cudf::timestamp_scalar< T > Class Template Reference

An owning class to represent a timestamp value in device memory. More...

#include <scalar.hpp>

Inheritance diagram for cudf::timestamp_scalar< T >:

Public Types
using	rep_type = typename T::rep
	The underlying representation type of the timestamp.
Public Types inherited from cudf::detail::fixed_width_scalar< T >
using	value_type = T
	Type of the value held by the scalar.

Public Member Functions
	timestamp_scalar (timestamp_scalar &&other)=default
	Move constructor for timestamp_scalar. More...
	timestamp_scalar (timestamp_scalar const &other, rmm::cuda_stream_view stream=cudf::get_default_stream(), rmm::mr::device_memory_resource *mr=rmm::mr::get_current_device_resource())
	Construct a new timestamp scalar object by deep copying another. More...
template<typename Duration2 >
	timestamp_scalar (Duration2 const &value, bool is_valid, rmm::cuda_stream_view stream=cudf::get_default_stream(), rmm::mr::device_memory_resource *mr=rmm::mr::get_current_device_resource())
	Construct a new timestamp scalar object from a duration that is convertible to T::duration. More...
rep_type	ticks_since_epoch (rmm::cuda_stream_view stream)
	Returns the duration in number of ticks since the UNIX epoch. More...
Public Member Functions inherited from cudf::chrono_scalar< T >
	chrono_scalar (chrono_scalar &&other)=default
	Move constructor for chrono_scalar. More...
chrono_scalar &	operator= (chrono_scalar const &other)=delete
chrono_scalar &	operator= (chrono_scalar &&other)=delete
	chrono_scalar (chrono_scalar const &other, rmm::cuda_stream_view stream=cudf::get_default_stream(), rmm::mr::device_memory_resource *mr=rmm::mr::get_current_device_resource())
	Construct a new chrono scalar object by deep copying another. More...
	chrono_scalar (T value, bool is_valid=true, rmm::cuda_stream_view stream=cudf::get_default_stream(), rmm::mr::device_memory_resource *mr=rmm::mr::get_current_device_resource())
	Construct a new chrono scalar object. More...
	chrono_scalar (rmm::device_scalar< T > &&data, bool is_valid=true, rmm::cuda_stream_view stream=cudf::get_default_stream(), rmm::mr::device_memory_resource *mr=rmm::mr::get_current_device_resource())
	Construct a new chrono scalar object from existing device memory. More...
Public Member Functions inherited from cudf::detail::fixed_width_scalar< T >
	fixed_width_scalar (fixed_width_scalar &&other)=default
	Move constructor for fixed_width_scalar. More...
fixed_width_scalar &	operator= (fixed_width_scalar const &other)=delete
fixed_width_scalar &	operator= (fixed_width_scalar &&other)=delete
	fixed_width_scalar (fixed_width_scalar const &other, rmm::cuda_stream_view stream=cudf::get_default_stream(), rmm::mr::device_memory_resource *mr=rmm::mr::get_current_device_resource())
	Construct a new fixed-width scalar object by deep copying another. More...
void	set_value (T value, rmm::cuda_stream_view stream=cudf::get_default_stream())
	Set the value of the scalar. More...
	operator value_type () const
	Explicit conversion operator to get the value of the scalar on the host.
T	value (rmm::cuda_stream_view stream=cudf::get_default_stream()) const
	Get the value of the scalar. More...
T *	data ()
	Returns a raw pointer to the value in device memory. More...
T const *	data () const
	Returns a const raw pointer to the value in device memory. More...
Public Member Functions inherited from cudf::scalar
scalar &	operator= (scalar const &other)=delete
scalar &	operator= (scalar &&other)=delete
data_type	type () const noexcept
	Returns the scalar's logical value type. More...
void	set_valid_async (bool is_valid, rmm::cuda_stream_view stream=cudf::get_default_stream())
	Updates the validity of the value. More...
bool	is_valid (rmm::cuda_stream_view stream=cudf::get_default_stream()) const
	Indicates whether the scalar contains a valid value. More...
bool *	validity_data ()
	Returns a raw pointer to the validity bool in device memory. More...
bool const *	validity_data () const
	Return a const raw pointer to the validity bool in device memory. More...

Additional Inherited Members
Protected Member Functions inherited from cudf::detail::fixed_width_scalar< T >
	fixed_width_scalar (T value, bool is_valid=true, rmm::cuda_stream_view stream=cudf::get_default_stream(), rmm::mr::device_memory_resource *mr=rmm::mr::get_current_device_resource())
	Construct a new fixed width scalar object. More...
	fixed_width_scalar (rmm::device_scalar< T > &&data, bool is_valid=true, rmm::cuda_stream_view stream=cudf::get_default_stream(), rmm::mr::device_memory_resource *mr=rmm::mr::get_current_device_resource())
	Construct a new fixed width scalar object from existing device memory. More...
Protected Member Functions inherited from cudf::scalar
	scalar (scalar &&other)=default
	Move constructor for scalar. More...
	scalar (scalar const &other, rmm::cuda_stream_view stream=cudf::get_default_stream(), rmm::mr::device_memory_resource *mr=rmm::mr::get_current_device_resource())
	Construct a new scalar object by deep copying another. More...
	scalar (data_type type, bool is_valid=false, rmm::cuda_stream_view stream=cudf::get_default_stream(), rmm::mr::device_memory_resource *mr=rmm::mr::get_current_device_resource())
	Construct a new scalar object. More...
Protected Attributes inherited from cudf::detail::fixed_width_scalar< T >
rmm::device_scalar< T >	_data
	device memory containing the value
Protected Attributes inherited from cudf::scalar
data_type	_type {type_id::EMPTY}
	Logical type of value in the scalar.
rmm::device_scalar< bool >	_is_valid
	Device bool signifying validity.

Detailed Description

template<typename T>
class cudf::timestamp_scalar< T >

An owning class to represent a timestamp value in device memory.

Template Parameters

T	the data type of the timestamp value.

See also

cudf/wrappers/timestamps.hpp for a list of allowed types.

Definition at line 624 of file scalar.hpp.

Constructor & Destructor Documentation

timestamp_scalar() [1/3]

template<typename T >

cudf::timestamp_scalar< T >::timestamp_scalar ( timestamp_scalar< T > &&  other )

default

Move constructor for timestamp_scalar.

Parameters

other

The other timestamp_scalar to move from.

timestamp_scalar() [2/3]

template<typename T >

cudf::timestamp_scalar< T >::timestamp_scalar	(	timestamp_scalar< T > const &	other,
		rmm::cuda_stream_view	stream = cudf::get_default_stream(),
		rmm::mr::device_memory_resource *	mr = rmm::mr::get_current_device_resource()
	)

Construct a new timestamp scalar object by deep copying another.

Parameters

other	The scalar to copy.
stream	CUDA stream used for device memory operations.
mr	Device memory resource to use for device memory allocation.

timestamp_scalar() [3/3]

template<typename T >

template<typename Duration2 >

cudf::timestamp_scalar< T >::timestamp_scalar	(	Duration2 const &	value,
		bool	is_valid,
		rmm::cuda_stream_view	stream = cudf::get_default_stream(),
		rmm::mr::device_memory_resource *	mr = rmm::mr::get_current_device_resource()
	)

Construct a new timestamp scalar object from a duration that is convertible to T::duration.

Parameters

value	Duration representing number of ticks since the UNIX epoch or another duration that is convertible to timestamps duration.
is_valid	Whether the value held by the scalar is valid.
stream	CUDA stream used for device memory operations.
mr	Device memory resource to use for device memory allocation.

Member Function Documentation

ticks_since_epoch()

template<typename T >

rep_type cudf::timestamp_scalar< T >::ticks_since_epoch

(

rmm::cuda_stream_view

stream

)

Returns the duration in number of ticks since the UNIX epoch.

Parameters

stream

CUDA stream used for device memory operations.

Returns

The duration in number of ticks since the UNIX epoch

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

• scalar.hpp