IVGCVSW-3307 Introduce RefTensorHandle

Use it for intermediate tensors on reference backend.
Lays the groundwork for memory management in the reference backend.

Change-Id: I7d3ee132cac31bde70ae6e1b815f4f0b03d550a6
Signed-off-by: Matthew Bentham <Matthew.Bentham@arm.com>

1 files changed, 66 insertions, 0 deletions

diff --git a/src/backends/reference/RefTensorHandle.hpp b/src/backends/reference/RefTensorHandle.hpp
new file mode 100644
index 0000000000..66d840ab35
--- /dev/null
+++ b/src/backends/reference/RefTensorHandle.hpp
@@ -0,0 +1,66 @@
+//
+// Copyright © 2017 Arm Ltd. All rights reserved.
+// SPDX-License-Identifier: MIT
+//
+#pragma once
+
+#include <backendsCommon/CpuTensorHandle.hpp>
+
+namespace armnn
+{
+
+// An implementation of ITensorHandle with simple "bump the pointer" memory-management behaviour
+class RefTensorHandle : public ITensorHandle
+{
+public:
+    RefTensorHandle(const TensorInfo& tensorInfo);
+
+    ~RefTensorHandle();
+
+    virtual void Manage() override
+    {}
+
+    virtual ITensorHandle* GetParent() const override
+    {
+        return nullptr;
+    }
+
+    virtual const void* Map(bool /* blocking = true */) const override
+    {
+        return m_Memory;
+    }
+
+    virtual void Unmap() const override
+    {}
+
+    virtual void Allocate() override;
+
+    TensorShape GetStrides() const override
+    {
+        return GetUnpaddedTensorStrides(m_TensorInfo);
+    }
+
+    TensorShape GetShape() const override
+    {
+        return m_TensorInfo.GetShape();
+    }
+
+    const TensorInfo& GetTensorInfo() const
+    {
+        return m_TensorInfo;
+    }
+
+private:
+    // Only used for testing
+    void CopyOutTo(void*) const override;
+    void CopyInFrom(const void*) override;
+
+    RefTensorHandle(const RefTensorHandle& other) = delete;
+
+    RefTensorHandle& operator=(const RefTensorHandle& other) = delete;
+
+    TensorInfo m_TensorInfo;
+    void* m_Memory;
+};
+
+}
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