unique_ops.h

#ifndef CAFFE_OPERATORS_UNIQUE_OPS_H_
#define CAFFE_OPERATORS_UNIQUE_OPS_H_

#include <cmath>

#include "caffe2/core/context.h"
#include "caffe2/core/logging.h"
#include "caffe2/core/operator.h"
#include "caffe2/core/types.h"
#include "caffe2/utils/math.h"

namespace caffe2 {

template <class Context>
class UniqueOp : public Operator<Context> {
 public:
  USE_OPERATOR_CONTEXT_FUNCTIONS;
  USE_SIMPLE_CTOR_DTOR(UniqueOp)

  bool RunOnDevice() override {
    return DispatchHelper<TensorTypes<int32_t, int64_t>>::call(this, Input(0));
  }

  template <typename T>
  bool DoRunWithType();

 private:
  vector<int> order_;
  Tensor thrust_unique_buffer_;
  Tensor cuda_order_buffer_{Context::GetDeviceType()};
  Tensor second_order_buffer_{Context::GetDeviceType()};

 public:
  OUTPUT_TAGS(UNIQUE, REMAPPING);
};

} // namespace caffe2

#endif // CAFFE_OPERATORS_UNIQUE_OPS_H_