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Depending on the thread scheduler, a busy-wait loop can hog the CPU and make the tests very slow. So convert such loops to loops that have an explicit sleep, allowing the worker threads to do their job.
40 lines
895 B
Python
40 lines
895 B
Python
# test concurrent interning of strings
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#
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# MIT license; Copyright (c) 2016 Damien P. George on behalf of Pycom Ltd
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try:
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import utime as time
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except ImportError:
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import time
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import _thread
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# function to check the interned string
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def check(s, val):
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assert type(s) == str
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assert int(s) == val
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# main thread function
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def th(base, n):
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for i in range(n):
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# this will intern the string and check it
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exec("check('%u', %u)" % (base + i, base + i))
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with lock:
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global n_finished
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n_finished += 1
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lock = _thread.allocate_lock()
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n_thread = 4
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n_finished = 0
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n_qstr_per_thread = 100 # make 1000 for a more stressful test (uses more heap)
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# spawn threads
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for i in range(n_thread):
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_thread.start_new_thread(th, (i * n_qstr_per_thread, n_qstr_per_thread))
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# wait for threads to finish
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while n_finished < n_thread:
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time.sleep(1)
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print('pass')
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