Method fork_thread

Lib/test/test_thread.py:232–246

(read_fd, write_fd)

        pid = None

        def fork_thread(read_fd, write_fd):
            nonlocal pid

            # fork in a thread
            pid = os.fork()
            if pid:
                # parent process
                return

            # child process
            try:
                os.close(read_fd)
                os.write(write_fd, b"OK")
            finally:
                os._exit(0)

        with threading_helper.wait_threads_exit():
            thread.start_new_thread(fork_thread, (self.read_fd, self.write_fd))