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#
# Copyright (C) 2019 Bloomberg Finance LP
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library. If not, see <http://www.gnu.org/licenses/>.
from ..sandbox import SandboxDummy
from .platform import Platform
class Win32(Platform):
def maximize_open_file_limit(self):
# Note that on Windows, we don't have the 'resource' module to help us
# configure open file limits.
#
# 'psutil' provides an rlimit implementation that is only available on
# Linux, as of version 5.3.
#
# Given that this limit is only important for SafeHardLinks FUSE, and
# we don't have FUSE on Windows, this won't be an obstacle for now.
#
# If it does turn out to be an obstacle, beware that the Windows API
# `_setmaxstdio` for increasing the open file limit only applies to the
# 'stream I/O level', i.e. `fopen()` and friends. CPython opens files
# using `_wopen()`, which is at the 'low I/O level'.
#
# You can see this in the function `os_open_impl` in `posixmodule.c` in
# CPython version 3.9.
#
# For more information:
# https://docs.microsoft.com/en-us/cpp/c-runtime-library/reference/setmaxstdio
#
pass
@staticmethod
def _check_dummy_sandbox_config(config):
return True
@staticmethod
def _create_dummy_sandbox(*args, **kwargs):
kwargs["dummy_reason"] = "There are no supported sandbox technologies for Win32 at this time."
return SandboxDummy(*args, **kwargs)
def _setup_dummy_sandbox(self):
self.check_sandbox_config = Win32._check_dummy_sandbox_config
self.create_sandbox = Win32._create_dummy_sandbox
return True
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