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CudaDeviceBuffer Class Reference

Simple memory buffer using un-managed pinned host memory when compiled with NVCC. Obviously this class is making explicit used of CUDA so replace it with your own memory allocator if you are not using CUDA. More...

`#include <nanovdb/util/CudaDeviceBuffer.h>`

## Public Member Functions

| CudaDeviceBuffer (uint64_t size=0)
| CudaDeviceBuffer (const CudaDeviceBuffer &)=delete
| Disallow copy-construction.
| CudaDeviceBuffer (CudaDeviceBuffer &&other) noexcept
| Move copy-constructor.
CudaDeviceBuffer & | operator= (const CudaDeviceBuffer &)=delete
| Disallow copy assignment operation.
CudaDeviceBuffer & | operator= (CudaDeviceBuffer &&other) noexcept
| Move copy assignment operation.
| ~CudaDeviceBuffer ()
| Destructor frees memory on both the host and device.
void | init (uint64_t size)
uint8_t * | data () const
uint8_t * | deviceData () const
void | deviceUpload (void *stream=0, bool sync=true) const
| Copy grid from the CPU/host to the GPU/device. If `sync` is false the memory copy is asynchronous!
void | deviceDownload (void *stream=0, bool sync=true) const
| Copy grid from the GPU/device to the CPU/host. If `sync` is false the memory copy is asynchronous!
uint64_t | size () const
| Returns the size in bytes of the raw memory buffer managed by this allocator.
bool | empty () const
| Returns true if this allocator is empty, i.e. has no allocated memory.
void | clear ()
| De-allocate all memory managed by this allocator and set all pointer to NULL.

## Static Public Member Functions

static CudaDeviceBuffer | create (uint64_t size, const CudaDeviceBuffer *context=nullptr)

## Detailed Description

Simple memory buffer using un-managed pinned host memory when compiled with NVCC. Obviously this class is making explicit used of CUDA so replace it with your own memory allocator if you are not using CUDA.

Note
  While CUDA's pinned host memory allows for asynchronous memory copy between host and device it is significantly slower then cached (un-pinned) memory on the host.

## Constructor & Destructor Documentation

## CudaDeviceBuffer() [1/3]

CudaDeviceBuffer | ( | uint64_t | size = 0 | ) |

inline

## CudaDeviceBuffer() [2/3]

CudaDeviceBuffer | ( | const CudaDeviceBuffer & |  | ) |

delete

Disallow copy-construction.

## CudaDeviceBuffer() [3/3]

CudaDeviceBuffer | ( | CudaDeviceBuffer && | other | ) |

inline noexcept

Move copy-constructor.

## ~CudaDeviceBuffer()

~CudaDeviceBuffer | ( |  | ) |

inline

Destructor frees memory on both the host and device.

## Member Function Documentation

## clear()

void clear | ( |  | ) |

inline

De-allocate all memory managed by this allocator and set all pointer to NULL.

## create()

CudaDeviceBuffer create | ( | uint64_t | size,
|  | const CudaDeviceBuffer * | context = nullptr )

inline static

## data()

uint8_t * data | ( |  | ) | const

inline

Warning
  Note that the pointer can be NULL is the allocator was not initialized!

## deviceData()

uint8_t * deviceData | ( |  | ) | const

inline

## deviceDownload()

void deviceDownload | ( | void * | stream = 0,
|  | bool | sync = true ) const

inline

Copy grid from the GPU/device to the CPU/host. If `sync` is false the memory copy is asynchronous!

## deviceUpload()

void deviceUpload | ( | void * | stream = 0,
|  | bool | sync = true ) const

inline

Copy grid from the CPU/host to the GPU/device. If `sync` is false the memory copy is asynchronous!

Note
  This will allocate memory on the GPU/device if it is not already allocated

## empty()

bool empty | ( |  | ) | const

inline

Returns true if this allocator is empty, i.e. has no allocated memory.

## init()

void init | ( | uint64_t | size | ) |

inline

## operator=() [1/2]

CudaDeviceBuffer & operator= | ( | const CudaDeviceBuffer & |  | ) |

delete

Disallow copy assignment operation.

## operator=() [2/2]

CudaDeviceBuffer & operator= | ( | CudaDeviceBuffer && | other | ) |

inline noexcept

Move copy assignment operation.

## size()

uint64_t size | ( |  | ) | const

inline

Returns the size in bytes of the raw memory buffer managed by this allocator.