plssvm::cuda::detail::device_ptr< T > Class Template Reference

Small wrapper class around a CUDA device pointer together with commonly used device functions. More...

Inheritance diagram for plssvm::cuda::detail::device_ptr< T >:

Collaboration diagram for plssvm::cuda::detail::device_ptr< T >:

Public Types
using	value_type = T
	The type of the values used in the device_ptr.
using	host_pointer_type = value_type *
	The type of the host pointer corresponding to the wrapped device pointer.
using	const_host_pointer_type = const value_type *
	The const type of the host pointer corresponding to the wrapped device pointer.
using	size_type = std::size_t
	The used size type.
using	queue_type = int
	The type of the device queue used to manipulate the managed device memory.
using	device_pointer_type = T *
	The type of the device pointer.

Public Member Functions
	device_ptr ()=default
	Default construct a CUDA device_ptr with a size of 0. More...
	device_ptr (size_type size, queue_type device=0)
	Allocates size * sizeof(T) bytes on the device with ID device. More...
	device_ptr (const device_ptr &)=delete
	Delete copy-constructor to make device_ptr a move only type. More...
	device_ptr (device_ptr &&other) noexcept=default
	Move-constructor as device_ptr is a move-only type. More...
device_ptr &	operator= (const device_ptr &)=delete
	Delete copy-assignment-operator to make device_ptr a move only type. More...
device_ptr &	operator= (device_ptr &&other) noexcept=default
	Move-assignment-operator as device_ptr is a move-only type. More...
	~device_ptr () override
	Free the memory managed by the device_ptr. More...
void	memset (int pattern, size_type pos, size_type num_bytes) override
	Memset up-to num_bytes values to pattern starting at position pos. More...
void	fill (value_type value, size_type pos, size_type count) override
	Fill up-to count values to value starting at position pos. More...
void	copy_to_device (const_host_pointer_type data_to_copy, size_type pos, size_type count) override
	Copy up-to count many values from data_to_copy to the device starting at device pointer position pos. More...
void	copy_to_host (host_pointer_type buffer, size_type pos, size_type count) const override
	Copy up-to count many values from the device starting at device pointer position pos to the host buffer buffer. More...
void	swap (gpu_device_ptr &other) noexcept
	Swap the contents of *this with the contents of other. More...
	operator bool () const noexcept
	Checks whether *this currently wraps a device pointer. More...
device_pointer_type	get () noexcept
	Access the underlying device pointer. More...
device_pointer_type	get () const noexcept
	Access the underlying device pointer. More...
size_type	size () const noexcept
	Get the number of elements in the wrapped device_ptr. More...
bool	empty () const noexcept
	Check whether the device_ptr currently maps zero elements. More...
queue_type	queue () const noexcept
	Return the queue managing the memory of the wrapped device pointer. More...
void	memset (int pattern, size_type pos=0)
	Memset all bytes using the pattern starting at position pos. More...
void	fill (value_type value, size_type pos=0)
	Fill all values with the value starting at position pos. More...
void	copy_to_device (const std::vector< value_type > &data_to_copy)
	Copy device_ptr::size() many values from data_to_copy to the device. More...
void	copy_to_device (const std::vector< value_type > &data_to_copy, size_type pos, size_type count)
	Copy up-to count many values from data_to_copy to the device starting at device pointer position pos. More...
void	copy_to_device (const_host_pointer_type data_to_copy)
	Copy device_ptr::size() many values from data_to_copy to the device. More...
void	copy_to_host (std::vector< value_type > &buffer) const
	Copy device_ptr::size() many values from the device to the host buffer buffer. More...
void	copy_to_host (std::vector< value_type > &buffer, size_type pos, size_type count) const
	Copy up-to count many values from the device starting at device pointer position pos to the host buffer buffer. More...
void	copy_to_host (host_pointer_type buffer) const
	Copy device_ptr::size() many values from the device to the host buffer buffer. More...

Protected Attributes
queue_type	queue_
	The device queue used to manage the device memory associated with this device pointer.
device_pointer_type	data_
	The device pointer pointing to the managed memory.
size_type	size_
	The size of the managed memory.

Private Types
using	base_type = ::plssvm::detail::gpu_device_ptr< T, int >
	The template base type of the CUDA device_ptr class.

Detailed Description

template<typename T>
class plssvm::cuda::detail::device_ptr< T >

Small wrapper class around a CUDA device pointer together with commonly used device functions.

Template Parameters

T	the type of the kernel pointer to wrap

Constructor & Destructor Documentation

device_ptr() [1/4]

template<typename T >

plssvm::cuda::detail::device_ptr< T >::device_ptr ( )

default

Default construct a CUDA device_ptr with a size of 0.

Always associated with device 0.

device_ptr() [2/4]

template<typename T >

plssvm::cuda::detail::device_ptr< T >::device_ptr ( size_type  size, queue_type  device = 0  )

explicit

Allocates size * sizeof(T) bytes on the device with ID device.

Parameters

[in]	size	the number of elements represented by the device_ptr
[in]	device	the associated CUDA device

Exceptions

plssvm::cuda::backend_exception

if the given device ID is smaller than 0 or greater or equal than the available number of devices

device_ptr() [3/4]

template<typename T >

plssvm::cuda::detail::device_ptr< T >::device_ptr ( const device_ptr< T > &  )

delete

Delete copy-constructor to make device_ptr a move only type.

device_ptr() [4/4]

template<typename T >

plssvm::cuda::detail::device_ptr< T >::device_ptr ( device_ptr< T > &&  other )

defaultnoexcept

Move-constructor as device_ptr is a move-only type.

Parameters

[in,out]

other

the device_ptr to move-construct from

~device_ptr()

template<typename T >

plssvm::cuda::detail::device_ptr< T >::~device_ptr ( )

override

Free the memory managed by the device_ptr.

Member Function Documentation

operator=() [1/2]

template<typename T >

device_ptr& plssvm::cuda::detail::device_ptr< T >::operator= ( const device_ptr< T > &  )

delete

Delete copy-assignment-operator to make device_ptr a move only type.

operator=() [2/2]

template<typename T >

device_ptr& plssvm::cuda::detail::device_ptr< T >::operator= ( device_ptr< T > &&  other )

defaultnoexcept

Move-assignment-operator as device_ptr is a move-only type.

Parameters

[in,out]

other

the device_ptr to move-assign from

Returns

*this

memset() [1/2]

template<typename T >

void plssvm::cuda::detail::device_ptr< T >::memset ( int  pattern, size_type  pos, size_type  num_bytes  )

overridevirtual

Memset up-to num_bytes values to pattern starting at position pos.

Memset [pos, rnum_bytes) where num_bytes is the smaller value of num_bytes and (device_ptr::size() - pos) * sizeof(value_type).

Parameters

[in]	pattern	the memset value
[in]	pos	the position to start the memset
[in]	num_bytes	the number of bytes to set

Exceptions

plssvm::gpu_device_ptr_exception

if pos is greater or equal than device_ptr::size()

Implements plssvm::detail::gpu_device_ptr< T, int >.

fill() [1/2]

template<typename T >

void plssvm::cuda::detail::device_ptr< T >::fill ( value_type  value, size_type  pos, size_type  count  )

overridevirtual

Fill up-to count values to value starting at position pos.

Fill [pos, rcount) where rcount is the smaller value of count and device_ptr::size() - pos.

Parameters

[in]	value	the fill value
[in]	pos	the position to start the fill
[in]	count	the number of values to set

Exceptions

plssvm::gpu_device_ptr_exception

if pos is greater or equal than device_ptr::size()

Implements plssvm::detail::gpu_device_ptr< T, int >.

copy_to_device() [1/4]

template<typename T >

void plssvm::cuda::detail::device_ptr< T >::copy_to_device ( const_host_pointer_type  data_to_copy, size_type  pos, size_type  count  )

overridevirtual

Copy up-to count many values from data_to_copy to the device starting at device pointer position pos.

Copies [pos, rcount) values where rcount is the smaller value of count and device_ptr::size() - pos.

Parameters

[in]	data_to_copy	the data to copy onto the device
[in]	pos	the starting position for the copying in the device pointer
[in]	count	the number of elements to copy

Implements plssvm::detail::gpu_device_ptr< T, int >.

copy_to_host() [1/4]

template<typename T >

void plssvm::cuda::detail::device_ptr< T >::copy_to_host ( host_pointer_type  buffer, size_type  pos, size_type  count  ) const

overridevirtual

Copy up-to count many values from the device starting at device pointer position pos to the host buffer buffer.

Copies [pos, rcount) values where rcount is the smaller value of count and device_ptr::size() - pos.

Parameters

[out]	buffer	the buffer to copy the data to
[in]	pos	the starting position for the copying in the device pointer
[in]	count	the number of elements to copy

Implements plssvm::detail::gpu_device_ptr< T, int >.

swap()

void plssvm::detail::gpu_device_ptr< T, int , T * >::swap ( gpu_device_ptr< T, int > &  other )

noexceptinherited

Swap the contents of *this with the contents of other.

Parameters

[in,out]

other

the other device_ptr

operator bool()

plssvm::detail::gpu_device_ptr< T, int , T * >::operator bool ( ) const

inlineexplicitnoexceptinherited

Checks whether *this currently wraps a device pointer.

Same as device_ptr::get() != nullptr.

Returns

true if *this wraps a device pointer, false otherwise ([[nodiscard]])

get() [1/2]

device_pointer_type plssvm::detail::gpu_device_ptr< T, int , T * >::get ( )

inlinenoexceptinherited

Access the underlying device pointer.

Returns

the device pointer ([[nodiscard]])

get() [2/2]

device_pointer_type plssvm::detail::gpu_device_ptr< T, int , T * >::get ( ) const

inlinenoexceptinherited

Access the underlying device pointer.

Returns

the device pointer ([[nodiscard]])

size()

size_type plssvm::detail::gpu_device_ptr< T, int , T * >::size ( ) const

inlinenoexceptinherited

Get the number of elements in the wrapped device_ptr.

Returns

the number of elements ([[nodiscard]])

empty()

bool plssvm::detail::gpu_device_ptr< T, int , T * >::empty ( ) const

inlinenoexceptinherited

Check whether the device_ptr currently maps zero elements.

Same as device_ptr::size() == 0.

Returns

true if no elements are wrapped, false otherwise ([[nodiscard]])

queue()

queue_type plssvm::detail::gpu_device_ptr< T, int , T * >::queue ( ) const

inlinenoexceptinherited

Return the queue managing the memory of the wrapped device pointer.

Returns

the device queue ([[nodiscard]])

memset() [2/2]

void plssvm::detail::gpu_device_ptr< T, int , T * >::memset ( int  pattern, size_type  pos = 0  )

inherited

Memset all bytes using the pattern starting at position pos.

Parameters

[in]	pattern	the memset pattern
[in]	pos	the position to start the memset operation

Exceptions

plssvm::gpu_device_ptr_exception

if pos is greater or equal than device_ptr::size()

fill() [2/2]

void plssvm::detail::gpu_device_ptr< T, int , T * >::fill ( value_type  value, size_type  pos = 0  )

inherited

Fill all values with the value starting at position pos.

Parameters

[in]	value	the fill value
[in]	pos	the position to start the fill

Exceptions

plssvm::gpu_device_ptr_exception

if pos is greater or equal than device_ptr::size()

copy_to_device() [2/4]

void plssvm::detail::gpu_device_ptr< T, int , T * >::copy_to_device ( const std::vector< value_type > &  data_to_copy )

inherited

Copy device_ptr::size() many values from data_to_copy to the device.

Parameters

[in]

data_to_copy

the data to copy onto the device

Exceptions

plssvm::gpu_device_ptr_exception

if data_to_copy is too small to satisfy the copy

copy_to_device() [3/4]

void plssvm::detail::gpu_device_ptr< T, int , T * >::copy_to_device ( const std::vector< value_type > &  data_to_copy, size_type  pos, size_type  count  )

inherited

Copy up-to count many values from data_to_copy to the device starting at device pointer position pos.

Copies [pos, rcount) values where rcount is the smaller value of count and device_ptr::size() - pos.

Parameters

[in]	data_to_copy	the data to copy onto the device
[in]	pos	the starting position for the copying in the device pointer
[in]	count	the number of elements to copy

Exceptions

plssvm::gpu_device_ptr_exception

if data_to_copy is too small to satisfy the copy

copy_to_device() [4/4]

void plssvm::detail::gpu_device_ptr< T, int , T * >::copy_to_device ( const_host_pointer_type  data_to_copy )

inherited

Copy device_ptr::size() many values from data_to_copy to the device.

Parameters

[in]

data_to_copy

the data to copy onto the device

copy_to_host() [2/4]

void plssvm::detail::gpu_device_ptr< T, int , T * >::copy_to_host ( std::vector< value_type > &  buffer ) const

inherited

Copy device_ptr::size() many values from the device to the host buffer buffer.

Parameters

[out]

buffer

the buffer to copy the data to

Exceptions

plssvm::gpu_device_ptr_exception

if buffer is too small to satisfy the copy

copy_to_host() [3/4]

void plssvm::detail::gpu_device_ptr< T, int , T * >::copy_to_host ( std::vector< value_type > &  buffer, size_type  pos, size_type  count  ) const

inherited

Copy up-to count many values from the device starting at device pointer position pos to the host buffer buffer.

Copies [pos, rcount) values where rcount is the smaller value of count and device_ptr::size() - pos.

Parameters

[out]	buffer	the buffer to copy the data to
[in]	pos	the starting position for the copying in the device pointer
[in]	count	the number of elements to copy

Exceptions

plssvm::gpu_device_ptr_exception

if data_to_copy is too small to satisfy the copy

copy_to_host() [4/4]

void plssvm::detail::gpu_device_ptr< T, int , T * >::copy_to_host ( host_pointer_type  buffer ) const

inherited

Copy device_ptr::size() many values from the device to the host buffer buffer.

Parameters

[out]

buffer

the buffer to copy the data to

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

• include/plssvm/backends/CUDA/detail/device_ptr.cuh