circuitpython/tests/thread/thread_qstr1.py

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# test concurrent interning of strings
#
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# SPDX-FileCopyrightText: Copyright (c) 2016 Damien P. George on behalf of Pycom Ltd
#
# SPDX-License-Identifier: MIT
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import time
import _thread
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# function to check the interned string
def check(s, val):
assert type(s) == str
assert int(s) == val
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# main thread function
def th(base, n):
for i in range(n):
# this will intern the string and check it
exec("check('%u', %u)" % (base + i, base + i))
with lock:
global n_finished
n_finished += 1
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lock = _thread.allocate_lock()
n_thread = 4
n_finished = 0
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n_qstr_per_thread = 100 # make 1000 for a more stressful test (uses more heap)
# spawn threads
for i in range(n_thread):
_thread.start_new_thread(th, (i * n_qstr_per_thread, n_qstr_per_thread))
# wait for threads to finish
while n_finished < n_thread:
time.sleep(1)
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print("pass")