Created
July 1, 2021 23:35
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Python lock test
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| import threading | |
| from contextlib import contextmanager | |
| import time | |
| from concurrent.futures import ThreadPoolExecutor | |
| @contextmanager | |
| def acquire_timeout(lock, timeout): | |
| result = lock.acquire(timeout=timeout) | |
| yield result | |
| if result: | |
| lock.release() | |
| # Usage: | |
| lock = threading.Lock() | |
| def _func(to): | |
| with acquire_timeout(lock, to) as acquired: | |
| if acquired: | |
| print('got the lock') | |
| time.sleep(to) | |
| # do something .... | |
| else: | |
| print('timeout: lock not available') | |
| # do something else ... | |
| with ThreadPoolExecutor(max_workers=8) as executor: | |
| print("thread loop............") | |
| executor.submit(_func, 7) | |
| executor.submit(_func, 1) | |
| executor.submit(_func, 6) |
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