

The fragment to assign the resource to.

dev_idint

CUDA device ID. Specifies the device on which to create the stream pool.

stream_flagsint

Flags for CUDA streams in the pool. This will be passed to CUDA’s cudaStreamCreateWithPriority [R47f67d935b70-1] when creating the streams. The default value of 0 corresponds to cudaStreamDefault. A value of 1 corresponds to cudaStreamNonBlocking, indicating that the stream can run concurrently with work in stream 0 (default stream) and should not perform any implicit synchronization with it.

stream_priorityint

Priority value for CUDA streams in the pool. This is an integer value passed to cudaSreamCreateWithPriority [R47f67d935b70-1]. Lower numbers represent higher priorities.

reserved_sizeint

The number of CUDA streams to initially reserve in the pool (prior to first request).

max_sizeint

The maximum number of streams that can be allocated, unlimited by default.

cuda_green_contextholoscan.resources.CudaGreenContext, optional

The green context to use for the stream pool.

namestr, optional

The name of the stream pool.

References

[1]

https://docs.nvidia.com/cuda/cuda-runtime-api/group__CUDART__STREAM.html

Attributes

args	The list of arguments associated with the component.
block_size	Get the block size of the allocator.
description	YAML formatted string describing the resource.
fragment	Fragment that the resource belongs to.
gxf_cid	The GXF component ID.
gxf_cname	The name of the component.
gxf_context	The GXF context of the component.
gxf_eid	The GXF entity ID.
gxf_typename	The GXF type name of the component.
id	The identifier of the component.
name	The name of the resource.
resource_type	Resource type.

spec

Methods

add_arg(*args, **kwargs)	Overloaded function.
allocate(self, size, type)	Allocate the requested amount of memory.
free(self, pointer)	Free the allocated memory
gxf_initialize(self)	Initialize the component.
initialize(self)	initialization method for the resource.
is_available(self, size)	Boolean representing whether the resource is available.
service(self, service_type[, id])	Retrieve a registered fragment service through the component's fragment.
setup(self, arg0)	setup method for the resource.

ResourceType

class ResourceType

Bases: pybind11_builtins.pybind11_object

Members:

NATIVE

GXF

Attributes

name

value

GXF = <ResourceType.GXF: 1>

NATIVE = <ResourceType.NATIVE: 0>

__init__(self: holoscan.core._core.Resource.ResourceType, value: int) → None

property name

property value

__init__(self: holoscan.resources._resources.CudaStreamPool, fragment: holoscan.core._core.Fragment, dev_id: int = 0, stream_flags: int = 0, stream_priority: int = 0, reserved_size: int = 1, max_size: int = 0, cuda_green_context: holoscan.resources._resources.CudaGreenContext = None, name: str = 'cuda_stream_pool') → None

CUDA stream pool.

Parameters

fragmentholoscan.core.Fragment

The fragment to assign the resource to.

dev_idint

CUDA device ID. Specifies the device on which to create the stream pool.

stream_flagsint

Flags for CUDA streams in the pool. This will be passed to CUDA’s cudaStreamCreateWithPriority [Rb9bddbe55e1a-1] when creating the streams. The default value of 0 corresponds to cudaStreamDefault. A value of 1 corresponds to cudaStreamNonBlocking, indicating that the stream can run concurrently with work in stream 0 (default stream) and should not perform any implicit synchronization with it.

stream_priorityint

Priority value for CUDA streams in the pool. This is an integer value passed to cudaSreamCreateWithPriority [Rb9bddbe55e1a-1]. Lower numbers represent higher priorities.

reserved_sizeint

The number of CUDA streams to initially reserve in the pool (prior to first request).

max_sizeint

The maximum number of streams that can be allocated, unlimited by default.

cuda_green_contextholoscan.resources.CudaGreenContext, optional

The green context to use for the stream pool.

namestr, optional

The name of the stream pool.

References

[1]

https://docs.nvidia.com/cuda/cuda-runtime-api/group__CUDART__STREAM.html

add_arg(*args, **kwargs)

Overloaded function.

1. add_arg(self: holoscan.core._core.ComponentBase, arg: holoscan.core._core.Arg) -> None

Add an argument to the component.

2. add_arg(self: holoscan.core._core.ComponentBase, arg: holoscan.core._core.ArgList) -> None

Add a list of arguments to the component.

allocate(self: holoscan.resources._resources.Allocator, size: int, type: holoscan.resources._resources.MemoryStorageType) → int

Allocate the requested amount of memory.

Parameters

sizeint

The amount of memory to allocate

typeholoscan.resources.MemoryStorageType

Enum representing the type of memory to allocate.

Returns

Opaque PyCapsule object representing a std::byte* pointer to the allocated memory.

property args

The list of arguments associated with the component.

Returns

arglistholoscan.core.ArgList

property block_size

Get the block size of the allocator.

Returns

int

The block size of the allocator. Returns 1 for byte-based allocators.

property description

YAML formatted string describing the resource.

property fragment

Fragment that the resource belongs to.

Returns

nameholoscan.core.Fragment

free(self: holoscan.resources._resources.Allocator, pointer: int) → None

Free the allocated memory

Parameters

pointerPyCapsule

Opaque PyCapsule object representing a std::byte* pointer to the allocated memory.

property gxf_cid

The GXF component ID.

property gxf_cname

The name of the component.

property gxf_context

The GXF context of the component.

property gxf_eid

The GXF entity ID.

gxf_initialize(self: holoscan.gxf._gxf.GXFComponent) → None

Initialize the component.

property gxf_typename

The GXF type name of the component.

Returns

str

The GXF type name of the component.

property id

The identifier of the component.

The identifier is initially set to -1, and will become a valid value when the component is initialized.

With the default executor (holoscan.gxf.GXFExecutor), the identifier is set to the GXF component ID.

Returns

idint

initialize(self: holoscan.core._core.Resource) → None

initialization method for the resource.

is_available(self: holoscan.resources._resources.Allocator, size: int) → bool

Boolean representing whether the resource is available.

Returns

bool

Availability of the resource.

property name

The name of the resource.

Returns

namestr

property resource_type

Resource type.

holoscan.core.Resource.ResourceType enum representing the type of the resource. The two types currently implemented are NATIVE and GXF.

service(self: object, service_type: type, id: str = '') → object

Retrieve a registered fragment service through the component’s fragment.

This method delegates to the fragment’s service() method to retrieve a previously registered fragment service by its type and optional identifier. Returns None if no fragment service is found with the specified type and identifier.

Parameters

service_typetype

The type of the fragment service to retrieve. Must be a type that inherits from Resource or FragmentService.

idstr, optional

The identifier of the fragment service. If empty, retrieves by service type only. For Resources, this would typically be the resource’s name.

Returns

object or None

The fragment service instance of the requested type, or None if not found. If the service wraps a Resource and a Resource type is requested, the unwrapped Resource instance is returned.

Raises

RuntimeError

If the component has no associated fragment or if the fragment’s service method cannot be accessed.

Notes

This is a convenience method that internally calls the fragment’s service() method. For services that wrap Resources, the method will automatically unwrap and return the Resource if a Resource type is requested.

setup(self: holoscan.core._core.Resource, arg0: holoscan.core._core.ComponentSpec) → None

setup method for the resource.

property spec

class holoscan.resources.DoubleBufferReceiver

Bases: holoscan.resources._resources.Receiver

Receiver using a double-buffered queue.

New messages are first pushed to a back stage.

Parameters

fragmentholoscan.core.Fragment

The fragment to assign the resource to.

capacityint, optional

The capacity of the receiver.

policyint, optional

The policy to use (0=pop, 1=reject, 2=fault).

namestr, optional

The name of the receiver.

Attributes

args	The list of arguments associated with the component.
back_size	The size of the receiver queue's back stage.
capacity	The capacity of the receiver queue's main stage.
description	YAML formatted string describing the resource.
fragment	Fragment that the resource belongs to.
gxf_cid	The GXF component ID.
gxf_cname	The name of the component.
gxf_context	The GXF context of the component.
gxf_eid	The GXF entity ID.
gxf_typename	The GXF type name of the component.
id	The identifier of the component.
name	The name of the resource.
resource_type	Resource type.
size	The size of the receiver queue's main stage.

spec

Methods

add_arg(*args, **kwargs)	Overloaded function.
gxf_initialize(self)	Initialize the component.
initialize(self)	initialization method for the resource.
service(self, service_type[, id])	Retrieve a registered fragment service through the component's fragment.
setup(self, arg0)	setup method for the resource.

ResourceType

class ResourceType

Bases: pybind11_builtins.pybind11_object

Members:

NATIVE

GXF

Attributes

name

value

GXF = <ResourceType.GXF: 1>

NATIVE = <ResourceType.NATIVE: 0>

__init__(self: holoscan.core._core.Resource.ResourceType, value: int) → None

property name

property value

__init__(self: holoscan.resources._resources.DoubleBufferReceiver, fragment: holoscan.core._core.Fragment, capacity: int = 1, policy: int = 2, name: str = 'double_buffer_receiver') → None

Receiver using a double-buffered queue.

New messages are first pushed to a back stage.

Parameters

fragmentholoscan.core.Fragment

The fragment to assign the resource to.

capacityint, optional

The capacity of the receiver.

policyint, optional

The policy to use (0=pop, 1=reject, 2=fault).

namestr, optional

The name of the receiver.

add_arg(*args, **kwargs)

Overloaded function.

1. add_arg(self: holoscan.core._core.ComponentBase, arg: holoscan.core._core.Arg) -> None

Add an argument to the component.

2. add_arg(self: holoscan.core._core.ComponentBase, arg: holoscan.core._core.ArgList) -> None

Add a list of arguments to the component.

property args

The list of arguments associated with the component.

Returns

arglistholoscan.core.ArgList

property back_size

The size of the receiver queue’s back stage.

property capacity

The capacity of the receiver queue’s main stage.

property description

YAML formatted string describing the resource.

property fragment

Fragment that the resource belongs to.

Returns

nameholoscan.core.Fragment

property gxf_cid

The GXF component ID.

property gxf_cname

The name of the component.

property gxf_context

The GXF context of the component.

property gxf_eid

The GXF entity ID.

gxf_initialize(self: holoscan.gxf._gxf.GXFComponent) → None

Initialize the component.

property gxf_typename

The GXF type name of the component.

Returns

str

The GXF type name of the component.

property id

The identifier of the component.

The identifier is initially set to -1, and will become a valid value when the component is initialized.

With the default executor (holoscan.gxf.GXFExecutor), the identifier is set to the GXF component ID.

Returns

idint

initialize(self: holoscan.core._core.Resource) → None

initialization method for the resource.

property name

The name of the resource.

Returns

namestr

property resource_type

Resource type.

holoscan.core.Resource.ResourceType enum representing the type of the resource. The two types currently implemented are NATIVE and GXF.

service(self: object, service_type: type, id: str = '') → object

Retrieve a registered fragment service through the component’s fragment.

This method delegates to the fragment’s service() method to retrieve a previously registered fragment service by its type and optional identifier. Returns None if no fragment service is found with the specified type and identifier.

Parameters

service_typetype

The type of the fragment service to retrieve. Must be a type that inherits from Resource or FragmentService.

idstr, optional

The identifier of the fragment service. If empty, retrieves by service type only. For Resources, this would typically be the resource’s name.

Returns

object or None

The fragment service instance of the requested type, or None if not found. If the service wraps a Resource and a Resource type is requested, the unwrapped Resource instance is returned.

Raises

RuntimeError

If the component has no associated fragment or if the fragment’s service method cannot be accessed.

Notes

This is a convenience method that internally calls the fragment’s service() method. For services that wrap Resources, the method will automatically unwrap and return the Resource if a Resource type is requested.

setup(self: holoscan.core._core.Resource, arg0: holoscan.core._core.ComponentSpec) → None

setup method for the resource.

property size

The size of the receiver queue’s main stage.

property spec

class holoscan.resources.DoubleBufferTransmitter

Bases: holoscan.resources._resources.Transmitter

Transmitter using a double-buffered queue.

Messages are pushed to a back stage after they are published.

Parameters

fragmentholoscan.core.Fragment

The fragment to assign the resource to.

capacityint, optional

The capacity of the transmitter.

policyint, optional

The policy to use (0=pop, 1=reject, 2=fault).

namestr, optional

The name of the transmitter.

Attributes

args	The list of arguments associated with the component.
back_size	The size of the transmitter queue's back stage.
capacity	The capacity of the transmitter queue's main stage.
description	YAML formatted string describing the resource.
fragment	Fragment that the resource belongs to.
gxf_cid	The GXF component ID.
gxf_cname	The name of the component.
gxf_context	The GXF context of the component.
gxf_eid	The GXF entity ID.
gxf_typename	The GXF type name of the component.
id	The identifier of the component.
name	The name of the resource.
resource_type	Resource type.
size	The size of the transmitter queue's main stage.

spec

Methods

add_arg(*args, **kwargs)	Overloaded function.
gxf_initialize(self)	Initialize the component.
initialize(self)	initialization method for the resource.
service(self, service_type[, id])	Retrieve a registered fragment service through the component's fragment.
setup(self, arg0)	setup method for the resource.

ResourceType

class ResourceType

Bases: pybind11_builtins.pybind11_object

Members:

NATIVE

GXF

Attributes

name

value

GXF = <ResourceType.GXF: 1>

NATIVE = <ResourceType.NATIVE: 0>

__init__(self: holoscan.core._core.Resource.ResourceType, value: int) → None

property name

property value

__init__(self: holoscan.resources._resources.DoubleBufferTransmitter, fragment: holoscan.core._core.Fragment, capacity: int = 1, policy: int = 2, name: str = 'double_buffer_transmitter') → None

Transmitter using a double-buffered queue.

Messages are pushed to a back stage after they are published.

Parameters

fragmentholoscan.core.Fragment

The fragment to assign the resource to.

capacityint, optional

The capacity of the transmitter.

policyint, optional

The policy to use (0=pop, 1=reject, 2=fault).

namestr, optional

The name of the transmitter.

add_arg(*args, **kwargs)

Overloaded function.

1. add_arg(self: holoscan.core._core.ComponentBase, arg: holoscan.core._core.Arg) -> None

Add an argument to the component.

2. add_arg(self: holoscan.core._core.ComponentBase, arg: holoscan.core._core.ArgList) -> None

Add a list of arguments to the component.

property args

The list of arguments associated with the component.

Returns

arglistholoscan.core.ArgList

property back_size

The size of the transmitter queue’s back stage.

property capacity

The capacity of the transmitter queue’s main stage.

property description

YAML formatted string describing the resource.

property fragment

Fragment that the resource belongs to.

Returns

nameholoscan.core.Fragment

property gxf_cid

The GXF component ID.

property gxf_cname

The name of the component.

property gxf_context

The GXF context of the component.

property gxf_eid

The GXF entity ID.

gxf_initialize(self: holoscan.gxf._gxf.GXFComponent) → None

Initialize the component.

property gxf_typename

The GXF type name of the component.

Returns

str

The GXF type name of the component.

property id

The identifier of the component.

The identifier is initially set to -1, and will become a valid value when the component is initialized.

With the default executor (holoscan.gxf.GXFExecutor), the identifier is set to the GXF component ID.

Returns

idint

initialize(self: holoscan.core._core.Resource) → None

initialization method for the resource.

property name

The name of the resource.

Returns

namestr

property resource_type

Resource type.

holoscan.core.Resource.ResourceType enum representing the type of the resource. The two types currently implemented are NATIVE and GXF.

service(self: object, service_type: type, id: str = '') → object

Retrieve a registered fragment service through the component’s fragment.

This method delegates to the fragment’s service() method to retrieve a previously registered fragment service by its type and optional identifier. Returns None if no fragment service is found with the specified type and identifier.

Parameters

service_typetype

The type of the fragment service to retrieve. Must be a type that inherits from Resource or FragmentService.

idstr, optional

The identifier of the fragment service. If empty, retrieves by service type only. For Resources, this would typically be the resource’s name.

Returns

object or None

The fragment service instance of the requested type, or None if not found. If the service wraps a Resource and a Resource type is requested, the unwrapped Resource instance is returned.

Raises

RuntimeError

If the component has no associated fragment or if the fragment’s service method cannot be accessed.

Notes

This is a convenience method that internally calls the fragment’s service() method. For services that wrap Resources, the method will automatically unwrap and return the Resource if a Resource type is requested.

setup(self: holoscan.core._core.Resource, arg0: holoscan.core._core.ComponentSpec) → None

setup method for the resource.

property size

The size of the transmitter queue’s main stage.

property spec

class holoscan.resources.GXFClock

Bases: holoscan.core._core.ClockInterface, holoscan.gxf._gxf.GXFResource

Attributes

args	The list of arguments associated with the component.
description	YAML formatted string describing the resource.
fragment	Fragment that the resource belongs to.
gxf_cid	The GXF component ID.
gxf_cname	The name of the component.
gxf_context	The GXF context of the component.
gxf_eid	The GXF entity ID.
gxf_typename	The GXF type name of the component.
id	The identifier of the component.
name	The name of the resource.
resource_type	Resource type.

spec

Methods

add_arg(*args, **kwargs)	Overloaded function.
gxf_initialize(self)	Initialize the component.
initialize(self)	initialization method for the resource.
service(self, service_type[, id])	Retrieve a registered fragment service through the component's fragment.
setup(self, arg0)	setup method for the resource.
sleep_for(self, arg0)	Set the scheduler to sleep for a specified duration.
sleep_until(self, target_time_ns)	Set the scheduler to sleep until a specified timestamp.
time(self)	The current time of the clock (in seconds).
timestamp(self)	The current timestamp of the clock (in nanoseconds).

ResourceType

class ResourceType

Bases: pybind11_builtins.pybind11_object

Members:

NATIVE

GXF

Attributes

name

value

GXF = <ResourceType.GXF: 1>

NATIVE = <ResourceType.NATIVE: 0>

__init__(self: holoscan.core._core.Resource.ResourceType, value: int) → None

property name

property value

__init__(*args, **kwargs)

add_arg(*args, **kwargs)

Overloaded function.

1. add_arg(self: holoscan.core._core.ComponentBase, arg: holoscan.core._core.Arg) -> None

Add an argument to the component.

2. add_arg(self: holoscan.core._core.ComponentBase, arg: holoscan.core._core.ArgList) -> None

Add a list of arguments to the component.

property args

The list of arguments associated with the component.

Returns

arglistholoscan.core.ArgList

property description

YAML formatted string describing the resource.

property fragment

Fragment that the resource belongs to.

Returns

nameholoscan.core.Fragment

property gxf_cid

The GXF component ID.

property gxf_cname

The name of the component.

property gxf_context

The GXF context of the component.

property gxf_eid

The GXF entity ID.

gxf_initialize(self: holoscan.gxf._gxf.GXFComponent) → None

Initialize the component.

property gxf_typename

The GXF type name of the component.

Returns

str

The GXF type name of the component.

property id

The identifier of the component.

The identifier is initially set to -1, and will become a valid value when the component is initialized.

With the default executor (holoscan.gxf.GXFExecutor), the identifier is set to the GXF component ID.

Returns

idint

initialize(self: holoscan.core._core.Resource) → None

initialization method for the resource.

property name

The name of the resource.

Returns

namestr

property resource_type

Resource type.

holoscan.core.Resource.ResourceType enum representing the type of the resource. The two types currently implemented are NATIVE and GXF.

service(self: object, service_type: type, id: str = '') → object

Retrieve a registered fragment service through the component’s fragment.

This method delegates to the fragment’s service() method to retrieve a previously registered fragment service by its type and optional identifier. Returns None if no fragment service is found with the specified type and identifier.

Parameters

service_typetype

The type of the fragment service to retrieve. Must be a type that inherits from Resource or FragmentService.

idstr, optional

The identifier of the fragment service. If empty, retrieves by service type only. For Resources, this would typically be the resource’s name.

Returns

object or None

The fragment service instance of the requested type, or None if not found. If the service wraps a Resource and a Resource type is requested, the unwrapped Resource instance is returned.

Raises

RuntimeError

If the component has no associated fragment or if the fragment’s service method cannot be accessed.

Notes

This is a convenience method that internally calls the fragment’s service() method. For services that wrap Resources, the method will automatically unwrap and return the Resource if a Resource type is requested.

setup(self: holoscan.core._core.Resource, arg0: holoscan.core._core.ComponentSpec) → None

setup method for the resource.

sleep_for(self: holoscan.core._core.ClockInterface, arg0: object) → None

Set the scheduler to sleep for a specified duration.

Parameters

duration_nsint

The duration to sleep (in nanoseconds).

sleep_until(self: holoscan.core._core.ClockInterface, target_time_ns: int) → None

Set the scheduler to sleep until a specified timestamp.

Parameters

target_time_nsint

The target timestamp (in nanoseconds).

property spec

time(self: holoscan.core._core.ClockInterface) → float

The current time of the clock (in seconds).

Parameters

timedouble

The current time of the clock (in seconds).

timestamp(self: holoscan.core._core.ClockInterface) → int

The current timestamp of the clock (in nanoseconds).

Parameters

timestampint

The current timestamp of the clock (in nanoseconds).

class holoscan.resources.GXFComponentResource(fragment, *args, **kwargs)

Bases: holoscan.resources._resources.GXFComponentResource

Class that wraps a GXF Component as a Holoscan Resource.

Parameters

fragmentholoscan.core.Fragment (constructor only)

The fragment that the resource belongs to.

gxf_typenamestr

The GXF type name that identifies the specific GXF Component being wrapped.

namestr, optional (constructor only)

The name of the resource. Default value is "gxf_component".

kwargsdict

The additional keyword arguments that can be passed depend on the underlying GXF Component. These parameters can provide further customization and functionality to the resource.

Attributes

args	The list of arguments associated with the component.
description	YAML formatted string describing the resource.
fragment	Fragment that the resource belongs to.
gxf_cid	The GXF component ID.
gxf_cname	The name of the component.
gxf_context	The GXF context of the component.
gxf_eid	The GXF entity ID.
gxf_typename	The GXF type name of the component.
id	The identifier of the component.
name	The name of the resource.
resource_type	Resource type.

spec

Methods

add_arg(*args, **kwargs)	Overloaded function.
gxf_initialize(self)	Initialize the component.
initialize(self)	initialization method for the resource.
service(self, service_type[, id])	Retrieve a registered fragment service through the component's fragment.
setup(self, arg0)	setup method for the resource.

ResourceType

class ResourceType

Bases: pybind11_builtins.pybind11_object

Members:

NATIVE

GXF

Attributes

name

value

GXF = <ResourceType.GXF: 1>

NATIVE = <ResourceType.NATIVE: 0>

__init__(self: holoscan.core._core.Resource.ResourceType, value: int) → None

property name

property value

__init__(*args, **kwargs)

Overloaded function.

1. __init__(self: holoscan.resources._resources.GXFComponentResource) -> None

2. __init__(self: holoscan.resources._resources.GXFComponentResource, component: object, fragment: holoscan.core._core.Fragment, gxf_typename: str, *, name: str = ‘gxf_component’, **kwargs) -> None

Class that wraps a GXF Component as a Holoscan Resource.

Parameters

fragmentholoscan.core.Fragment (constructor only)

The fragment that the resource belongs to.

gxf_typenamestr

The GXF type name that identifies the specific GXF Component being wrapped.

namestr, optional (constructor only)

The name of the resource. Default value is "gxf_component".

kwargsdict

The additional keyword arguments that can be passed depend on the underlying GXF Component. These parameters can provide further customization and functionality to the resource.

add_arg(*args, **kwargs)

Overloaded function.

1. add_arg(self: holoscan.core._core.ComponentBase, arg: holoscan.core._core.Arg) -> None

Add an argument to the component.

2. add_arg(self: holoscan.core._core.ComponentBase, arg: holoscan.core._core.ArgList) -> None

Add a list of arguments to the component.

property args

The list of arguments associated with the component.

Returns

arglistholoscan.core.ArgList

property description

YAML formatted string describing the resource.

property fragment

Fragment that the resource belongs to.

Returns

nameholoscan.core.Fragment

property gxf_cid

The GXF component ID.

property gxf_cname

The name of the component.

property gxf_context

The GXF context of the component.

property gxf_eid

The GXF entity ID.

gxf_initialize(self: holoscan.gxf._gxf.GXFComponent) → None

Initialize the component.

property gxf_typename

The GXF type name of the component.

Returns

str

The GXF type name of the component.

property id

The identifier of the component.

The identifier is initially set to -1, and will become a valid value when the component is initialized.

With the default executor (holoscan.gxf.GXFExecutor), the identifier is set to the GXF component ID.

Returns

idint

initialize(self: holoscan.core._core.Resource) → None

initialization method for the resource.

property name

The name of the resource.

Returns

namestr

property resource_type

Resource type.

holoscan.core.Resource.ResourceType enum representing the type of the resource. The two types currently implemented are NATIVE and GXF.

service(self: object, service_type: type, id: str = '') → object

Retrieve a registered fragment service through the component’s fragment.

This method delegates to the fragment’s service() method to retrieve a previously registered fragment service by its type and optional identifier. Returns None if no fragment service is found with the specified type and identifier.

Parameters

service_typetype

The type of the fragment service to retrieve. Must be a type that inherits from Resource or FragmentService.

idstr, optional

The identifier of the fragment service. If empty, retrieves by service type only. For Resources, this would typically be the resource’s name.

Returns

object or None

The fragment service instance of the requested type, or None if not found. If the service wraps a Resource and a Resource type is requested, the unwrapped Resource instance is returned.

Raises

RuntimeError

If the component has no associated fragment or if the fragment’s service method cannot be accessed.

Notes

This is a convenience method that internally calls the fragment’s service() method. For services that wrap Resources, the method will automatically unwrap and return the Resource if a Resource type is requested.

setup(self: holoscan.core._core.Resource, arg0: holoscan.core._core.ComponentSpec) → None

setup method for the resource.

property spec

class holoscan.resources.ManualClock

Bases: holoscan.resources._resources.GXFClock

Manual clock.

Parameters

fragmentholoscan.core.Fragment

The fragment to assign the resource to.

initial_timestampint, optional

The initial timestamp on the clock (in nanoseconds).

namestr, optional

The name of the clock.

Attributes

args	The list of arguments associated with the component.
description	YAML formatted string describing the resource.
fragment	Fragment that the resource belongs to.
gxf_cid	The GXF component ID.
gxf_cname	The name of the component.
gxf_context	The GXF context of the component.
gxf_eid	The GXF entity ID.
gxf_typename	The GXF type name of the component.
id	The identifier of the component.
name	The name of the resource.
resource_type	Resource type.

spec

Methods

add_arg(*args, **kwargs)	Overloaded function.
gxf_initialize(self)	Initialize the component.
initialize(self)	initialization method for the resource.
service(self, service_type[, id])	Retrieve a registered fragment service through the component's fragment.
setup(self, arg0)	setup method for the resource.
sleep_for(self, duration)	Set the scheduler to sleep for a specified duration.
sleep_until(self, target_time_ns)	Set the scheduler to sleep until a specified timestamp.
time(self)	The current time of the clock (in seconds).
timestamp(self)	The current timestamp of the clock (in nanoseconds).

ResourceType

class ResourceType

Bases: pybind11_builtins.pybind11_object

Members:

NATIVE

GXF

Attributes

name

value

GXF = <ResourceType.GXF: 1>

NATIVE = <ResourceType.NATIVE: 0>

__init__(self: holoscan.core._core.Resource.ResourceType, value: int) → None

property name

property value

__init__(self: holoscan.resources._resources.ManualClock, fragment: holoscan.core._core.Fragment, initial_timestamp: int = 0, name: str = 'manual_clock') → None

Manual clock.

Parameters

fragmentholoscan.core.Fragment

The fragment to assign the resource to.

initial_timestampint, optional

The initial timestamp on the clock (in nanoseconds).

namestr, optional

The name of the clock.

add_arg(*args, **kwargs)

Overloaded function.

1. add_arg(self: holoscan.core._core.ComponentBase, arg: holoscan.core._core.Arg) -> None

Add an argument to the component.

2. add_arg(self: holoscan.core._core.ComponentBase, arg: holoscan.core._core.ArgList) -> None

Add a list of arguments to the component.

property args

The list of arguments associated with the component.

Returns

arglistholoscan.core.ArgList

property description

YAML formatted string describing the resource.

property fragment

Fragment that the resource belongs to.

Returns

nameholoscan.core.Fragment

property gxf_cid

The GXF component ID.

property gxf_cname

The name of the component.

property gxf_context

The GXF context of the component.

property gxf_eid

The GXF entity ID.

gxf_initialize(self: holoscan.gxf._gxf.GXFComponent) → None

Initialize the component.

property gxf_typename

The GXF type name of the component.

Returns

str

The GXF type name of the component.

property id

The identifier of the component.

The identifier is initially set to -1, and will become a valid value when the component is initialized.

With the default executor (holoscan.gxf.GXFExecutor), the identifier is set to the GXF component ID.

Returns

idint

initialize(self: holoscan.core._core.Resource) → None

initialization method for the resource.

property name

The name of the resource.

Returns

namestr

property resource_type

Resource type.

holoscan.core.Resource.ResourceType enum representing the type of the resource. The two types currently implemented are NATIVE and GXF.

service(self: object, service_type: type, id: str = '') → object

Retrieve a registered fragment service through the component’s fragment.

This method delegates to the fragment’s service() method to retrieve a previously registered fragment service by its type and optional identifier. Returns None if no fragment service is found with the specified type and identifier.

Parameters

service_typetype

The type of the fragment service to retrieve. Must be a type that inherits from Resource or FragmentService.

idstr, optional

The identifier of the fragment service. If empty, retrieves by service type only. For Resources, this would typically be the resource’s name.

Returns

object or None

The fragment service instance of the requested type, or None if not found. If the service wraps a Resource and a Resource type is requested, the unwrapped Resource instance is returned.

Raises

RuntimeError

If the component has no associated fragment or if the fragment’s service method cannot be accessed.

Notes

This is a convenience method that internally calls the fragment’s service() method. For services that wrap Resources, the method will automatically unwrap and return the Resource if a Resource type is requested.

setup(self: holoscan.core._core.Resource, arg0: holoscan.core._core.ComponentSpec) → None

setup method for the resource.

sleep_for(self: holoscan.resources._resources.ManualClock, duration: object) → None

Set the scheduler to sleep for a specified duration.

Parameters

duration_nsint or datetime.timedelta

The duration to sleep (in nanoseconds).

sleep_until(self: holoscan.resources._resources.ManualClock, target_time_ns: int) → None

Set the scheduler to sleep until a specified timestamp.

Parameters

target_time_nsint

The target timestamp (in nanoseconds).

property spec

time(self: holoscan.resources._resources.ManualClock) → float

The current time of the clock (in seconds).

Parameters

timedouble

The current time of the clock (in seconds).

timestamp(self: holoscan.resources._resources.ManualClock) → int

The current timestamp of the clock (in nanoseconds).

Parameters

timestampint

The current timestamp of the clock (in nanoseconds).