# Copyright (c) OpenMMLab. All rights reserved.
import torch


def get_device():
    device = None
    if torch.cuda.is_available():
        device = "cuda"
    else:
        try:
            import torch_npu  # noqa: F401

            device = "npu"
        except ImportError:
            pass
    try:
        import torch_mlu  # noqa: F401

        device = "mlu"
    except ImportError:
        pass

    if device is None:
        raise NotImplementedError(
            "Supports only CUDA or NPU. If your device is CUDA or NPU, "
            "please make sure that your environmental settings are "
            "configured correctly."
        )

    return device


def get_torch_device_module():
    device = get_device()
    if device == "cuda":
        return torch.cuda
    elif device == "npu":
        return torch.npu
    elif device == "mlu":
        return torch.mlu
    else:
        raise NotImplementedError