1#!/usr/bin/env python2.7
2
3# Copyright 2019, VIXL authors
4# All rights reserved.
5#
6# Redistribution and use in source and binary forms, with or without
7# modification, are permitted provided that the following conditions are met:
8#
9#   * Redistributions of source code must retain the above copyright notice,
10#     this list of conditions and the following disclaimer.
11#   * Redistributions in binary form must reproduce the above copyright notice,
12#     this list of conditions and the following disclaimer in the documentation
13#     and/or other materials provided with the distribution.
14#   * Neither the name of ARM Limited nor the names of its contributors may be
15#     used to endorse or promote products derived from this software without
16#     specific prior written permission.
17#
18# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS CONTRIBUTORS "AS IS" AND
19# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
20# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
21# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
22# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
24# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
25# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
26# OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28
29import multiprocessing
30import signal
31import sys
32
33# Catch SIGINT to gracefully exit when ctrl+C is pressed.
34def SigIntHandler(signal, frame):
35  sys.exit(1)
36
37signal.signal(signal.SIGINT, SigIntHandler)
38
39# This function can't run in parallel due to constraints from the
40# multiprocessing module.
41__run_tests_lock__ = multiprocessing.Lock()
42def Multithread(function, list_of_args, num_threads=1, init_function=None):
43  with __run_tests_lock__:
44    if init_function:
45      if not init_function():
46        # Init failed: early exit
47        return
48
49    pool = multiprocessing.Pool(num_threads)
50    # The '.get(9999999)' is a workaround to allow killing the test script with
51    # ctrl+C from the shell. This bug is documented at
52    # http://bugs.python.org/issue8296.
53    pool.map_async(function, list_of_args).get(9999999)
54    pool.close()
55    pool.join()
56