/* * 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. */ /*! * Implementation of Node API * \file node.cc */ #include <tvm/node/node.h> #include <memory> #include <atomic> #include <mutex> #include <unordered_map> // TODO(tqchen): // Think of re-organize and consolidate with object. namespace tvm { namespace { // single manager of operator information. struct TypeManager { // mutex to avoid registration from multiple threads. // recursive is needed for trigger(which calls UpdateAttrMap) std::mutex mutex; std::atomic<uint32_t> type_counter{0}; std::unordered_map<std::string, uint32_t> key2index; std::vector<std::string> index2key; // get singleton of the static TypeManager* Global() { static TypeManager inst; return &inst; } }; } // namespace TVM_DLL const bool Node::_DerivedFrom(uint32_t tid) const { static uint32_t tindex = TypeKey2Index(Node::_type_key); return tid == tindex; } // this is slow, usually caller always hold the result in a static variable. TVM_DLL uint32_t Node::TypeKey2Index(const char* key) { TypeManager *t = TypeManager::Global(); std::lock_guard<std::mutex>(t->mutex); std::string skey = key; auto it = t->key2index.find(skey); if (it != t->key2index.end()) { return it->second; } uint32_t tid = ++(t->type_counter); t->key2index[skey] = tid; t->index2key.push_back(skey); return tid; } TVM_DLL const char* Node::TypeIndex2Key(uint32_t index) { TypeManager *t = TypeManager::Global(); std::lock_guard<std::mutex>(t->mutex); CHECK_NE(index, 0); return t->index2key.at(index - 1).c_str(); } } // namespace tvm