/* * 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/registry.h> #include <tvm/runtime/memory.h> #include <tvm/runtime/c_backend_api.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("module._GetSystemLib") .set_body([](TVMArgs args, TVMRetValue* rv) { static auto mod = CreateModuleFromLibrary( SystemLibrary::Global()); *rv = mod; }); } // namespace runtime } // namespace tvm int TVMBackendRegisterSystemLibSymbol(const char* name, void* ptr) { tvm::runtime::SystemLibrary::Global()->RegisterSymbol(name, ptr); return 0; }