A minified version of cudf::column_device_view for use in JIT kernels. More...

Inheritance diagram for cudf::jit::column_device_view:

Public Member Functions
CUDF_HOST_DEVICE	column_device_view (data_type type, size_type size, void const data, bitmask_type const null_mask, size_type offset, column_device_view *children, size_type num_children)
	Creates an instance of this class using pre-existing device memory pointers to data, nullmask, and offset. More...

template<typename T , CUDF_ENABLE_IF(is_rep_layout_compatible< T >()) >
T	element (size_type element_index) const noexcept
	Returns reference to element at the specified index. More...

template<typename T , CUDF_ENABLE_IF(is_fixed_point< T >()) >
T	element (size_type element_index) const noexcept
	Returns reference to element at the specified index. More...

column_device_view	child (size_type child_index) const noexcept
	Returns the specified child. More...

CUDF_HOST_DEVICE size_type	num_child_columns () const noexcept
	Returns the number of child columns. More...

Public Member Functions inherited from cudf::jit::detail::column_device_view_base
CUDF_HOST_DEVICE	column_device_view_base (data_type type, size_type size, void const data, bitmask_type const null_mask, size_type offset)
	Constructs a column with the specified type, size, data, nullmask and offset. More...

template<typename T = void, CUDF_ENABLE_IF(cuda::std::is_same_v< T, void > or is_rep_layout_compatible< T >()) >
CUDF_HOST_DEVICE T const *	head () const noexcept
	Returns pointer to the base device memory allocation casted to the specified type. More...

template<typename T , CUDF_ENABLE_IF(is_rep_layout_compatible< T >()) >
CUDF_HOST_DEVICE T const *	data () const noexcept
	Returns the underlying data casted to the specified type, plus the offset. More...

CUDF_HOST_DEVICE size_type	size () const noexcept
	Returns the number of elements in the column. More...

CUDF_HOST_DEVICE data_type	type () const noexcept
	Returns the element type. More...

CUDF_HOST_DEVICE bool	nullable () const noexcept
	Indicates whether the column can contain null elements, i.e., if it has an allocated bitmask. More...

CUDF_HOST_DEVICE bitmask_type const *	null_mask () const noexcept
	Returns raw pointer to the underlying bitmask allocation. More...

CUDF_HOST_DEVICE size_type	offset () const noexcept
	Returns the index of the first element relative to the base memory allocation, i.e., what is returned from `head<T>()`. More...

bool	is_valid (size_type element_index) const noexcept
	Returns whether the specified element holds a valid value (i.e., not null). More...

bool	is_valid_nocheck (size_type element_index) const noexcept
	Returns whether the specified element holds a valid value (i.e., not null) More...

bool	is_null (size_type element_index) const noexcept
	Returns whether the specified element is null. More...

bool	is_null_nocheck (size_type element_index) const noexcept
	Returns whether the specified element is null. More...

bitmask_type	get_mask_word (size_type word_index) const noexcept
	Returns the specified bitmask word from the `null_mask()`. More...

Protected Attributes
column_device_view *	d_children = nullptr

size_type	_num_children = 0
	The number of child columns. More...

Protected Attributes inherited from cudf::jit::detail::column_device_view_base
data_type	_type
	Element type. More...

size_type	_size
	Number of elements. More...

void const *	_data
	Pointer to device memory containing elements. More...

bitmask_type const *	_null_mask

size_type	_offset

Detailed Description

A minified version of cudf::column_device_view for use in JIT kernels.

Definition at line 167 of file types.cuh.

Constructor & Destructor Documentation

◆ column_device_view()

CUDF_HOST_DEVICE cudf::jit::column_device_view::column_device_view	(	data_type	type,
		size_type	size,
		void const *	data,
		bitmask_type const *	null_mask,
		size_type	offset,
		column_device_view *	children,
		size_type	num_children
	)

inline

Creates an instance of this class using pre-existing device memory pointers to data, nullmask, and offset.

Parameters

type	The type of the column
size	The number of elements in the column
data	Pointer to the device memory containing the data
null_mask	Pointer to the device memory containing the null bitmask
offset	The index of the first element in the column
children	Pointer to the device memory containing child data
num_children	The number of child columns

Definition at line 181 of file types.cuh.

Member Function Documentation

◆ child()

column_device_view cudf::jit::column_device_view::child ( size_type child_index ) const

inlinenoexcept

Returns the specified child.

Parameters

child_index The index of the desired child

Returns: column_view The requested child column_view

Definition at line 218 of file types.cuh.

◆ element() [1/2]

template<typename T , CUDF_ENABLE_IF(is_rep_layout_compatible< T >()) >

T cudf::jit::column_device_view::element ( size_type element_index ) const

inlinenoexcept

Returns reference to element at the specified index.

If the element at the specified index is NULL, i.e., is_null(element_index) == true, then any attempt to use the result will lead to undefined behavior.

This function accounts for the offset.

This function does not participate in overload resolution if is_rep_layout_compatible<T> is false. Specializations of this function may exist for types T where is_rep_layout_compatible<T> is false.

Template Parameters

T	The element type

Parameters

element_index Position of the desired element

Returns: reference to the element at the specified index

Definition at line 198 of file types.cuh.

◆ element() [2/2]

template<typename T , CUDF_ENABLE_IF(is_fixed_point< T >()) >

T cudf::jit::column_device_view::element ( size_type element_index ) const

inlinenoexcept

Returns reference to element at the specified index.

If the element at the specified index is NULL, i.e., is_null(element_index) == true, then any attempt to use the result will lead to undefined behavior.

This function accounts for the offset.

This function does not participate in overload resolution if is_rep_layout_compatible<T> is false. Specializations of this function may exist for types T where is_rep_layout_compatible<T> is false.

Template Parameters

T	The element type

Parameters

element_index Position of the desired element

Returns: reference to the element at the specified index

Definition at line 207 of file types.cuh.

◆ num_child_columns()

CUDF_HOST_DEVICE size_type cudf::jit::column_device_view::num_child_columns ( ) const

inlinenoexcept

Returns the number of child columns.

Returns: The number of child columns

Definition at line 226 of file types.cuh.

Member Data Documentation

◆ _num_children

size_type cudf::jit::column_device_view::_num_children = 0

protected

The number of child columns.

Definition at line 240 of file types.cuh.

◆ d_children

column_device_view* cudf::jit::column_device_view::d_children = nullptr

protected

Array of column_device_view objects in device memory. Based on element type, children may contain additional data

Definition at line 235 of file types.cuh.

The documentation for this class was generated from the following file:

types.cuh

Public Member Functions

Protected Attributes

Detailed Description

Constructor & Destructor Documentation

◆ column_device_view()

Member Function Documentation

◆ child()

◆ element() [1/2]

◆ element() [2/2]

◆ num_child_columns()

Member Data Documentation

◆ _num_children

◆ d_children