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# SPDX-License-Identifier: Apache-2.0
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# Copyright 2012-2021 The Meson development team
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# Copyright © 2021-2023 Intel Corporation
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from __future__ import annotations
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"""Windows specific implementations of mesonlib functionality."""
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import msvcrt
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import typing as T
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from .core import MesonException
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from .platform import BuildDirLock as BuildDirLockBase
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__all__ = ['BuildDirLock']
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class BuildDirLock(BuildDirLockBase):
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def __enter__(self) -> None:
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self.lockfile = open(self.lockfilename, 'w', encoding='utf-8')
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try:
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msvcrt.locking(self.lockfile.fileno(), msvcrt.LK_NBLCK, 1)
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except (BlockingIOError, PermissionError):
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self.lockfile.close()
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raise MesonException('Some other Meson process is already using this build directory. Exiting.')
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def __exit__(self, *args: T.Any) -> None:
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msvcrt.locking(self.lockfile.fileno(), msvcrt.LK_UNLCK, 1)
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self.lockfile.close()
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