IVGCVSW-4210 Create a public API for the common backend files

 * Create a public API for the common backend files
 * Move OutputHandler to armnn internal
 * Remove unused headers

Signed-off-by: Matteo Martincigh <matteo.martincigh@arm.com>
Signed-off-by: Narumol Prangnawarat <narumol.prangnawarat@arm.com>
Change-Id: I3e86d908b021e3561befa9d45158d87d2cbb18c0

1 files changed, 54 insertions, 0 deletions

diff --git a/include/armnn/backends/DynamicBackend.hpp b/include/armnn/backends/DynamicBackend.hpp
new file mode 100644
index 0000000000..f888b1e27e
--- /dev/null
+++ b/include/armnn/backends/DynamicBackend.hpp
@@ -0,0 +1,54 @@
+//
+// Copyright © 2017 Arm Ltd. All rights reserved.
+// SPDX-License-Identifier: MIT
+//
+
+#pragma once
+
+#include "IBackendInternal.hpp"
+
+#include <armnn/BackendRegistry.hpp>
+
+#include <functional>
+#include <memory>
+
+namespace armnn
+{
+
+class DynamicBackend final
+{
+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();
+    BackendRegistry::FactoryFunction GetFactoryFunction();
+
+private:
+    /// Private utility functions
+    template<typename BackendFunctionType>
+    BackendFunctionType SetFunctionPointer(const std::string& backendFunctionName);
+    IBackendInternalUniquePtr CreateBackend();
+
+    /// 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;
+};
+
+using DynamicBackendPtr = std::unique_ptr<DynamicBackend>;
+
+} // namespace armnn