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27 lines
612 B
Python
27 lines
612 B
Python
import fcntl
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import os
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import sys
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from pathlib import Path
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from typing import TextIO
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from dzgui.const.constants import LOCK_FILE
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from dzgui.util.strings import cannot_acquire_lock
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from dzgui.views.dialogs.early_alert import EarlyAlertDialog
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def lock_release(lock: TextIO) -> None:
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fcntl.flock(lock, fcntl.LOCK_UN)
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os.close(lock.fileno())
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def lock_acquire() -> TextIO:
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lockfile = Path(LOCK_FILE)
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lock = open(lockfile, "w")
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try:
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fcntl.flock(lock, fcntl.LOCK_EX | fcntl.LOCK_NB)
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except OSError:
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EarlyAlertDialog(cannot_acquire_lock)
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sys.exit(1)
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return lock
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