1 files changed, 89 insertions, 0 deletions
diff --git a/src/backends/backendsCommon/IBackendInternal.cpp b/src/backends/backendsCommon/IBackendInternal.cpp
new file mode 100644
index 0000000000..261613c490
--- /dev/null
+++ b/src/backends/backendsCommon/IBackendInternal.cpp
@@ -0,0 +1,89 @@
+//
+// Copyright © 2017 Arm Ltd. All rights reserved.
+// SPDX-License-Identifier: MIT
+//
+
+#include "IBackendInternal.hpp"
+
+namespace armnn
+{
+
+ARMNN_NO_DEPRECATE_WARN_BEGIN
+IBackendInternal::ISubGraphConverterPtr IBackendInternal::CreateSubGraphConverter(
+    const std::shared_ptr<SubGraph>& subGraph) const
+{
+    return ISubGraphConverterPtr{};
+}
+
+IBackendInternal::Optimizations IBackendInternal::GetOptimizations() const
+{
+    return Optimizations{};
+}
+
+IBackendInternal::SubGraphUniquePtr IBackendInternal::OptimizeSubGraph(const SubGraph& subGraph,
+                                                                       bool& optimizationAttempted) const
+{
+    optimizationAttempted = false;
+    return nullptr;
+}
+ARMNN_NO_DEPRECATE_WARN_END
+
+IMemoryManagerUniquePtr IBackendInternal::CreateMemoryManager() const
+{
+    return IMemoryManagerUniquePtr();
+}
+
+IBackendInternal::IBackendContextPtr IBackendInternal::CreateBackendContext(const IRuntime::CreationOptions&) const
+{
+    return IBackendContextPtr{};
+}
+
+// Default implementation of OptimizeSubgraphView for backward compatibility with the old API.
+// Override this method with a custom optimization implementation.
+OptimizationViews IBackendInternal::OptimizeSubgraphView(const SubgraphView& subgraph) const
+{
+    bool optimizationAttempted = false;
+
+    ARMNN_NO_DEPRECATE_WARN_BEGIN
+    SubGraphUniquePtr optSubgraph = OptimizeSubGraph(subgraph, optimizationAttempted);
+    ARMNN_NO_DEPRECATE_WARN_END
+
+    OptimizationViews result;
+    if (!optimizationAttempted)
+    {
+        result.AddUntouchedSubgraph(SubgraphView(subgraph));
+    }
+    else if (optSubgraph)
+    {
+        result.AddSubstitution({subgraph, SubgraphView(*optSubgraph.get())});
+    }
+    else
+    {
+        result.AddFailedSubgraph(SubgraphView(subgraph));
+    }
+
+    return result;
+}
+
+bool IBackendInternal::SupportsTensorAllocatorAPI() const
+{
+    return !GetHandleFactoryPreferences().empty();
+}
+
+ITensorHandleFactory::FactoryId IBackendInternal::GetBackwardCompatibleFavoriteHandleFactory()
+{
+    auto favorites = GetHandleFactoryPreferences();
+    if (favorites.empty())
+    {
+        return ITensorHandleFactory::LegacyFactoryId;
+    }
+
+    return favorites[0];
+}
+
+std::vector<ITensorHandleFactory::FactoryId> IBackendInternal::GetHandleFactoryPreferences() const
+{
+    return std::vector<ITensorHandleFactory::FactoryId>();
+}
+
+} // namespace armnn