IVGCVSW-1896 : SubGraph selector

Change-Id: Iae9a76b10d84d7ba80136b54355f8d37d2df475d

1 files changed, 40 insertions, 0 deletions

diff --git a/src/armnn/SubGraphSelector.hpp b/src/armnn/SubGraphSelector.hpp
new file mode 100644
index 0000000000..f96b986a2e
--- /dev/null
+++ b/src/armnn/SubGraphSelector.hpp
@@ -0,0 +1,40 @@
+//
+// Copyright © 2017 Arm Ltd. All rights reserved.
+// SPDX-License-Identifier: MIT
+//
+#pragma once
+
+#include "SubGraph.hpp"
+#include <functional>
+#include <memory>
+
+namespace armnn
+{
+
+class Layer;
+class Graph;
+
+class SubGraphSelector final
+{
+public:
+    using SubGraphPtr = std::unique_ptr<SubGraph>;
+    using SubGraphs = std::vector<SubGraphPtr>;
+    using LayerSelectorFunction = std::function<bool(const Layer&)>;
+
+    /// Selects subgraphs of a graph based on the selector function
+    /// and the algorithm. Since the SubGraphs returns modifiable pointers
+    /// the input and output slots of the graph:
+    ///  1) the graph cannot be const
+    ///  2) the caller need to make sure that the SubGraphs lifetime is
+    ///     shorter than the graph's
+    static SubGraphs SelectSubGraphs(Graph& graph,
+                                     const LayerSelectorFunction& selector);
+
+private:
+    // this is a utility class, don't construct or copy
+    SubGraphSelector() = delete;
+    SubGraphSelector(const SubGraphSelector&) = delete;
+    SubGraphSelector & operator=(const SubGraphSelector&) = delete;
+};
+
+} // namespace armnn