__init__.py 文件源码

def _wrap_function(function, ffi):
    @wraps(function)
    def safe_call(*args, **kwargs):
        args = tuple(ffi.cast(_torch_to_cffi.get(type(arg), 'void') + '*', arg._cdata)
                if torch.is_tensor(arg) or torch.is_storage(arg)
                else arg
                for arg in args)
        args = (function,) + args
        result = torch._C._safe_call(*args, **kwargs)
        if isinstance(result, ffi.CData):
            typeof = ffi.typeof(result)
            if typeof.kind == 'pointer':
                cdata = int(ffi.cast('uintptr_t', result))
                cname = typeof.item.cname
                if cname in _cffi_to_torch:
                    return _cffi_to_torch[cname](cdata=cdata)
        return result
    return safe_call