| # SPDX-license-identifier: Apache-2.0 |
| # Copyright 2012-2021 The Meson development team |
| # Copyright © 2021 Intel Corporation |
| |
| # Licensed under the Apache License, Version 2.0 (the "License"); |
| # you may not use this file except in compliance with the License. |
| # You may obtain a copy of the License at |
| |
| # http://www.apache.org/licenses/LICENSE-2.0 |
| |
| # Unless required by applicable law or agreed to in writing, software |
| # distributed under the License is distributed on an "AS IS" BASIS, |
| # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| # See the License for the specific language governing permissions and |
| # limitations under the License. |
| from __future__ import annotations |
| |
| """Windows specific implementations of mesonlib functionality.""" |
| |
| import msvcrt |
| import typing as T |
| |
| from .core import MesonException |
| from .platform import BuildDirLock as BuildDirLockBase |
| |
| __all__ = ['BuildDirLock'] |
| |
| class BuildDirLock(BuildDirLockBase): |
| |
| def __enter__(self) -> None: |
| self.lockfile = open(self.lockfilename, 'w', encoding='utf-8') |
| try: |
| msvcrt.locking(self.lockfile.fileno(), msvcrt.LK_NBLCK, 1) |
| except (BlockingIOError, PermissionError): |
| self.lockfile.close() |
| raise MesonException('Some other Meson process is already using this build directory. Exiting.') |
| |
| def __exit__(self, *args: T.Any) -> None: |
| msvcrt.locking(self.lockfile.fileno(), msvcrt.LK_UNLCK, 1) |
| self.lockfile.close() |
