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//usr/lib/python2.4/test/test_imp.py
import imp from test.test_support import TestFailed, TestSkipped try: import thread except ImportError: raise TestSkipped("test only valid when thread support is available") def verify_lock_state(expected): if imp.lock_held() != expected: raise TestFailed("expected imp.lock_held() to be %r" % expected) def testLock(): LOOPS = 50 # The import lock may already be held, e.g. if the test suite is run # via "import test.autotest". lock_held_at_start = imp.lock_held() verify_lock_state(lock_held_at_start) for i in range(LOOPS): imp.acquire_lock() verify_lock_state(True) for i in range(LOOPS): imp.release_lock() # The original state should be restored now. verify_lock_state(lock_held_at_start) if not lock_held_at_start: try: imp.release_lock() except RuntimeError: pass else: raise TestFailed("release_lock() without lock should raise " "RuntimeError") def test_main(): testLock() if __name__ == "__main__": test_main()