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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/>.
import psutil
import pytest
from buildstream import utils
# Catch tests that don't shut down background threads, which could then lead
# to other tests hanging when BuildStream uses fork().
@pytest.fixture(autouse=True)
def thread_check():
# xdist/execnet has its own helper thread.
# Ignore that for `utils._is_single_threaded` checks.
utils._INITIAL_NUM_THREADS_IN_MAIN_PROCESS = psutil.Process().num_threads()
yield
assert utils._is_single_threaded()
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