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#pragma once
#include <torch/csrc/lazy/backend/backend_device.h>
#include <torch/csrc/lazy/core/shape.h>
#include <cstring>
namespace torch {
namespace lazy {
class TORCH_API BackendData {
public:
struct Info {
/**
* Used by Lazy Graph Executor to tag info on BackendData objs
* */
virtual ~Info() = default;
};
/**
* Represents (Tensor) data stored on a backend device
* in its native format.
* */
using Handle = int64_t;
BackendData(BackendDevice device, Shape shape)
: device_(std::move(device)), shape_(std::move(shape)) {}
virtual ~BackendData() = default;
const BackendDevice& device() const {
return device_;
}
const Shape& shape() const {
return shape_;
}
Info* info() const {
return info_.get();
}
std::shared_ptr<Info> SetInfo(std::shared_ptr<Info> info) {
std::swap(info, info_);
return info;
}
virtual Handle GetHandle() = 0;
virtual void Assign(const BackendData& data) = 0;
virtual bool HasValue() const = 0;
private:
BackendDevice device_;
Shape shape_;
std::shared_ptr<Info> info_;
};
using BackendDataPtr = std::shared_ptr<BackendData>;
} // namespace lazy
} // namespace torch
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