#ifndef PADDLE_PSERVER_OPTIMIZER_H
#define PADDLE_PSERVER_OPTIMIZER_H

typedef enum {
  PADDLE_ELEMENT_TYPE_INT32 = 0,
  PADDLE_ELEMENT_TYPE_UINT32 = 1,
  PADDLE_ELEMENT_TYPE_INT64 = 2,
  PADDLE_ELEMENT_TYPE_UINT64 = 3,
  PADDLE_ELEMENT_TYPE_FLOAT32 = 4,
  PADDLE_ELEMENT_TYPE_FLOAT64 = 5,
} paddle_element_type;

struct paddle_optimizer;
struct paddle_optimizer* paddle_create_SGD_optimizer(double learning_rate);
void paddle_release_optimizer(struct paddle_optimizer* o);
int paddle_update_parameter(struct paddle_optimizer* o,
                            void* buffer,
                            paddle_element_type element_type,
                            const void* gradient,
                            int num_bytes);

#endif /* PADDLE_PSERVER_OPTIMIZER_H */