backend_tests.py 文件源码

def test_init_once_multithread(self):
        import sys, time
        if sys.version_info < (3,):
            import thread
        else:
            import _thread as thread
        #
        def do_init():
            seen.append('init!')
            time.sleep(1)
            seen.append('init done')
            return 7
        ffi = FFI()
        seen = []
        for i in range(6):
            def f():
                res = ffi.init_once(do_init, "tag")
                seen.append(res)
            thread.start_new_thread(f, ())
        time.sleep(1.5)
        assert seen == ['init!', 'init done'] + 6 * [7]