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https://github.com/clearml/clearml
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42 lines
937 B
Python
42 lines
937 B
Python
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"""
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Locking constants
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Lock types:
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- `LOCK_EX` exclusive lock
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- `LOCK_SH` shared lock
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Lock flags:
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- `LOCK_NB` non-blocking
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Manually unlock, only needed internally
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- `LOCK_UN` unlock
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"""
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import os
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# The actual tests will execute the code anyhow so the following code can
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# safely be ignored from the coverage tests
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if os.name == 'nt': # pragma: no cover
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import msvcrt
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LOCK_EX = 0x1 #: exclusive lock
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LOCK_SH = 0x2 #: shared lock
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LOCK_NB = 0x4 #: non-blocking
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LOCK_UN = msvcrt.LK_UNLCK #: unlock
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LOCKFILE_FAIL_IMMEDIATELY = 1
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LOCKFILE_EXCLUSIVE_LOCK = 2
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elif os.name == 'posix': # pragma: no cover
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import fcntl
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LOCK_EX = fcntl.LOCK_EX #: exclusive lock
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LOCK_SH = fcntl.LOCK_SH #: shared lock
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LOCK_NB = fcntl.LOCK_NB #: non-blocking
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LOCK_UN = fcntl.LOCK_UN #: unlock
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else: # pragma: no cover
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raise RuntimeError('PortaLocker only defined for nt and posix platforms')
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