Matteo Martincigh | 2e7f6ad | 2019-07-24 09:54:26 +0100 | [diff] [blame] | 1 | // |
| 2 | // Copyright © 2017 Arm Ltd. All rights reserved. |
| 3 | // SPDX-License-Identifier: MIT |
| 4 | // |
| 5 | |
| 6 | #include "DynamicBackend.hpp" |
| 7 | #include "DynamicBackendUtils.hpp" |
| 8 | |
| 9 | namespace armnn |
| 10 | { |
| 11 | |
| 12 | DynamicBackend::DynamicBackend(const void* sharedObjectHandle) |
| 13 | : m_BackendIdFunction(nullptr) |
| 14 | , m_BackendVersionFunction(nullptr) |
| 15 | , m_BackendFactoryFunction(nullptr) |
| 16 | , m_Handle(const_cast<void*>(sharedObjectHandle), &DynamicBackendUtils::CloseHandle) |
| 17 | { |
| 18 | if (m_Handle == nullptr) |
| 19 | { |
| 20 | throw InvalidArgumentException("Cannot create a DynamicBackend object from an invalid shared object handle"); |
| 21 | } |
| 22 | |
| 23 | // These calls will throw in case of error |
| 24 | m_BackendIdFunction = SetFunctionPointer<IdFunctionType>("GetBackendId"); |
| 25 | m_BackendVersionFunction = SetFunctionPointer<VersionFunctionType>("GetVersion"); |
| 26 | m_BackendFactoryFunction = SetFunctionPointer<FactoryFunctionType>("BackendFactory"); |
| 27 | |
| 28 | // Check that the backend is compatible with the current Backend API |
| 29 | BackendId backendId = GetBackendId(); |
| 30 | BackendVersion backendVersion = GetBackendVersion(); |
| 31 | if (!DynamicBackendUtils::IsBackendCompatible(backendVersion)) |
| 32 | { |
| 33 | throw RuntimeException(boost::str(boost::format("The dynamic backend %1% (version %2%) is not compatible" |
| 34 | "with the current Backend API (vesion %3%)") |
| 35 | % backendId |
| 36 | % backendVersion |
| 37 | % IBackendInternal::GetApiVersion())); |
| 38 | } |
| 39 | } |
| 40 | |
| 41 | BackendId DynamicBackend::GetBackendId() |
| 42 | { |
| 43 | if (m_BackendIdFunction == nullptr) |
| 44 | { |
| 45 | throw RuntimeException("GetBackendId error: invalid function pointer"); |
| 46 | } |
| 47 | |
| 48 | return BackendId(m_BackendIdFunction()); |
| 49 | } |
| 50 | |
| 51 | BackendVersion DynamicBackend::GetBackendVersion() |
| 52 | { |
| 53 | if (m_BackendVersionFunction == nullptr) |
| 54 | { |
| 55 | throw RuntimeException("GetBackendVersion error: invalid function pointer"); |
| 56 | } |
| 57 | |
| 58 | uint32_t major = 0; |
| 59 | uint32_t minor = 0; |
| 60 | m_BackendVersionFunction(&major, &minor); |
| 61 | |
| 62 | return BackendVersion{ major, minor }; |
| 63 | } |
| 64 | |
| 65 | IBackendInternalUniquePtr DynamicBackend::GetBackend() |
| 66 | { |
| 67 | if (m_BackendFactoryFunction == nullptr) |
| 68 | { |
| 69 | throw RuntimeException("GetBackend error: invalid function pointer"); |
| 70 | } |
| 71 | |
| 72 | auto backendPointer = reinterpret_cast<IBackendInternal*>(m_BackendFactoryFunction()); |
| 73 | if (backendPointer == nullptr) |
| 74 | { |
| 75 | throw RuntimeException("GetBackend error: backend instance must not be null"); |
| 76 | } |
| 77 | |
| 78 | return std::unique_ptr<IBackendInternal>(backendPointer); |
| 79 | } |
| 80 | |
| 81 | template<typename BackendFunctionType> |
| 82 | BackendFunctionType DynamicBackend::SetFunctionPointer(const std::string& backendFunctionName) |
| 83 | { |
| 84 | if (m_Handle == nullptr) |
| 85 | { |
| 86 | throw RuntimeException("SetFunctionPointer error: invalid shared object handle"); |
| 87 | } |
| 88 | |
| 89 | if (backendFunctionName.empty()) |
| 90 | { |
| 91 | throw RuntimeException("SetFunctionPointer error: backend function name must not be empty"); |
| 92 | } |
| 93 | |
| 94 | // This call will throw in case of error |
| 95 | auto functionPointer = DynamicBackendUtils::GetEntryPoint<BackendFunctionType>(m_Handle.get(), |
| 96 | backendFunctionName.c_str()); |
| 97 | if (!functionPointer) |
| 98 | { |
| 99 | throw RuntimeException("SetFunctionPointer error: invalid backend function pointer returned"); |
| 100 | } |
| 101 | |
| 102 | return functionPointer; |
| 103 | } |
| 104 | |
| 105 | } // namespace armnn |