| Rev | Line | |
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| [976] | 1 | ###
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| 2 | ### backmon.lib.locking
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| 3 | ###
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| 4 | import os
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| 5 | import os.path
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| 6 | import time
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| 7 |
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| 8 | from .exceptions import BackmonError
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| 9 |
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| 10 | #
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| 11 | # lock() - Lock a file using lock directory semantics
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| 12 | #
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| 13 | def lock(path, retries=1, sleep=1):
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| 14 |
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| 15 | lock_dir = '%s.lock' % (path)
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| 16 |
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| 17 | for i in range(retries):
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| 18 | try:
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| 19 | os.mkdir(lock_dir)
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| 20 | return True
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| 21 | except OSError:
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| 22 | time.sleep(sleep)
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| 23 |
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| 24 | return False
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| 25 |
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| 26 |
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| 27 | #
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| 28 | # unlock() - Unlock a file using lock directory semantics
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| 29 | #
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| 30 | def unlock(path, retries=1, sleep=1):
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| 31 |
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| 32 | lock_dir = '%s.lock' % (path)
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| 33 |
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| 34 | for i in range(retries):
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| 35 | try:
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| 36 | os.rmdir(lock_dir)
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| 37 | return True
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| 38 | except OSError:
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| 39 | time.sleep(sleep)
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| 40 |
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| 41 | return False
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| 42 |
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