| /* |
| * 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 tvm/ir/env_func.h |
| * \brief Serializable global function used in IR. |
| */ |
| #ifndef TVM_IR_ENV_FUNC_H_ |
| #define TVM_IR_ENV_FUNC_H_ |
| |
| #include <tvm/node/reflection.h> |
| |
| #include <string> |
| #include <utility> |
| |
| namespace tvm { |
| /*! |
| * \brief A serializable function backed by TVM's global environment. |
| * |
| * This is a wrapper to enable serializable global PackedFunc. |
| * An EnvFunc is saved by its name in the global registry |
| * under the assumption that the same function is registered during load. |
| * \sa EnvFunc |
| */ |
| class EnvFuncNode : public Object { |
| public: |
| /*! \brief Unique name of the global function */ |
| String name; |
| /*! \brief The internal packed function */ |
| runtime::PackedFunc func; |
| /*! \brief constructor */ |
| EnvFuncNode() {} |
| |
| void VisitAttrs(AttrVisitor* v) { v->Visit("name", &name); } |
| |
| bool SEqualReduce(const EnvFuncNode* other, SEqualReducer equal) const { |
| // name uniquely identifies the env function. |
| return name == other->name; |
| } |
| |
| void SHashReduce(SHashReducer hash_reduce) const { |
| // Name uniquely identifies the env function. |
| hash_reduce(name); |
| } |
| |
| static constexpr const char* _type_key = "EnvFunc"; |
| static constexpr bool _type_has_method_sequal_reduce = true; |
| static constexpr bool _type_has_method_shash_reduce = true; |
| TVM_DECLARE_FINAL_OBJECT_INFO(EnvFuncNode, Object); |
| }; |
| |
| /*! |
| * \brief Managed reference to EnvFuncNode. |
| * \sa EnvFuncNode |
| */ |
| class EnvFunc : public ObjectRef { |
| public: |
| EnvFunc() {} |
| explicit EnvFunc(ObjectPtr<Object> n) : ObjectRef(n) {} |
| /*! \return The internal global function pointer */ |
| const EnvFuncNode* operator->() const { return static_cast<const EnvFuncNode*>(get()); } |
| /*! |
| * \brief Invoke the function. |
| * \param args The arguments |
| * \returns The return value. |
| */ |
| template <typename... Args> |
| runtime::TVMRetValue operator()(Args&&... args) const { |
| const EnvFuncNode* n = operator->(); |
| CHECK(n != nullptr); |
| return n->func(std::forward<Args>(args)...); |
| } |
| /*! |
| * \brief Get a global function based on the name. |
| * \param name The name of the global function. |
| * \return The created global function. |
| * \note The function can be unique |
| */ |
| TVM_DLL static EnvFunc Get(const String& name); |
| /*! \brief specify container node */ |
| using ContainerType = EnvFuncNode; |
| }; |
| |
| /*! |
| * \brief Please refer to \ref TypedEnvFuncAnchor "TypedEnvFunc<R(Args..)>" |
| */ |
| template <typename FType> |
| class TypedEnvFunc; |
| |
| /*! |
| * \anchor TypedEnvFuncAnchor |
| * \brief A typed version of EnvFunc. |
| * It is backed by a GlobalFuncNode internally. |
| * |
| * \tparam R The return value of the function. |
| * \tparam Args The argument signature of the function. |
| * \sa EnvFunc |
| */ |
| template <typename R, typename... Args> |
| class TypedEnvFunc<R(Args...)> : public ObjectRef { |
| public: |
| /*! \brief short hand for this function type */ |
| using TSelf = TypedEnvFunc<R(Args...)>; |
| TypedEnvFunc() {} |
| explicit TypedEnvFunc(ObjectPtr<Object> n) : ObjectRef(n) {} |
| /*! |
| * \brief Assign global function to a TypedEnvFunc |
| * \param other Another global function. |
| * \return reference to self. |
| */ |
| TSelf& operator=(const EnvFunc& other) { |
| ObjectRef::operator=(other); |
| return *this; |
| } |
| /*! \return The internal global function pointer */ |
| const EnvFuncNode* operator->() const { return static_cast<const EnvFuncNode*>(get()); } |
| /*! |
| * \brief Invoke the function. |
| * \param args The arguments |
| * \returns The return value. |
| */ |
| R operator()(Args... args) const { |
| const EnvFuncNode* n = operator->(); |
| CHECK(n != nullptr); |
| return runtime::detail::typed_packed_call_dispatcher<R>::run(n->func, |
| std::forward<Args>(args)...); |
| } |
| /*! \brief specify container node */ |
| using ContainerType = EnvFuncNode; |
| }; |
| |
| } // namespace tvm |
| #endif // TVM_IR_ENV_FUNC_H_ |