cumlHandle.hpp

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/*
 * Copyright (c) 2019-2023, NVIDIA CORPORATION.
 *
 * Licensed 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.
 */
 
#pragma once
 
#include <cuml/cuml_api.h>
 
#include <raft/core/handle.hpp>
 
namespace ML {
 
class HandleMap {
 public:
  std::pair<cumlHandle_t, cumlError_t> createAndInsertHandle(cudaStream_t stream);
 
  std::pair<raft::handle_t*, cumlError_t> lookupHandlePointer(cumlHandle_t handle) const;
 
  cumlError_t removeAndDestroyHandle(cumlHandle_t handle);
 
  static const cumlHandle_t INVALID_HANDLE = -1;  
 
 private:
  std::unordered_map<cumlHandle_t, raft::handle_t*> _handleMap;  
  mutable std::mutex _mapMutex;                                  
  cumlHandle_t _nextHandle;                                      
};
 
extern HandleMap handleMap;
 
}  // end namespace ML