didericis-codex
3bc618c264
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31 lines
721 B
Python
31 lines
721 B
Python
"""Serialize Firecracker run-directory creation with orphan cleanup."""
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from __future__ import annotations
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import fcntl
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from contextlib import contextmanager
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from pathlib import Path
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from typing import Generator
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from . import util
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def _lock_path() -> Path:
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return util.cache_dir() / "run.lifecycle.lock"
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@contextmanager
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def hold() -> Generator[None]:
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"""Exclude cleanup while a launch directory lacks a visible VMM."""
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path = _lock_path()
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path.parent.mkdir(parents=True, exist_ok=True)
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with path.open("a", encoding="utf-8") as handle:
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fcntl.flock(handle, fcntl.LOCK_EX)
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try:
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yield
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finally:
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fcntl.flock(handle, fcntl.LOCK_UN)
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__all__ = ["hold"]
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