From 10b4dfd8e9ccd7a03df7bb053ee1c644cb37f8ab Mon Sep 17 00:00:00 2001
From: David Beck <david.beck@arm.com>
Date: Wed, 19 Sep 2018 12:03:20 +0100
Subject: IVGCVSW-1897 : build infrastructure for the src/backends folder

Change-Id: I7ebafb675ccc77ad54d1deb01412a8379a5356bb
---
 src/backends/ITensorHandle.hpp | 73 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 73 insertions(+)
 create mode 100644 src/backends/ITensorHandle.hpp

(limited to 'src/backends/ITensorHandle.hpp')

diff --git a/src/backends/ITensorHandle.hpp b/src/backends/ITensorHandle.hpp
new file mode 100644
index 0000000000..02f4ed6e5a
--- /dev/null
+++ b/src/backends/ITensorHandle.hpp
@@ -0,0 +1,73 @@
+//
+// Copyright © 2017 Arm Ltd. All rights reserved.
+// SPDX-License-Identifier: MIT
+//
+#pragma once
+
+namespace armnn
+{
+
+class TensorShape;
+
+class ITensorHandle
+{
+public:
+    enum Type
+    {
+        Cpu,
+        CL,
+        Neon
+    };
+
+    virtual ~ITensorHandle(){}
+
+    /// Indicate to the memory manager that this resource is active.
+    /// This is used to compute overlapping lifetimes of resources.
+    virtual void Manage() = 0;
+
+    /// Indicate to the memory manager that this resource is no longer active.
+    /// This is used to compute overlapping lifetimes of resources.
+    virtual void Allocate() = 0;
+
+    /// Get the type backend associated with the tensor handle.
+    /// \return Type enum
+    virtual ITensorHandle::Type GetType() const = 0;
+
+    /// Get the parent tensor if this is a subtensor.
+    /// \return a pointer to the parent tensor. Otherwise nullptr if not a subtensor.
+    virtual ITensorHandle* GetParent() const = 0;
+
+    /// Map the tensor data for access.
+    /// \param blocking hint to block the calling thread until all other accesses are complete. (backend dependent)
+    /// \return pointer to the first element of the mapped data.
+    virtual const void* Map(bool blocking=true) const = 0;
+
+    /// Unmap the tensor data
+    virtual void Unmap() const = 0;
+
+    /// Map the tensor data for access. Must be paired with call to Unmap().
+    /// \param blocking hint to block the calling thread until all other accesses are complete. (backend dependent)
+    /// \return pointer to the first element of the mapped data.
+    void* Map(bool blocking=true)
+    {
+        return const_cast<void*>(static_cast<const ITensorHandle*>(this)->Map(blocking));
+    }
+
+    /// Unmap the tensor data that was previously mapped with call to Map().
+    void Unmap()
+    {
+        return static_cast<const ITensorHandle*>(this)->Unmap();
+    }
+
+    /// 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.
+    /// \return a TensorShape filled with the strides for each dimension
+    virtual TensorShape GetStrides() const = 0;
+
+    /// Get the number of elements for each dimension orderd from slowest iterating dimension
+    /// to fastest iterating dimension.
+    /// \return a TensorShape filled with the number of elements for each dimension.
+    virtual TensorShape GetShape() const = 0;
+};
+
+}
-- 
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