Is it safe to call getProcessExitCode more than once?

[Peter Simons]

Glynn Clements writes:

 > Both [waitForProcess and getProcessExitCode] will throw
 > an exception if the process terminated on a signal.

So if I terminate a process manually, I'll have to wait for
the ExitCode to avoid a zombie process, and waiting for the
ExitCode invariably throws an exception.

Or do I misunderstand something?

Peter