IVGCVSW-6635 Expose a new MockWorkloadFactory and MockMemManager (Part 1)

* Create a MockBackend in armnnTestUtils.
* Create corresponding WorkloadFactory, TensorHandle, TensorHandleFactory
  MemoryManager and WorkloadFactoryHelper classes.

Signed-off-by: Colm Donelan <colm.donelan@arm.com>
Change-Id: I884731b109bc623a7272e5ad333ff754f8c13ae1

1 files changed, 176 insertions, 0 deletions

diff --git a/src/armnnTestUtils/MockTensorHandle.cpp b/src/armnnTestUtils/MockTensorHandle.cpp
new file mode 100644
index 0000000000..be4d5a8d92
--- /dev/null
+++ b/src/armnnTestUtils/MockTensorHandle.cpp
@@ -0,0 +1,176 @@
+//
+// Copyright © 2022 Arm Ltd and Contributors. All rights reserved.
+// SPDX-License-Identifier: MIT
+//
+
+#include "armnnTestUtils/MockTensorHandle.hpp"
+
+namespace armnn
+{
+
+MockTensorHandle::MockTensorHandle(const TensorInfo& tensorInfo, std::shared_ptr<MockMemoryManager>& memoryManager)
+    : m_TensorInfo(tensorInfo)
+    , m_MemoryManager(memoryManager)
+    , m_Pool(nullptr)
+    , m_UnmanagedMemory(nullptr)
+    , m_ImportFlags(static_cast<MemorySourceFlags>(MemorySource::Undefined))
+    , m_Imported(false)
+    , m_IsImportEnabled(false)
+{}
+
+MockTensorHandle::MockTensorHandle(const TensorInfo& tensorInfo, MemorySourceFlags importFlags)
+    : m_TensorInfo(tensorInfo)
+    , m_Pool(nullptr)
+    , m_UnmanagedMemory(nullptr)
+    , m_ImportFlags(importFlags)
+    , m_Imported(false)
+    , m_IsImportEnabled(true)
+{}
+
+MockTensorHandle::~MockTensorHandle()
+{
+    if (!m_Pool)
+    {
+        // unmanaged
+        if (!m_Imported)
+        {
+            ::operator delete(m_UnmanagedMemory);
+        }
+    }
+}
+
+void MockTensorHandle::Manage()
+{
+    if (!m_IsImportEnabled)
+    {
+        ARMNN_ASSERT_MSG(!m_Pool, "MockTensorHandle::Manage() called twice");
+        ARMNN_ASSERT_MSG(!m_UnmanagedMemory, "MockTensorHandle::Manage() called after Allocate()");
+
+        m_Pool = m_MemoryManager->Manage(m_TensorInfo.GetNumBytes());
+    }
+}
+
+void MockTensorHandle::Allocate()
+{
+    // If import is enabled, do not allocate the tensor
+    if (!m_IsImportEnabled)
+    {
+
+        if (!m_UnmanagedMemory)
+        {
+            if (!m_Pool)
+            {
+                // unmanaged
+                m_UnmanagedMemory = ::operator new(m_TensorInfo.GetNumBytes());
+            }
+            else
+            {
+                m_MemoryManager->Allocate(m_Pool);
+            }
+        }
+        else
+        {
+            throw InvalidArgumentException("MockTensorHandle::Allocate Trying to allocate a MockTensorHandle"
+                                           "that already has allocated memory.");
+        }
+    }
+}
+
+const void* MockTensorHandle::Map(bool /*unused*/) const
+{
+    return GetPointer();
+}
+
+void* MockTensorHandle::GetPointer() const
+{
+    if (m_UnmanagedMemory)
+    {
+        return m_UnmanagedMemory;
+    }
+    else if (m_Pool)
+    {
+        return m_MemoryManager->GetPointer(m_Pool);
+    }
+    else
+    {
+        throw NullPointerException("MockTensorHandle::GetPointer called on unmanaged, unallocated tensor handle");
+    }
+}
+
+void MockTensorHandle::CopyOutTo(void* dest) const
+{
+    const void* src = GetPointer();
+    ARMNN_ASSERT(src);
+    memcpy(dest, src, m_TensorInfo.GetNumBytes());
+}
+
+void MockTensorHandle::CopyInFrom(const void* src)
+{
+    void* dest = GetPointer();
+    ARMNN_ASSERT(dest);
+    memcpy(dest, src, m_TensorInfo.GetNumBytes());
+}
+
+bool MockTensorHandle::Import(void* memory, MemorySource source)
+{
+    if (m_ImportFlags & static_cast<MemorySourceFlags>(source))
+    {
+        if (m_IsImportEnabled && source == MemorySource::Malloc)
+        {
+            // Check memory alignment
+            if (!CanBeImported(memory, source))
+            {
+                if (m_Imported)
+                {
+                    m_Imported        = false;
+                    m_UnmanagedMemory = nullptr;
+                }
+
+                return false;
+            }
+
+            // m_UnmanagedMemory not yet allocated.
+            if (!m_Imported && !m_UnmanagedMemory)
+            {
+                m_UnmanagedMemory = memory;
+                m_Imported        = true;
+                return true;
+            }
+
+            // m_UnmanagedMemory initially allocated with Allocate().
+            if (!m_Imported && m_UnmanagedMemory)
+            {
+                return false;
+            }
+
+            // m_UnmanagedMemory previously imported.
+            if (m_Imported)
+            {
+                m_UnmanagedMemory = memory;
+                return true;
+            }
+        }
+    }
+
+    return false;
+}
+
+bool MockTensorHandle::CanBeImported(void* memory, MemorySource source)
+{
+    if (m_ImportFlags & static_cast<MemorySourceFlags>(source))
+    {
+        if (m_IsImportEnabled && source == MemorySource::Malloc)
+        {
+            uintptr_t alignment = GetDataTypeSize(m_TensorInfo.GetDataType());
+            if (reinterpret_cast<uintptr_t>(memory) % alignment)
+            {
+                return false;
+            }
+
+            return true;
+        }
+    }
+    return false;
+}
+
+}    // namespace armnn