text: // Copyright (c) Microsoft Corporation. All rights reserved.
  // Licensed under the MIT License.
  
  #pragma once
  
  #include "core/framework/op_kernel.h"
  
  namespace onnxruntime {
  class KernelRegistry {
   public:
    KernelRegistry() = default;
  
    // Register a kernel with kernel definition and function to create the kernel.
    Status Register(KernelDefBuilder& kernel_def_builder,
                    const KernelCreateFn& kernel_creator);
  
    Status Register(KernelCreateInfo&& create_info);
  
    // Mainly for provide debug info
    std::vector<std::string> GetAllRegisteredOpNames() const;
  
    // factory functions should always return a unique_ptr for maximum flexibility
    // for its clients unless the factory is managing the lifecycle of the pointer
    // itself.
    // TODO(Task:132) Make usage of unique_ptr/shared_ptr as out param consistent
    Status CreateKernel(const onnxruntime::Node& node,
                        const IExecutionProvider& execution_provider,
                        const std::unordered_map<int, MLValue>& initialized_tensors,
                        const MLValueNameIdxMap& mlvalue_name_idx_map,
                        const FuncManager& funcs_mgr,
                        std::unique_ptr<OpKernel>& op_kernel) const;
  
    // Check if an execution provider can create kernel for a node and return
    // the kernel if so
    const KernelCreateInfo* TryFindKernel(const onnxruntime::Node& node,
                                          onnxruntime::ProviderType exec_provider) const;
  
   private:
    // Check if the node's input/outpuData/attributes are compatible with this
    // kernel_def, If so, the kernel defined by the kernel_def is used to
    // execute this node. exec_provider is used to match kernel when node has no provider
    static bool VerifyKernelDef(const onnxruntime::Node& node,
                                const KernelDef& kernel_def,
                                std::string& error_str,
                                onnxruntime::ProviderType exec_provider = "");
  
    // Kernel create function map from op name to kernel creation info.
    KernelCreateMap kernel_creator_fn_map_;
  };
  }  // namespace onnxruntime
  