junrushao1994 commented on a change in pull request #10368:
URL: https://github.com/apache/tvm/pull/10368#discussion_r817441218
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File path: python/tvm/meta_schedule/utils.py
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@@ -31,6 +31,107 @@
from tvm.tir import FloatImm, IntImm
+def derived_object(cls: type) -> type:
+ """A decorator to register derived subclasses for TVM objects.
+
+ Parameters
+ ----------
+ cls : type
+ The derived class to be registered.
+
+ Returns
+ -------
+ cls : type
+ The decorated TVM object.
+
+ Example
+ -------
+ .. code-block:: python
+
+ @register_object("meta_schedule.PyRunner")
+ class _PyRunner(meta_schedule.Runner):
+ def __init__(self, methods: List[Callable]):
+ self.__init_handle_by_constructor__(_ffi_api.RunnerPyRunner,
*methods)
+
+ class PyRunner():
+ _tvm_metadata = {
+ "cls": _PyRunner,
+ "methods": ["run"]
+ }
+ def run(self, runner_inputs):
+ raise NotImplementedError
+
+ @derived_object
+ class LocalRunner(PyRunner):
+ def run(self, runner_inputs):
+ ...
+ """
+
+ import functools # pylint: disable=import-outside-toplevel
+ import weakref # pylint: disable=import-outside-toplevel
+
+ def _extract(inst: type, name: str):
+ """Extract function from intrinsic class."""
+
+ def method(*args, **kwargs):
+ return getattr(inst, name)(*args, **kwargs)
+
+ if getattr(base, name) is getattr(cls, name) and name != "__str__":
+ # for task scheduler return None means calling default function
+ # otherwise it will trigger a TVMError of method not implemented
+ # on the c++ side when you call the method, __str__ not required
+ return None
+ return method
+
+ assert isinstance(cls.__base__, type)
+ assert hasattr(
+ cls, "_tvm_metadata"
+ ), "Please use the user-facing method overiding class, i.e., PyRunner."
+
+ base = cls.__base__
+ metadata = getattr(base, "_tvm_metadata")
+ members = metadata.get("members", [])
+ methods = metadata.get("methods", [])
+
+ class TVMDerivedObject(metadata["cls"]): # type: ignore
+ """The derived object to avoid cyclic dependency."""
+
+ def __init__(self, *args, **kwargs):
+ """Constructor."""
+ self.handle = None
+ self._inst = cls(*args, **kwargs)
+
+ super().__init__(
+ # the constructor's parameters, builder, runner, etc.
+ *[getattr(self._inst, name) for name in members],
+ # the function methods, init_with_tune_context, build, run,
etc.
+ [_extract(self._inst, name) for name in methods],
+ )
+
+ # for task scheduler hybrid funcs in c++ & python side
+ # using weakref to avoid cyclic dependency
+ self._inst._outer = weakref.ref(self)
Review comment:
object(self.handle)
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