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2739a7c599
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/44879 Test Plan: Imported from OSS Reviewed By: ezyang Differential Revision: D23825163 Pulled By: bdhirsh fbshipit-source-id: 4d8028274f82c401b393c4fe1b9e32de3f4909c6
41 lines
1.6 KiB
Python
41 lines
1.6 KiB
Python
import threading
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from contextlib import contextmanager
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from typing import Optional, Iterator
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from tools.codegen.model import UseC10Dispatcher
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# Simple dynamic scoping implementation. The name "parametrize" comes
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# from Racket.
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#
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# WARNING WARNING: LOOKING TO EDIT THIS FILE? Think carefully about
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# why you need to add a toggle to the global behavior of code
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# generation. The parameters here should really only be used
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# for "temporary" situations, where we need to temporarily change
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# the codegen in some cases because we cannot conveniently update
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# all call sites, and are slated to be eliminated once all call
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# sites are eliminated. If you don't have a plan for how to get there,
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# DON'T add a new entry here.
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class Locals(threading.local):
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use_c10_dispatcher: Optional[UseC10Dispatcher] = None
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_locals = Locals()
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# The use_c10_dispatcher field in native_functions.yaml is used to
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# control codegen behavior, so that we can handle cases where
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# Dispatcher templating logic can't handle. In the terminal
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# state, use_c10_dispatcher should always be UseC10Dispatcher.full
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# and this flag can be eliminated.
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def use_c10_dispatcher() -> UseC10Dispatcher:
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assert _locals.use_c10_dispatcher is not None, \
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"need to initialize local.use_c10_dispatcher with local.parametrize"
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return _locals.use_c10_dispatcher
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@contextmanager
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def parametrize(*, use_c10_dispatcher: UseC10Dispatcher) -> Iterator[None]:
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old_use_c10_dispatcher = _locals.use_c10_dispatcher
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try:
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_locals.use_c10_dispatcher = use_c10_dispatcher
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yield
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finally:
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_locals.use_c10_dispatcher = old_use_c10_dispatcher
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