45 lines
1.6 KiB
Python
45 lines
1.6 KiB
Python
# Copyright 2019 The TensorFlow Authors. All Rights Reserved.
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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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# http://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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# ==============================================================================
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"""Cancellation support for eager execution."""
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from __future__ import absolute_import
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from __future__ import division
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from __future__ import print_function
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from tensorflow.python import pywrap_tfe
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class CancellationManager(object):
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"""A mechanism for cancelling blocking computation."""
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def __init__(self):
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self._impl = pywrap_tfe.TFE_NewCancellationManager()
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@property
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def is_cancelled(self):
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"""Returns `True` if `CancellationManager.start_cancel` has been called."""
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return pywrap_tfe.TFE_CancellationManagerIsCancelled(self._impl)
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def start_cancel(self):
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"""Cancels blocking operations that have been registered with this object."""
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pywrap_tfe.TFE_CancellationManagerStartCancel(self._impl)
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def get_cancelable_function(self, concrete_function):
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# pylint: disable=protected-access
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return concrete_function._experimental_with_cancellation_manager(self)
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def __del__(self):
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pywrap_tfe.TFE_DeleteCancellationManager(self._impl)
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