/**
 * Copyright 2019-2020 Huawei Technologies Co., Ltd
 *
 * 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.
 */

#ifndef GE_HYBRID_EXECUTOR_RT_CALLBACK_MANAGER_H_
#define GE_HYBRID_EXECUTOR_RT_CALLBACK_MANAGER_H_

#include <condition_variable>
#include <functional>
#include <future>
#include <memory>

#include "common/blocking_queue.h"
#include "ge/ge_api_error_codes.h"
#include "runtime/rt.h"

namespace ge {
namespace hybrid {
class CallbackManager {
 public:
  explicit CallbackManager(rtStream_t stream);

  ~CallbackManager() = default;

  Status Init();

  Status Destroy();

  Status RegisterCallback(rtCallback_t callback, void *user_data);
  Status RegisterCallback(const std::function<void()> &callback);

 private:
  Status CallbackProcess(rtContext_t context);
  static void RtCallbackFunc(void *data);

  BlockingQueue<std::pair<rtEvent_t, std::pair<rtCallback_t, void *>>> callback_queue_;
  rtStream_t stream_;
  std::future<Status> ret_future_;
};
}  // namespace hybrid
}  // namespace ge

#endif // GE_HYBRID_EXECUTOR_RT_CALLBACK_MANAGER_H_
