deeplearning4j/deeplearning4j

/* ******************************************************************************
 *
 *
 * This program and the accompanying materials are made available under the
 * terms of the Apache License, Version 2.0 which is available at
 * https://www.apache.org/licenses/LICENSE-2.0.
 *
 *  See the NOTICE file distributed with this work for additional
 *  information regarding copyright ownership.
 * 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.
 *
 * SPDX-License-Identifier: Apache-2.0
 ******************************************************************************/

//
// @author raver119@gmail.com
//

#ifndef SAMEDIFF_CALLABLEINTERFACE_H
#define SAMEDIFF_CALLABLEINTERFACE_H

#include <system/common.h>

#include <array>
#include <atomic>
#include <condition_variable>
#include <cstdint>
#include <functional>
#include <mutex>

namespace samediff {
/**
 * This class is suited for passing functions to execution threads without queues
 */
class CallableInterface {
 private:
  // parallel_for functions
  FUNC_1D _function_1d;
  FUNC_2D _function_2d;
  FUNC_3D _function_3d;

  // parallel function
  FUNC_DO _function_do;

  // reduction functions
  FUNC_RL _function_rl;
  FUNC_RD _function_rd;

  std::array<int64_t, 9> _arguments;

  volatile int _branch = 0;
  volatile uint32_t _thread_id = 0;
  volatile uint32_t _num_threads = 0;

  std::atomic<bool> _finished;
  std::atomic<bool> _filled;
  std::atomic<bool> _available;

  std::condition_variable _starter;
  std::condition_variable _finisher;

  int64_t *_lptr = nullptr;
  double *_dptr = nullptr;

  std::mutex _ms;
  std::mutex _mf;

 public:
  CallableInterface();
  ~CallableInterface() = default;

  void waitForTask();
  void waitForCompletion();

  void fill(int thread_id, int num_threads, int64_t *lpt, FUNC_RL func, int64_t start_x, int64_t stop_x, int64_t inc_x);
  void fill(int thread_id, int num_threads, double *dpt, FUNC_RD func, int64_t start_x, int64_t stop_x, int64_t inc_x);

  void fill(int thread_id, int num_threads, FUNC_DO func);
  void fill(int thread_id, int num_threads, FUNC_1D func, int64_t start_x, int64_t stop_x, int64_t inc_x);
  void fill(int thread_id, int num_threads, FUNC_2D func, int64_t start_x, int64_t stop_x, int64_t inc_x,
            int64_t start_y, int64_t stop_y, int64_t inc_y);
  void fill(int thread_id, int num_threads, FUNC_3D func, int64_t start_x, int64_t stop_x, int64_t inc_x,
            int64_t start_y, int64_t stop_y, int64_t inc_y, int64_t start_z, int64_t stop_z, int64_t inc_z);

  bool available();
  void markAvailable();
  void markUnavailable();

  void finish();

  void execute();
};
}  // namespace samediff

#endif  // DEV_TESTS_CALLABLEINTERFACE_H