src/operator/nnpack/nnpack_util.h

/*
 * 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.
 */

/*!
 * Copyright (c) 2016 by Contributors
 * \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_