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# test concurrent interning of strings
#
# MIT license; Copyright (c) 2016 Damien P. George on behalf of Pycom Ltd
import time
import _thread
# function to check the interned string
def check(s, val):
assert type(s) == str
assert int(s) == val
# 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
lock = _thread.allocate_lock()
n_thread = 0
n_thread_max = 4
n_finished = 0
n_qstr_per_thread = 100 # make 1000 for a more stressful test (uses more heap)
# spawn threads
for _ in range(n_thread_max):
try:
_thread.start_new_thread(th, (n_thread * n_qstr_per_thread, n_qstr_per_thread))
n_thread += 1
except OSError:
# System cannot create a new thead, so stop trying to create them.
break
# also run the function on this main thread
th(n_thread * n_qstr_per_thread, n_qstr_per_thread)
n_thread += 1
# wait for threads to finish
while n_finished < n_thread:
time.sleep(0)
print("pass")
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