b070765427
The native emitter will not release/bounce the GIL when running code, so if it runs tight loops then no other threads get a chance to run (if the GIL is enabled). So for the thread tests, explicitly include a call to `time.sleep(0)` (or equivalent) to bounce the GIL and give other threads a chance to run. For some tests (eg `thread_coop.py`) the whole point of the test is to test that the GIL is correctly bounced. So for those cases force the use of the bytecode emitter for the busy functions. Signed-off-by: Damien George <damien@micropython.org>
45 lines
874 B
Python
45 lines
874 B
Python
# test capability for threads to access a shared immutable data structure
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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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import time
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import _thread
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def foo(i):
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pass
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def thread_entry(n, tup):
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for i in tup:
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foo(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 = 0
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n_thread_max = 2
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n_finished = 0
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# the shared data structure
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tup = (1, 2, 3, 4)
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# spawn threads
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for _ in range(n_thread_max):
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try:
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_thread.start_new_thread(thread_entry, (100, tup))
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n_thread += 1
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except OSError:
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# System cannot create a new thead, so stop trying to create them.
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break
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# also run the function on this main thread
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thread_entry(100, tup)
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n_thread += 1
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# busy wait for threads to finish
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while n_finished < n_thread:
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time.sleep(0)
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print(tup)
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