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//
// Copyright © 2021 Arm Ltd and Contributors. All rights reserved.
// SPDX-License-Identifier: MIT
//
#include <armnn/Exceptions.hpp>
#include <armnn/utility/IgnoreUnused.hpp>
#include <armnn/backends/TensorHandle.hpp>
#include <cstring>
namespace armnn
{
TensorShape GetUnpaddedTensorStrides(const TensorInfo& tensorInfo)
{
TensorShape shape(tensorInfo.GetShape());
auto size = GetDataTypeSize(tensorInfo.GetDataType());
auto runningSize = size;
std::vector<unsigned int> strides(shape.GetNumDimensions());
auto lastIdx = shape.GetNumDimensions()-1;
for (unsigned int i=0; i < lastIdx ; i++)
{
strides[lastIdx-i] = runningSize;
runningSize *= shape[lastIdx-i];
}
strides[0] = runningSize;
return TensorShape(shape.GetNumDimensions(), strides.data());
}
ConstTensorHandle::ConstTensorHandle(const TensorInfo& tensorInfo)
: m_TensorInfo(tensorInfo)
, m_Memory(nullptr)
{
}
template <>
const void* ConstTensorHandle::GetConstTensor<void>() const
{
return m_Memory;
}
TensorHandle::TensorHandle(const TensorInfo& tensorInfo)
: ConstTensorHandle(tensorInfo)
, m_MutableMemory(nullptr)
{
}
template <>
void* TensorHandle::GetTensor<void>() const
{
return m_MutableMemory;
}
ScopedTensorHandle::ScopedTensorHandle(const TensorInfo& tensorInfo)
: TensorHandle(tensorInfo)
{
}
ScopedTensorHandle::ScopedTensorHandle(const ConstTensor& tensor)
: ScopedTensorHandle(tensor.GetInfo())
{
CopyFrom(tensor.GetMemoryArea(), tensor.GetNumBytes());
}
ScopedTensorHandle::ScopedTensorHandle(const ConstTensorHandle& tensorHandle)
: ScopedTensorHandle(tensorHandle.GetTensorInfo())
{
CopyFrom(tensorHandle.GetConstTensor<void>(), tensorHandle.GetTensorInfo().GetNumBytes());
}
ScopedTensorHandle::ScopedTensorHandle(const ScopedTensorHandle& other)
: TensorHandle(other.GetTensorInfo())
{
CopyFrom(other);
}
ScopedTensorHandle& ScopedTensorHandle::operator=(const ScopedTensorHandle& other)
{
::operator delete(GetTensor<void>());
SetMemory(nullptr);
CopyFrom(other);
return *this;
}
ScopedTensorHandle::~ScopedTensorHandle()
{
::operator delete(GetTensor<void>());
}
void ScopedTensorHandle::Allocate()
{
if (GetTensor<void>() == nullptr)
{
SetMemory(::operator new(GetTensorInfo().GetNumBytes()));
}
else
{
throw InvalidArgumentException("TensorHandle::Allocate Trying to allocate a TensorHandle"
"that already has allocated memory.");
}
}
void ScopedTensorHandle::CopyOutTo(void* memory) const
{
memcpy(memory, GetTensor<void>(), GetTensorInfo().GetNumBytes());
}
void ScopedTensorHandle::CopyInFrom(const void* memory)
{
memcpy(GetTensor<void>(), memory, GetTensorInfo().GetNumBytes());
}
void ScopedTensorHandle::CopyFrom(const ScopedTensorHandle& other)
{
CopyFrom(other.GetTensor<void>(), other.GetTensorInfo().GetNumBytes());
}
void ScopedTensorHandle::CopyFrom(const void* srcMemory, unsigned int numBytes)
{
ARMNN_ASSERT(GetTensor<void>() == nullptr);
ARMNN_ASSERT(GetTensorInfo().GetNumBytes() == numBytes);
if (srcMemory)
{
Allocate();
memcpy(GetTensor<void>(), srcMemory, numBytes);
}
}
void PassthroughTensorHandle::Allocate()
{
throw InvalidArgumentException("PassthroughTensorHandle::Allocate() should never be called");
}
void ConstPassthroughTensorHandle::Allocate()
{
throw InvalidArgumentException("ConstPassthroughTensorHandle::Allocate() should never be called");
}
} // namespace armnn
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