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68 lines
2.3 KiB
Python
68 lines
2.3 KiB
Python
# Copyright 2023 The JAX Authors.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# https://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import dataclasses
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import functools
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import io
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from typing import Any
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try:
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import cloudpickle # type: ignore[import-not-found]
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except ImportError:
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cloudpickle = None
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from jax._src import profiler
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@functools.partial(profiler.annotate_function, name='pickle_util.dumps')
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def dumps(obj: Any) -> bytes:
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"""See `pickle.dumps`. Used for serializing host callbacks in jaxlib."""
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if cloudpickle is None:
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raise ModuleNotFoundError('No module named "cloudpickle"')
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class Pickler(cloudpickle.CloudPickler):
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"""Customizes the behavior of cloudpickle."""
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# Make a copy to avoid modifying cloudpickle for other users.
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dispatch_table = cloudpickle.CloudPickler.dispatch_table.copy()
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# Fixes for dataclass internal singleton object serialization.
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# Bug: https://github.com/cloudpipe/cloudpickle/issues/386
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# pylint: disable=protected-access
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# pytype: disable=module-attr
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dispatch_table[dataclasses._FIELD_BASE] = lambda x: f'{x.name}'
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dispatch_table[dataclasses._MISSING_TYPE] = lambda _: 'MISSING'
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dispatch_table[dataclasses._HAS_DEFAULT_FACTORY_CLASS] = (
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lambda _: '_HAS_DEFAULT_FACTORY'
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)
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if hasattr(dataclasses, '_KW_ONLY_TYPE'):
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dispatch_table[dataclasses._KW_ONLY_TYPE] = (
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lambda _: '_KW_ONLY_TYPE'
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) # Added in Python 3.10.
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# pytype: enable=module-attr
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# pylint: enable=protected-access
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with io.BytesIO() as file:
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Pickler(file).dump(obj)
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return file.getvalue()
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@functools.partial(profiler.annotate_function, name='pickle_util.loads')
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def loads(data: bytes) -> Any:
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"""See `pickle.loads`."""
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if cloudpickle is None:
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raise ModuleNotFoundError('No module named "cloudpickle"')
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return cloudpickle.loads(data)
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