| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| |
| /*! |
| * \file system_library.cc |
| * \brief Create library module that directly get symbol from the system lib. |
| */ |
| #include <tvm/runtime/c_backend_api.h> |
| #include <tvm/runtime/memory.h> |
| #include <tvm/runtime/registry.h> |
| |
| #include <mutex> |
| |
| #include "library_module.h" |
| |
| namespace tvm { |
| namespace runtime { |
| |
| class SystemLibrary : public Library { |
| public: |
| SystemLibrary() = default; |
| |
| void* GetSymbol(const char* name) final { |
| std::lock_guard<std::mutex> lock(mutex_); |
| auto it = tbl_.find(name); |
| if (it != tbl_.end()) { |
| return it->second; |
| } else { |
| return nullptr; |
| } |
| } |
| |
| void RegisterSymbol(const std::string& name, void* ptr) { |
| std::lock_guard<std::mutex> lock(mutex_); |
| auto it = tbl_.find(name); |
| if (it != tbl_.end() && ptr != it->second) { |
| LOG(WARNING) << "SystemLib symbol " << name << " get overriden to a different address " << ptr |
| << "->" << it->second; |
| } |
| tbl_[name] = ptr; |
| } |
| |
| static const ObjectPtr<SystemLibrary>& Global() { |
| static auto inst = make_object<SystemLibrary>(); |
| return inst; |
| } |
| |
| private: |
| // Internal mutex |
| std::mutex mutex_; |
| // Internal symbol table |
| std::unordered_map<std::string, void*> tbl_; |
| }; |
| |
| TVM_REGISTER_GLOBAL("runtime.SystemLib").set_body_typed([]() { |
| static auto mod = CreateModuleFromLibrary(SystemLibrary::Global()); |
| return mod; |
| }); |
| } // namespace runtime |
| } // namespace tvm |
| |
| int TVMBackendRegisterSystemLibSymbol(const char* name, void* ptr) { |
| tvm::runtime::SystemLibrary::Global()->RegisterSymbol(name, ptr); |
| return 0; |
| } |