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# to you 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
#
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# specific language governing permissions and limitations
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# This file is called from a test in test_pandas.py.

from concurrent.futures import ThreadPoolExecutor
import faulthandler
import sys

import pyarrow as pa

num_threads = 60
timeout = 10  # seconds


def thread_func(i):
    pa.array([i]).to_pandas()


def main():
    # In case of import deadlock, crash after a finite timeout
    faulthandler.dump_traceback_later(timeout, exit=True)
    with ThreadPoolExecutor(num_threads) as pool:
        assert "pandas" not in sys.modules  # pandas is imported lazily
        list(pool.map(thread_func, range(num_threads)))
        assert "pandas" in sys.modules


if __name__ == "__main__":
    main()