8b27482692
See https://black.readthedocs.io/en/stable/the_black_code_style/index.html Signed-off-by: Jim Mussared <jim.mussared@gmail.com>
51 lines
1.1 KiB
Python
51 lines
1.1 KiB
Python
# test concurrent mutating access to a shared user instance
|
|
#
|
|
# SPDX-FileCopyrightText: Copyright (c) 2016 Damien P. George on behalf of Pycom Ltd
|
|
#
|
|
# SPDX-License-Identifier: MIT
|
|
|
|
import _thread
|
|
|
|
|
|
# the shared user class and instance
|
|
class User:
|
|
def __init__(self):
|
|
self.a = "A"
|
|
self.b = "B"
|
|
self.c = "C"
|
|
|
|
|
|
user = User()
|
|
|
|
|
|
# main thread function
|
|
def th(n, lo, hi):
|
|
for repeat in range(n):
|
|
for i in range(lo, hi):
|
|
setattr(user, "attr_%u" % i, repeat + i)
|
|
assert getattr(user, "attr_%u" % i) == repeat + i
|
|
|
|
with lock:
|
|
global n_finished
|
|
n_finished += 1
|
|
|
|
|
|
lock = _thread.allocate_lock()
|
|
n_repeat = 30
|
|
n_range = 50 # 300 for stressful test (uses more heap)
|
|
n_thread = 4
|
|
n_finished = 0
|
|
|
|
# spawn threads
|
|
for i in range(n_thread):
|
|
_thread.start_new_thread(th, (n_repeat, i * n_range, (i + 1) * n_range))
|
|
|
|
# busy wait for threads to finish
|
|
while n_finished < n_thread:
|
|
pass
|
|
|
|
# check user instance has correct contents
|
|
print(user.a, user.b, user.c)
|
|
for i in range(n_thread * n_range):
|
|
assert getattr(user, "attr_%u" % i) == n_repeat - 1 + i
|