open3d::core::Blob Class Reference

#include <Blob.h>

Public Member Functions
	Blob (int64_t byte_size, const Device &device)
	Blob (const Device &device, void *data_ptr, const std::function< void(void *)> &deleter)
	~Blob ()
Device	GetDevice () const
void *	GetDataPtr ()
const void *	GetDataPtr () const

Protected Attributes
std::function< void(void *)>	deleter_ = nullptr
	For externally managed memory, deleter != nullptr. More...
void *	data_ptr_ = nullptr
	Device data pointer. More...
Device	device_
	Device context for the blob. More...

Detailed Description

Blob class refers to a blob of memory in device or host.

Usually a Blob is constructed by specifying the blob size and device, memory allocation happens during the Blob's construction.

A Blob's buffer can also be managed by an external memory manager. In this case, a deleter function is needed to notify the external memory manager that the memory is no longer needed. It does not make sense to infer the total buffer size. For example, if a Tensor has a negative stride size, it is necessary to access memory addresses smaller than Blob's beginning memory address. The only responsibility for Blob is to hold the beginning memory address and it's up to the user to access any addresses around it.

In summary:

• A Blob does not know about its memory size after construction.
• A Blob cannot be deep-copied. However, the Tensor which owns the blob can be copied.

Constructor & Destructor Documentation

Blob() [1/2]

open3d::core::Blob::Blob ( int64_t  byte_size, const Device &  device  )

inline

Construct Blob on a specified device.

Parameters

byte_size	Size of the blob in bytes.
device	Device where the blob resides.

Blob() [2/2]

open3d::core::Blob::Blob ( const Device &  device, void *  data_ptr, const std::function< void(void *)> &  deleter  )

inline

Construct Blob with externally managed memory.

Parameters

device	Device where the blob resides.
data_ptr	Pointer the blob's beginning.
deleter	The deleter function is called at Blob's destruction to notify the external memory manager that the memory is no longer needed. It's up to the external manager to free the memory.

~Blob()

open3d::core::Blob::~Blob ( )

inline

Member Function Documentation

GetDataPtr() [1/2]

void* open3d::core::Blob::GetDataPtr ( )

inline

GetDataPtr() [2/2]

const void* open3d::core::Blob::GetDataPtr ( ) const

inline

GetDevice()

Device open3d::core::Blob::GetDevice ( ) const

inline

Field Documentation

data_ptr_

void* open3d::core::Blob::data_ptr_ = nullptr

protected

Device data pointer.

deleter_

std::function<void(void*)> open3d::core::Blob::deleter_ = nullptr

protected

For externally managed memory, deleter != nullptr.

device_

Device open3d::core::Blob::device_

protected

Device context for the blob.

---

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

• /home/runner/work/Open3D/Open3D/cpp/open3d/core/Blob.h (9238339 (Tue Mar 14 18:49:09 2023 -0700))