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//
// Copyright © 2017 Arm Ltd. All rights reserved.
// SPDX-License-Identifier: MIT
//
#include <armnn/Types.hpp>
#include <armnn/BackendRegistry.hpp>
#include <armnn/backends/IBackendInternal.hpp>
#include <reference/RefBackend.hpp>
#include <doctest/doctest.h>
namespace
{
class SwapRegistryStorage : public armnn::BackendRegistry
{
public:
SwapRegistryStorage() : armnn::BackendRegistry()
{
Swap(armnn::BackendRegistryInstance(), m_TempStorage);
}
~SwapRegistryStorage()
{
Swap(armnn::BackendRegistryInstance(),m_TempStorage);
}
private:
FactoryStorage m_TempStorage;
};
}
TEST_SUITE("BackendRegistryTests")
{
TEST_CASE("SwapRegistry")
{
using namespace armnn;
auto nFactories = BackendRegistryInstance().Size();
{
SwapRegistryStorage helper;
CHECK(BackendRegistryInstance().Size() == 0);
}
CHECK(BackendRegistryInstance().Size() == nFactories);
}
TEST_CASE("TestRegistryHelper")
{
using namespace armnn;
SwapRegistryStorage helper;
bool called = false;
BackendRegistry::StaticRegistryInitializer factoryHelper(
BackendRegistryInstance(),
"HelloWorld",
[&called]()
{
called = true;
return armnn::IBackendInternalUniquePtr(nullptr);
}
);
// sanity check: the factory has not been called yet
CHECK(called == false);
auto factoryFunction = BackendRegistryInstance().GetFactory("HelloWorld");
// sanity check: the factory still not called
CHECK(called == false);
factoryFunction();
CHECK(called == true);
BackendRegistryInstance().Deregister("HelloWorld");
}
TEST_CASE("TestDirectCallToRegistry")
{
using namespace armnn;
SwapRegistryStorage helper;
bool called = false;
BackendRegistryInstance().Register(
"HelloWorld",
[&called]()
{
called = true;
return armnn::IBackendInternalUniquePtr(nullptr);
}
);
// sanity check: the factory has not been called yet
CHECK(called == false);
auto factoryFunction = BackendRegistryInstance().GetFactory("HelloWorld");
// sanity check: the factory still not called
CHECK(called == false);
factoryFunction();
CHECK(called == true);
BackendRegistryInstance().Deregister("HelloWorld");
}
// Test that backends can throw exceptions during their factory function to prevent loading in an unsuitable
// environment. For example Neon Backend loading on armhf device without neon support.
// In reality the dynamic backend is loaded in during the LoadDynamicBackends(options.m_DynamicBackendsPath)
// step of runtime constructor, then the factory function is called to check if supported, in case
// of Neon not being detected the exception is raised and so the backend is not added to the supportedBackends
// list
TEST_CASE("ThrowBackendUnavailableException")
{
using namespace armnn;
const BackendId mockBackendId("MockDynamicBackend");
const std::string exceptionMessage("Mock error message to test unavailable backend");
// Register the mock backend with a factory function lambda that always throws
BackendRegistryInstance().Register(mockBackendId,
[exceptionMessage]()
{
throw armnn::BackendUnavailableException(exceptionMessage);
return IBackendInternalUniquePtr(); // Satisfy return type
});
// Get the factory function of the mock backend
auto factoryFunc = BackendRegistryInstance().GetFactory(mockBackendId);
try
{
// Call the factory function as done during runtime backend registering
auto backend = factoryFunc();
FAIL("Expected exception to have been thrown");
}
catch (const BackendUnavailableException& e)
{
// Caught
CHECK_EQ(e.what(), exceptionMessage);
}
}
}
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