49 lines
962 B
Python
49 lines
962 B
Python
# test _thread lock object using a single thread
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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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# create lock
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lock = _thread.allocate_lock()
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print(type(lock) == _thread.LockType)
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# should be unlocked
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print(lock.locked())
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# basic acquire and release
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print(lock.acquire())
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print(lock.locked())
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lock.release()
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print(lock.locked())
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# try acquire twice (second should fail)
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print(lock.acquire())
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print(lock.locked())
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print(lock.acquire(0))
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print(lock.locked())
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lock.release()
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print(lock.locked())
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# test with capabilities of lock
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with lock:
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print(lock.locked())
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# test that lock is unlocked if an error is raised
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try:
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with lock:
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print(lock.locked())
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raise KeyError
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except KeyError:
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print("KeyError")
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print(lock.locked())
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# test that we can't release an unlocked lock
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try:
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lock.release()
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except RuntimeError:
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print("RuntimeError")
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