8470cd0be9
And add a test that shows how this can happen when multiple threads are accessing the scheduler, which fails if atomic sections are not used.
50 lines
991 B
Python
50 lines
991 B
Python
# This test ensures that the scheduler doesn't trigger any assertions
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# while dealing with concurrent access from multiple threads.
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import _thread
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import utime
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import micropython
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import gc
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try:
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micropython.schedule
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except AttributeError:
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print("SKIP")
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raise SystemExit
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gc.disable()
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n = 0 # How many times the task successfully ran.
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def task(x):
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global n
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n += 1
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def thread():
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while True:
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try:
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micropython.schedule(task, None)
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except RuntimeError:
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# Queue full, back off.
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utime.sleep_ms(10)
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for i in range(8):
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_thread.start_new_thread(thread, ())
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_NUM_TASKS = const(10000)
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_TIMEOUT_MS = const(10000)
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# Wait up to 10 seconds for 10000 tasks to be scheduled.
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t = utime.ticks_ms()
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while n < _NUM_TASKS and utime.ticks_diff(utime.ticks_ms(), t) < _TIMEOUT_MS:
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pass
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if n < _NUM_TASKS:
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# Not all the tasks were scheduled, likely the scheduler stopped working.
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print(n)
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else:
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print("PASS")
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