walberla::gpu::communication::CustomMemoryBuffer< Allocator > Class Template Reference

Detailed Description

template<typename Allocator>
class walberla::gpu::communication::CustomMemoryBuffer< Allocator >

Simple buffer class that supports memory allocators, e.g.

for pinned host memory or GPU memory

In contrast to core::mpi::Buffer this class does not support stream operators "<<" and ">>" because these operators imply serial (un)packing which is not feasible on the GPU. The allocator template has to provide:

• static void *allocate( size_t size )
• void deallocate( void *ptr )
• void memcpy( void *dst, void *src, size_t count )

The buffer has a beginning, a current position and an end position. Here is an overview of the most important operations:

• clear: reset current position to begin, does not change size
• advance: moves current position number of bytes forward and returns pointer to the old current position two versions are available, one that automatically resizes and reallocates the buffer, and one that fails if not enough space is available

#include <CustomMemoryBuffer.h>

Public Types
using	ElementType = uint8_t

Public Member Functions
	CustomMemoryBuffer ()
	CustomMemoryBuffer (std::size_t initSize)
	CustomMemoryBuffer (const CustomMemoryBuffer &pb)
	~CustomMemoryBuffer ()
CustomMemoryBuffer &	operator= (const CustomMemoryBuffer &pb)
void	resize (std::size_t newSize)
std::size_t	allocSize () const
std::size_t	size () const
std::size_t	remainingSize () const
ElementType *	ptr () const
ElementType *	cur () const
void	clear ()
ElementType *	advance (std::size_t bytes)
ElementType *	advanceNoResize (std::size_t bytes)
template<typename T >
T *	advance (std::size_t bytes)
template<typename T >
T *	advanceNoResize (std::size_t bytes)

Private Attributes
ElementType *	begin_ = nullptr
ElementType *	cur_ = nullptr
ElementType *	end_ = nullptr

Member Typedef Documentation

ElementType

template<typename Allocator >

using walberla::gpu::communication::CustomMemoryBuffer< Allocator >::ElementType = uint8_t

Constructor & Destructor Documentation

CustomMemoryBuffer() [1/3]

template<typename Allocator >

walberla::gpu::communication::CustomMemoryBuffer< Allocator >::CustomMemoryBuffer ( )

explicitdefault

CustomMemoryBuffer() [2/3]

template<typename Allocator >

walberla::gpu::communication::CustomMemoryBuffer< Allocator >::CustomMemoryBuffer ( std::size_t initSize )

explicit

CustomMemoryBuffer() [3/3]

template<typename Allocator >

walberla::gpu::communication::CustomMemoryBuffer< Allocator >::CustomMemoryBuffer ( const CustomMemoryBuffer< Allocator > & pb )

explicit

~CustomMemoryBuffer()

template<typename Allocator >

walberla::gpu::communication::CustomMemoryBuffer< Allocator >::~CustomMemoryBuffer

(

)

Member Function Documentation

advance() [1/2]

template<typename Allocator >

CustomMemoryBuffer< Allocator >::ElementType * walberla::gpu::communication::CustomMemoryBuffer< Allocator >::advance

(

std::size_t

bytes

)

advance() [2/2]

template<typename Allocator >

template<typename T >

T * walberla::gpu::communication::CustomMemoryBuffer< Allocator >::advance ( std::size_t bytes )

inline

advanceNoResize() [1/2]

template<typename Allocator >

CustomMemoryBuffer< Allocator >::ElementType * walberla::gpu::communication::CustomMemoryBuffer< Allocator >::advanceNoResize

(

std::size_t

bytes

)

advanceNoResize() [2/2]

template<typename Allocator >

template<typename T >

T * walberla::gpu::communication::CustomMemoryBuffer< Allocator >::advanceNoResize ( std::size_t bytes )

inline

allocSize()

template<typename Allocator >

std::size_t walberla::gpu::communication::CustomMemoryBuffer< Allocator >::allocSize ( ) const

inline

clear()

template<typename Allocator >

void walberla::gpu::communication::CustomMemoryBuffer< Allocator >::clear ( )

inline

cur()

template<typename Allocator >

ElementType * walberla::gpu::communication::CustomMemoryBuffer< Allocator >::cur ( ) const

inline

operator=()

template<typename Allocator >

CustomMemoryBuffer< Allocator > & walberla::gpu::communication::CustomMemoryBuffer< Allocator >::operator=

(

const CustomMemoryBuffer< Allocator > &

pb

)

ptr()

template<typename Allocator >

ElementType * walberla::gpu::communication::CustomMemoryBuffer< Allocator >::ptr ( ) const

inline

remainingSize()

template<typename Allocator >

std::size_t walberla::gpu::communication::CustomMemoryBuffer< Allocator >::remainingSize ( ) const

inline

resize()

template<typename Allocator >

void walberla::gpu::communication::CustomMemoryBuffer< Allocator >::resize

(

std::size_t

newSize

)

size()

template<typename Allocator >

std::size_t walberla::gpu::communication::CustomMemoryBuffer< Allocator >::size ( ) const

inline

Member Data Documentation

begin_

template<typename Allocator >

ElementType* walberla::gpu::communication::CustomMemoryBuffer< Allocator >::begin_ = nullptr

private

cur_

template<typename Allocator >

ElementType* walberla::gpu::communication::CustomMemoryBuffer< Allocator >::cur_ = nullptr

private

end_

template<typename Allocator >

ElementType* walberla::gpu::communication::CustomMemoryBuffer< Allocator >::end_ = nullptr

private

---

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

• /builds/administration/walberla-website/walberla/src/gpu/communication/CustomMemoryBuffer.h
• /builds/administration/walberla-website/walberla/src/gpu/communication/CustomMemoryBuffer.impl.h