code: def _hostalloc(self, size: int):
      return init_c_var(
          hip.hipDeviceptr_t(),
          lambda x: check(hip.hipHostMalloc(ctypes.byref(x), size, 0)),
      )
  
imports: from __future__ import annotations
  import ctypes, functools, subprocess, io
  from typing import Tuple, TypeVar, List
  import gpuctypes.hip
  from tinygrad.helpers import DEBUG, getenv, init_c_var, compile_cuda_style, encode_args_cuda_style, time_execution_cuda_style
  from tinygrad.helpers import from_mv, round_up, to_mv
  from tinygrad.device import Compiled, LRUAllocator, MallocAllocator
  from tinygrad.renderer.cstyle import HIPRenderer
  from tinygrad.codegen.kernel import LinearizerOptions
label_desc: Use image node_id 4 for calling the HIPAllocator obj's underlying member method code with example usage: obj._hostalloc(size) and returns: init_c_var