TensorCache.h

// Copyright 2024, UChicago Argonne, LLC
// All Rights Reserved
// Software Name: NEML2 -- the New Engineering material Model Library, version 2
// By: Argonne National Laboratory
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#pragma once
 
#include "neml2/tensors/Tensor.h"
 
namespace neml2
{
struct TensorCache
{
public:
  TensorCache(std::function<Tensor(const TensorOptions &)> &&);

  const Tensor & operator()(const TensorOptions &);
 
private:
  struct CacheKey
  {
    Dtype dtype = kFloat64;
    Device device;
    bool operator==(const CacheKey & other) const;
  };

  std::function<Tensor(const TensorOptions &)> _creator;

  std::vector<CacheKey> _cached_keys;

  std::vector<Tensor> _cached_tensors;
};
} // namespace neml2