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# (c) 2016 - Red Hat, Inc. <info@ansible.com>
#
# This file is part of Ansible
#
# Ansible is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Ansible 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Ansible. If not, see <http://www.gnu.org/licenses/>.
# Make coding more python3-ish
from __future__ import (absolute_import, division, print_function)
__metaclass__ = type
import multiprocessing.synchronize
from multiprocessing import Lock
from ansible.module_utils.facts.system.pkg_mgr import PKG_MGRS
if 'action_write_locks' not in globals():
# Do not initialize this more than once because it seems to bash
# the existing one. multiprocessing must be reloading the module
# when it forks?
action_write_locks = dict() # type: dict[str | None, multiprocessing.synchronize.Lock]
# Below is a Lock for use when we weren't expecting a named module. It gets used when an action
# plugin invokes a module whose name does not match with the action's name. Slightly less
# efficient as all processes with unexpected module names will wait on this lock
action_write_locks[None] = Lock()
# These plugins are known to be called directly by action plugins with names differing from the
# action plugin name. We precreate them here as an optimization.
# If a list of service managers is created in the future we can do the same for them.
mods = set(p['name'] for p in PKG_MGRS)
mods.update(('copy', 'file', 'setup', 'slurp', 'stat'))
for mod_name in mods:
action_write_locks[mod_name] = Lock()
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