38 lines
759 B
Python
38 lines
759 B
Python
# test capability for threads to access a shared mutable data structure
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# (without contention because they access different parts of the structure)
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#
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# SPDX-FileCopyrightText: Copyright (c) 2016 Damien P. George on behalf of Pycom Ltd
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#
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# SPDX-License-Identifier: MIT
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import _thread
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def foo(lst, i):
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lst[i] += 1
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def thread_entry(n, lst, idx):
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for i in range(n):
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foo(lst, idx)
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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 = 2
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n_finished = 0
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# the shared data structure
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lst = [0, 0]
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# spawn threads
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for i in range(n_thread):
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_thread.start_new_thread(thread_entry, ((i + 1) * 10, lst, i))
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# busy wait for threads to finish
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while n_finished < n_thread:
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pass
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print(lst)
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