reid from https://github.com/michuanhaohao/reid-strong-baseline
zhangmeng
2020-01-10 c3765bd24fe73747688a0ec2a550f219c9acb384
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#pragma once
 
#include <ATen/core/Generator.h>
#include <ATen/core/MT19937RNGEngine.h>
#include <ATen/core/PhiloxRNGEngine.h>
#include <c10/util/Optional.h>
 
namespace at {
 
struct CAFFE2_API CPUGenerator : public Generator {
  // Constructors
  CPUGenerator(uint64_t seed_in = default_rng_seed_val);
  ~CPUGenerator() = default;
 
  // CPUGenerator methods
  std::shared_ptr<CPUGenerator> clone() const;
  void set_current_seed(uint64_t seed) override;
  uint64_t current_seed() const override;
  uint64_t seed() override;
  static DeviceType device_type();
  uint32_t random();
  uint64_t random64();
  c10::optional<float> next_float_normal_sample();
  c10::optional<double> next_double_normal_sample();
  void set_next_float_normal_sample(c10::optional<float> randn);
  void set_next_double_normal_sample(c10::optional<double> randn);
  at::mt19937 engine();
  void set_engine(at::mt19937 engine);
 
private:
  CPUGenerator* clone_impl() const override;
  at::mt19937 engine_;
  c10::optional<float> next_float_normal_sample_;
  c10::optional<double> next_double_normal_sample_;
};
 
namespace detail {
 
CAFFE2_API CPUGenerator* getDefaultCPUGenerator();
CAFFE2_API std::shared_ptr<CPUGenerator> createCPUGenerator(uint64_t seed_val = default_rng_seed_val);
 
} // namespace detail
 
}