/* Copyright (c) 2016 PaddlePaddle Authors. All Rights Reserved.
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 <iostream>
#include <map>
#include <string>

#include "paddle/fluid/framework/data_type.h"
#include "paddle/fluid/framework/lod_tensor.h"
#include "paddle/fluid/framework/scope.h"
#include "paddle/fluid/framework/selected_rows.h"

namespace paddle {
namespace operators {
namespace detail {
class MPIClient {
 public:
  bool AsyncSendVariable(const std::string& ep,
                         const platform::DeviceContext& ctx,
                         const framework::Scope& scope,
                         const std::string& var_name,
                         int64_t time_out = 600 * 1000);

  bool AsyncGetVariable(const std::string& ep,
                        const platform::DeviceContext& ctx,
                        const framework::Scope& scope,
                        const std::string& var_name,
                        int64_t time_out = 600 * 1000);

  void AsyncSendBatchBarrier(const std::string& ep,
                             int64_t time_out = 600 * 1000);

  void AsyncSendFetchBarrier(const std::string& ep,
                             int64_t time_out = 600 * 1000);
  bool Wait();

 private:
  int64_t req_count_ = 0;
};
}  // namespace detail
}  // namespace operators
}  // namespace paddle