31 lines
968 B
Python
31 lines
968 B
Python
#!/usr/bin/python
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# Copyright (c) 2015 Hewlett-Packard Development Company, L.P.
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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
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# 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 fcntl
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class Lock(object):
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def __init__(self, filename):
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self.filename = filename
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def __enter__(self):
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fh = open(self.filename, 'w')
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fcntl.flock(fh, fcntl.LOCK_EX)
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def __exit__(self, exc_type, exc_value, traceback):
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fh = open(self.filename, 'w')
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fcntl.flock(fh, fcntl.LOCK_UN)
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