gko::segmented_array< T > Struct Template Reference

A minimal interface for a segmented array. More...

#include <ginkgo/core/base/segmented_array.hpp>

Inheritance diagram for gko::segmented_array< T >:

Public Member Functions
	segmented_array (std::shared_ptr< const Executor > exec)
	segmented_array (std::shared_ptr< const Executor > exec, const segmented_array &other)
	segmented_array (std::shared_ptr< const Executor > exec, segmented_array &&other)
	segmented_array (const segmented_array &other)
	segmented_array (segmented_array &&other) noexcept(false)
segmented_array &	operator= (const segmented_array &other)
segmented_array &	operator= (segmented_array &&) noexcept(false)
size_type	get_size () const
size_type	get_segment_count () const
T *	get_flat_data ()
const T *	get_const_flat_data () const
const gko::array< int64 > &	get_offsets () const
std::shared_ptr< const Executor >	get_executor () const

Static Public Member Functions
static segmented_array	create_from_sizes (const gko::array< int64 > &sizes)
static segmented_array	create_from_sizes (gko::array< T > buffer, const gko::array< int64 > &sizes)
static segmented_array	create_from_offsets (gko::array< int64 > offsets)
static segmented_array	create_from_offsets (gko::array< T > buffer, gko::array< int64 > offsets)

Detailed Description

template<typename T>
struct gko::segmented_array< T >

A minimal interface for a segmented array.

The segmented array is stored as a flat buffer with an offsets array. The segment i contains the index range [offset[i], offset[i + 1]) of the flat buffer.

Template Parameters

T	value type stored in the arrays

Constructor & Destructor Documentation

segmented_array() [1/3]

template<typename T >

gko::segmented_array< T >::segmented_array ( std::shared_ptr< const Executor >  exec )

explicit

Create an empty segmented array

Parameters

exec	executor for storage arrays

segmented_array() [2/3]

template<typename T >

gko::segmented_array< T >::segmented_array	(	std::shared_ptr< const Executor >	exec,
		const segmented_array< T > &	other
	)

Copies a segmented array to a different executor.

Parameters

exec	the executor to copy to
other	the segmented array to copy from

segmented_array() [3/3]

template<typename T >

gko::segmented_array< T >::segmented_array	(	std::shared_ptr< const Executor >	exec,
		segmented_array< T > &&	other
	)

Moves a segmented array to a different executor.

Parameters

exec	the executor to move to
other	the segmented array to move from

Member Function Documentation

create_from_offsets() [1/2]

template<typename T >

static segmented_array gko::segmented_array< T >::create_from_offsets ( gko::array< int64 >  offsets )

static

Creates an uninitialized segmented array from offsets.

Parameters

offsets

the index offsets for each segment, and the total size of the buffer as last element

create_from_offsets() [2/2]

template<typename T >

static segmented_array gko::segmented_array< T >::create_from_offsets ( gko::array< T >  buffer, gko::array< int64 >  offsets  )

static

Creates a segmented array from a flat buffer and offsets.

Parameters

buffer	the flat buffer whose size has to match the last element of offsets
offsets	the index offsets for each segment, and the total size of the buffer as last element

create_from_sizes() [1/2]

template<typename T >

static segmented_array gko::segmented_array< T >::create_from_sizes ( const gko::array< int64 > &  sizes )

static

Creates an uninitialized segmented array with predefined segment sizes.

Parameters

exec	executor for storage arrays
sizes	the sizes of each segment

create_from_sizes() [2/2]

template<typename T >

static segmented_array gko::segmented_array< T >::create_from_sizes ( gko::array< T >  buffer, const gko::array< int64 > &  sizes  )

static

Creates a segmented array from a flat buffer and segment sizes.

Parameters

buffer	the flat buffer whose size has to match the sum of sizes
sizes	the sizes of each segment

get_const_flat_data()

template<typename T >

const T * gko::segmented_array< T >::get_const_flat_data

(

)

const

Const-access to the flat buffer

Returns

the flat buffer

Referenced by gko::segmented_array< T >::get_executor().

get_executor()

template<typename T >

std::shared_ptr< const Executor > gko::segmented_array< T >::get_executor

(

)

const

Access the executor.

Returns

the executor

References gko::segmented_array< T >::get_const_flat_data(), gko::segmented_array< T >::get_flat_data(), gko::segmented_array< T >::get_offsets(), gko::segmented_array< T >::get_size(), and gko::make_array_view().

get_flat_data()

template<typename T >

T * gko::segmented_array< T >::get_flat_data

(

)

Access to the flat buffer.

Returns

the flat buffer

Referenced by gko::segmented_array< T >::get_executor().

get_offsets()

template<typename T >

const gko::array< int64 > & gko::segmented_array< T >::get_offsets

(

)

const

Access to the segment offsets.

Returns

the segment offsets

Referenced by gko::segmented_array< T >::get_executor().

get_segment_count()

template<typename T >

size_type gko::segmented_array< T >::get_segment_count

(

)

const

Get the number of segments.

Returns

the number of segments

get_size()

template<typename T >

size_type gko::segmented_array< T >::get_size

(

)

const

Get the total size of the stored buffer.

Returns

the total size of the stored buffer.

Referenced by gko::segmented_array< T >::get_executor().

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

• ginkgo/core/base/segmented_array.hpp