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127 lines
3.1 KiB
Python
127 lines
3.1 KiB
Python
from panda3d.core import Mutex, ReMutex
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from panda3d import core
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from random import random
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import pytest
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def test_mutex_acquire_release():
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m = Mutex()
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m.acquire()
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# Assert that the lock is truly held now
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assert m.debug_is_locked()
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# Release the lock
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m.release()
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# Make sure the lock is properly released
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assert m.try_acquire()
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# Clean up
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m.release()
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def test_mutex_try_acquire():
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m = Mutex()
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# Trying to acquire the lock should succeed
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assert m.try_acquire()
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# Assert that the lock is truly held now
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assert m.debug_is_locked()
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# Clean up
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m.release()
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@pytest.mark.skipif(not core.Thread.is_threading_supported(),
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reason="Threading support disabled")
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def test_mutex_contention():
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# As a smoke test for mutexes, we just spawn a bunch of threads that do a
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# lot of mutexing and hope that we can catch any obvious issues with the
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# mutex implementation, especially when compiling with DEBUG_THREADS.
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m1 = Mutex()
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m2 = Mutex()
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m3 = Mutex()
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m4 = Mutex()
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def thread_acq_rel(m):
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for i in range(5000):
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m.acquire()
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m.release()
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def thread_nested():
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for i in range(5000):
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m1.acquire()
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m4.acquire()
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m4.release()
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m1.release()
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def thread_hand_over_hand():
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m1.acquire()
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for i in range(5000):
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m2.acquire()
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m1.release()
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m3.acquire()
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m2.release()
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m1.acquire()
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m3.release()
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m1.release()
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def thread_sleep(m):
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for i in range(250):
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m.acquire()
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core.Thread.sleep(random() * 0.003)
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m.release()
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threads = [
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core.PythonThread(thread_acq_rel, (m1,), "", ""),
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core.PythonThread(thread_acq_rel, (m2,), "", ""),
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core.PythonThread(thread_acq_rel, (m3,), "", ""),
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core.PythonThread(thread_acq_rel, (m4,), "", ""),
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core.PythonThread(thread_nested, (), "", ""),
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core.PythonThread(thread_nested, (), "", ""),
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core.PythonThread(thread_nested, (), "", ""),
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core.PythonThread(thread_hand_over_hand, (), "", ""),
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core.PythonThread(thread_hand_over_hand, (), "", ""),
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core.PythonThread(thread_sleep, (m1,), "", ""),
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core.PythonThread(thread_sleep, (m2,), "", ""),
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core.PythonThread(thread_sleep, (m3,), "", ""),
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core.PythonThread(thread_sleep, (m4,), "", ""),
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]
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for thread in threads:
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thread.start(core.TP_normal, True)
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for thread in threads:
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thread.join()
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def test_remutex_acquire_release():
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m = ReMutex()
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m.acquire()
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m.acquire()
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m.release()
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m.release()
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def test_remutex_try_acquire():
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m = ReMutex()
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# Trying to acquire the lock should succeed
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assert m.try_acquire()
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# Should report being locked
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assert m.debug_is_locked()
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# Trying a second time should succeed
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assert m.try_acquire()
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# Should still report being locked
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assert m.debug_is_locked()
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# Clean up
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m.release()
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m.release()
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