text: /*
   * 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 nnpack_util.h
   * \brief
   * \author Carwin
  */
  #ifndef MXNET_OPERATOR_NNPACK_NNPACK_UTIL_H_
  #define MXNET_OPERATOR_NNPACK_NNPACK_UTIL_H_
  
  #include <dmlc/logging.h>
  #include <dmlc/parameter.h>
  #include <nnpack.h>
  
  namespace mxnet {
  namespace op {
  
  class NNPACKInitialize {
   public:
    pthreadpool_t threadpool;
  
   public:
    NNPACKInitialize() {
      nnp_status status = nnp_initialize();
      if (nnp_status_success != status) {
        LOG(FATAL) << "nnp_initialize failed status=" << status;
      }
      int num_threads = dmlc::GetEnv("MXNET_CPU_NNPACK_NTHREADS", 4);
      this->threadpool = pthreadpool_create(num_threads);
    }
    virtual ~NNPACKInitialize() {
      nnp_status status = nnp_deinitialize();
      if (nnp_status_success != status) {
        LOG(FATAL) << "nnp_deinitialize failed status=" << status;
      }
      pthreadpool_destroy(threadpool);
    }
  };
  
  // nnpackinitialize will be used in all other nnpack op
  extern NNPACKInitialize nnpackinitialize;
  
  }  // namespace op
  }  // namespace mxnet
  
  #endif  // MXNET_OPERATOR_NNPACK_NNPACK_UTIL_H_
  