IVGCVSW-3556 Create the DynamicBackend class

 * Created the new DynamicBackend class with all the necessary
   getters/utility functions
 * Created function types to mirror the backend interface functions

Signed-off-by: Matteo Martincigh <matteo.martincigh@arm.com>
Change-Id: I80a29e6e8a8d0b0655caba63d12cf62e0d8fc832

1 files changed, 47 insertions, 0 deletions

diff --git a/src/backends/backendsCommon/DynamicBackend.hpp b/src/backends/backendsCommon/DynamicBackend.hpp
new file mode 100644
index 0000000000..06655293e7
--- /dev/null
+++ b/src/backends/backendsCommon/DynamicBackend.hpp
@@ -0,0 +1,47 @@
+//
+// Copyright © 2017 Arm Ltd. All rights reserved.
+// SPDX-License-Identifier: MIT
+//
+
+#pragma once
+
+#include "IBackendInternal.hpp"
+
+#include <functional>
+#include <memory>
+
+namespace armnn
+{
+
+class DynamicBackend
+{
+public:
+    using HandleCloser = std::function<void(const void*)>;
+    using HandlePtr = std::unique_ptr<void, HandleCloser>;
+
+    explicit DynamicBackend(const void* sharedObjectHandle);
+
+    /// Public dynamic backend functions
+    BackendId GetBackendId();
+    BackendVersion GetBackendVersion();
+    IBackendInternalUniquePtr GetBackend();
+
+private:
+    template<typename BackendFunctionType>
+    BackendFunctionType SetFunctionPointer(const std::string& backendFunctionName);
+
+    /// Backend function pointer types
+    using IdFunctionType      = const char*(*)();
+    using VersionFunctionType = void(*)(uint32_t*, uint32_t*);
+    using FactoryFunctionType = void*(*)();
+
+    /// Backend function pointers
+    IdFunctionType      m_BackendIdFunction;
+    VersionFunctionType m_BackendVersionFunction;
+    FactoryFunctionType m_BackendFactoryFunction;
+
+    /// Shared object handle
+    HandlePtr m_Handle;
+};
+
+} // namespace armnn