RefTensorHandle Class Reference

#include <RefTensorHandle.hpp>

Inheritance diagram for RefTensorHandle:

Public Member Functions
	RefTensorHandle (const TensorInfo &tensorInfo, std::shared_ptr< RefMemoryManager > &memoryManager)
	RefTensorHandle (const TensorInfo &tensorInfo)
	~RefTensorHandle ()
virtual void	Manage () override
	Indicate to the memory manager that this resource is active. More...
virtual void	Allocate () override
	Indicate to the memory manager that this resource is no longer active. More...
virtual ITensorHandle *	GetParent () const override
	Get the parent tensor if this is a subtensor. More...
virtual const void *	Map (bool) const override
	Map the tensor data for access. More...
virtual void	Unmap () const override
	Unmap the tensor data. More...
TensorShape	GetStrides () const override
	Get the strides for each dimension ordered from largest to smallest where the smallest value is the same as the size of a single element in the tensor. More...
TensorShape	GetShape () const override
	Get the number of elements for each dimension ordered from slowest iterating dimension to fastest iterating dimension. More...
const TensorInfo &	GetTensorInfo () const
virtual MemorySourceFlags	GetImportFlags () const override
	Get flags describing supported import sources. More...
virtual bool	Import (void *memory, MemorySource source) override
	Import externally allocated memory. More...
virtual bool	CanBeImported (void *memory, MemorySource source) override
	Implementations must determine if this memory block can be imported. More...
virtual const void *	Map (bool blocking=true) const=0
	Map the tensor data for access. More...
void *	Map (bool blocking=true)
	Map the tensor data for access. More...
Public Member Functions inherited from ITensorHandle
virtual	~ITensorHandle ()
void *	Map (bool blocking=true)
	Map the tensor data for access. More...
void	Unmap ()
	Unmap the tensor data that was previously mapped with call to Map(). More...
virtual void	Unimport ()
	Unimport externally allocated memory. More...

Detailed Description

Definition at line 15 of file RefTensorHandle.hpp.

Constructor & Destructor Documentation

RefTensorHandle() [1/2]

RefTensorHandle	(	const TensorInfo &	tensorInfo,
		std::shared_ptr< RefMemoryManager > &	memoryManager
	)

Definition at line 10 of file RefTensorHandle.cpp.

                                                                                                            :
    m_TensorInfo(tensorInfo),
    m_MemoryManager(memoryManager),
    m_Pool(nullptr),
    m_UnmanagedMemory(nullptr),
    m_ImportedMemory(nullptr)
{
 
}

RefTensorHandle() [2/2]

RefTensorHandle

(

const TensorInfo &

tensorInfo

)

Definition at line 20 of file RefTensorHandle.cpp.

                                 : m_TensorInfo(tensorInfo),
                                   m_Pool(nullptr),
                                   m_UnmanagedMemory(nullptr),
                                   m_ImportedMemory(nullptr)
{
 
}

~RefTensorHandle()

~RefTensorHandle

(

)

Definition at line 29 of file RefTensorHandle.cpp.

{
    ::operator delete(m_UnmanagedMemory);
}

Member Function Documentation

Allocate()

void Allocate ( )

overridevirtual

Indicate to the memory manager that this resource is no longer active.

This is used to compute overlapping lifetimes of resources.

Implements ITensorHandle.

Definition at line 45 of file RefTensorHandle.cpp.

{
    if (!m_UnmanagedMemory)
    {
        if (!m_Pool)
        {
            // unmanaged
            m_UnmanagedMemory = ::operator new(m_TensorInfo.GetNumBytes());
        }
        else
        {
            m_MemoryManager->Allocate(m_Pool);
        }
    }
    else
    {
        throw InvalidArgumentException("RefTensorHandle::Allocate Trying to allocate a RefTensorHandle"
                                       "that already has allocated memory.");
    }
}

References TensorInfo::GetNumBytes().

CanBeImported()

bool CanBeImported ( void *  memory, MemorySource  source  )

overridevirtual

Implementations must determine if this memory block can be imported.

This might be based on alignment or memory source type.

Returns

true if this memory can be imported.

false by default, cannot be imported.

Reimplemented from ITensorHandle.

Definition at line 128 of file RefTensorHandle.cpp.

{
    if (source == MemorySource::Malloc)
    {
        uintptr_t alignment = GetDataTypeSize(m_TensorInfo.GetDataType());
        if (reinterpret_cast<uintptr_t>(memory) % alignment)
        {
            return false;
        }
        return true;
    }
    return false;
}

References TensorInfo::GetDataType(), armnn::GetDataTypeSize(), and armnn::Malloc.

Referenced by RefTensorHandle::Import().

GetImportFlags()

MemorySourceFlags GetImportFlags ( ) const

overridevirtual

Get flags describing supported import sources.

Reimplemented from ITensorHandle.

Definition at line 105 of file RefTensorHandle.cpp.

{
    return static_cast<MemorySourceFlags>(MemorySource::Malloc);
}

References armnn::Malloc.

GetParent()

virtual ITensorHandle* GetParent ( ) const

inlineoverridevirtual

Get the parent tensor if this is a subtensor.

Returns

a pointer to the parent tensor. Otherwise nullptr if not a subtensor.

Implements ITensorHandle.

Definition at line 28 of file RefTensorHandle.hpp.

    {
        return nullptr;
    }

GetShape()

TensorShape GetShape ( ) const

inlineoverridevirtual

Get the number of elements for each dimension ordered from slowest iterating dimension to fastest iterating dimension.

Returns

a TensorShape filled with the number of elements for each dimension.

Implements ITensorHandle.

Definition at line 44 of file RefTensorHandle.hpp.

    {
        return m_TensorInfo.GetShape();
    }

References TensorInfo::GetShape().

GetStrides()

TensorShape GetStrides ( ) const

inlineoverridevirtual

Get the strides for each dimension ordered from largest to smallest where the smallest value is the same as the size of a single element in the tensor.

Returns

a TensorShape filled with the strides for each dimension

Implements ITensorHandle.

Definition at line 39 of file RefTensorHandle.hpp.

    {
        return GetUnpaddedTensorStrides(m_TensorInfo);
    }

References armnn::GetUnpaddedTensorStrides().

GetTensorInfo()

const TensorInfo& GetTensorInfo ( ) const

inline

Definition at line 49 of file RefTensorHandle.hpp.

    {
        return m_TensorInfo;
    }

Import()

bool Import ( void *  memory, MemorySource  source  )

overridevirtual

Import externally allocated memory.

Parameters

memory	base address of the memory being imported.
source	source of the allocation for the memory being imported.

Returns

true on success or false on failure

Reimplemented from ITensorHandle.

Definition at line 110 of file RefTensorHandle.cpp.

{
    if (source == MemorySource::Malloc)
    {
        // Check memory alignment
        if(!CanBeImported(memory, source))
        {
            m_ImportedMemory = nullptr;
            return false;
        }
 
        m_ImportedMemory = memory;
        return true;
    }
 
    return false;
}

References RefTensorHandle::CanBeImported(), and armnn::Malloc.

Manage()

void Manage ( )

overridevirtual

Indicate to the memory manager that this resource is active.

This is used to compute overlapping lifetimes of resources.

Implements ITensorHandle.

Definition at line 34 of file RefTensorHandle.cpp.

{
    ARMNN_ASSERT_MSG(!m_Pool, "RefTensorHandle::Manage() called twice");
    ARMNN_ASSERT_MSG(!m_UnmanagedMemory, "RefTensorHandle::Manage() called after Allocate()");
 
    if (m_MemoryManager)
    {
        m_Pool = m_MemoryManager->Manage(m_TensorInfo.GetNumBytes());
    }
}

References ARMNN_ASSERT_MSG, and TensorInfo::GetNumBytes().

Map() [1/3]

void* Map

inline

Map the tensor data for access.

Must be paired with call to Unmap().

Parameters

blocking

hint to block the calling thread until all other accesses are complete. (backend dependent)

Returns

pointer to the first element of the mapped data.

Definition at line 43 of file ITensorHandle.hpp.

    {
        return const_cast<void*>(static_cast<const ITensorHandle*>(this)->Map(blocking));
    }

Map() [2/3]

virtual const void* Map

Map the tensor data for access.

Parameters

blocking

hint to block the calling thread until all other accesses are complete. (backend dependent)

Returns

pointer to the first element of the mapped data.

Map() [3/3]

const void * Map ( bool  blocking ) const

overridevirtual

Map the tensor data for access.

Parameters

blocking

hint to block the calling thread until all other accesses are complete. (backend dependent)

Returns

pointer to the first element of the mapped data.

Implements ITensorHandle.

Definition at line 66 of file RefTensorHandle.cpp.

{
    return GetPointer();
}

Unmap()

virtual void Unmap ( ) const

inlineoverridevirtual

Unmap the tensor data.

Implements ITensorHandle.

Definition at line 36 of file RefTensorHandle.hpp.

    {}

---

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

• src/backends/reference/RefTensorHandle.hpp
• src/backends/reference/RefTensorHandle.cpp