diff -r 000000000000 -r ae805ac0140d python-2.5.2/win32/Lib/test/test_threading.py --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/python-2.5.2/win32/Lib/test/test_threading.py Fri Apr 03 17:19:34 2009 +0100 @@ -0,0 +1,227 @@ +# Very rudimentary test of threading module + +import test.test_support +from test.test_support import verbose +import random +import sys +import threading +import thread +import time +import unittest + +# A trivial mutable counter. +class Counter(object): + def __init__(self): + self.value = 0 + def inc(self): + self.value += 1 + def dec(self): + self.value -= 1 + def get(self): + return self.value + +class TestThread(threading.Thread): + def __init__(self, name, testcase, sema, mutex, nrunning): + threading.Thread.__init__(self, name=name) + self.testcase = testcase + self.sema = sema + self.mutex = mutex + self.nrunning = nrunning + + def run(self): + delay = random.random() * 2 + if verbose: + print 'task', self.getName(), 'will run for', delay, 'sec' + + self.sema.acquire() + + self.mutex.acquire() + self.nrunning.inc() + if verbose: + print self.nrunning.get(), 'tasks are running' + self.testcase.assert_(self.nrunning.get() <= 3) + self.mutex.release() + + time.sleep(delay) + if verbose: + print 'task', self.getName(), 'done' + + self.mutex.acquire() + self.nrunning.dec() + self.testcase.assert_(self.nrunning.get() >= 0) + if verbose: + print self.getName(), 'is finished.', self.nrunning.get(), \ + 'tasks are running' + self.mutex.release() + + self.sema.release() + +class ThreadTests(unittest.TestCase): + + # Create a bunch of threads, let each do some work, wait until all are + # done. + def test_various_ops(self): + # This takes about n/3 seconds to run (about n/3 clumps of tasks, + # times about 1 second per clump). + NUMTASKS = 10 + + # no more than 3 of the 10 can run at once + sema = threading.BoundedSemaphore(value=3) + mutex = threading.RLock() + numrunning = Counter() + + threads = [] + + for i in range(NUMTASKS): + t = TestThread(""%i, self, sema, mutex, numrunning) + threads.append(t) + t.start() + + if verbose: + print 'waiting for all tasks to complete' + for t in threads: + t.join(NUMTASKS) + self.assert_(not t.isAlive()) + if verbose: + print 'all tasks done' + self.assertEqual(numrunning.get(), 0) + + # run with a small(ish) thread stack size (256kB) + def test_various_ops_small_stack(self): + if verbose: + print 'with 256kB thread stack size...' + try: + threading.stack_size(262144) + except thread.error: + if verbose: + print 'platform does not support changing thread stack size' + return + self.test_various_ops() + threading.stack_size(0) + + # run with a large thread stack size (1MB) + def test_various_ops_large_stack(self): + if verbose: + print 'with 1MB thread stack size...' + try: + threading.stack_size(0x100000) + except thread.error: + if verbose: + print 'platform does not support changing thread stack size' + return + self.test_various_ops() + threading.stack_size(0) + + def test_foreign_thread(self): + # Check that a "foreign" thread can use the threading module. + def f(mutex): + # Acquiring an RLock forces an entry for the foreign + # thread to get made in the threading._active map. + r = threading.RLock() + r.acquire() + r.release() + mutex.release() + + mutex = threading.Lock() + mutex.acquire() + tid = thread.start_new_thread(f, (mutex,)) + # Wait for the thread to finish. + mutex.acquire() + self.assert_(tid in threading._active) + self.assert_(isinstance(threading._active[tid], + threading._DummyThread)) + del threading._active[tid] + + # PyThreadState_SetAsyncExc() is a CPython-only gimmick, not (currently) + # exposed at the Python level. This test relies on ctypes to get at it. + def test_PyThreadState_SetAsyncExc(self): + try: + import ctypes + except ImportError: + if verbose: + print "test_PyThreadState_SetAsyncExc can't import ctypes" + return # can't do anything + + set_async_exc = ctypes.pythonapi.PyThreadState_SetAsyncExc + + class AsyncExc(Exception): + pass + + exception = ctypes.py_object(AsyncExc) + + # `worker_started` is set by the thread when it's inside a try/except + # block waiting to catch the asynchronously set AsyncExc exception. + # `worker_saw_exception` is set by the thread upon catching that + # exception. + worker_started = threading.Event() + worker_saw_exception = threading.Event() + + class Worker(threading.Thread): + def run(self): + self.id = thread.get_ident() + self.finished = False + + try: + while True: + worker_started.set() + time.sleep(0.1) + except AsyncExc: + self.finished = True + worker_saw_exception.set() + + t = Worker() + t.setDaemon(True) # so if this fails, we don't hang Python at shutdown + t.start() + if verbose: + print " started worker thread" + + # Try a thread id that doesn't make sense. + if verbose: + print " trying nonsensical thread id" + result = set_async_exc(ctypes.c_long(-1), exception) + self.assertEqual(result, 0) # no thread states modified + + # Now raise an exception in the worker thread. + if verbose: + print " waiting for worker thread to get started" + worker_started.wait() + if verbose: + print " verifying worker hasn't exited" + self.assert_(not t.finished) + if verbose: + print " attempting to raise asynch exception in worker" + result = set_async_exc(ctypes.c_long(t.id), exception) + self.assertEqual(result, 1) # one thread state modified + if verbose: + print " waiting for worker to say it caught the exception" + worker_saw_exception.wait(timeout=10) + self.assert_(t.finished) + if verbose: + print " all OK -- joining worker" + if t.finished: + t.join() + # else the thread is still running, and we have no way to kill it + + def test_enumerate_after_join(self): + # Try hard to trigger #1703448: a thread is still returned in + # threading.enumerate() after it has been join()ed. + enum = threading.enumerate + old_interval = sys.getcheckinterval() + sys.setcheckinterval(1) + try: + for i in xrange(1, 1000): + t = threading.Thread(target=lambda: None) + t.start() + t.join() + l = enum() + self.assertFalse(t in l, + "#1703448 triggered after %d trials: %s" % (i, l)) + finally: + sys.setcheckinterval(old_interval) + + +def test_main(): + test.test_support.run_unittest(ThreadTests) + +if __name__ == "__main__": + test_main()