A.When you explicitly callreturn in a method (even at the end).
a当你在方法里显式调用return的时候(即使是在最后)。
2
The first way is to install a signal handler for the SIGBUS signal, and then simply callreturn in the handler.
第一种方式是为SIGBUS信号设置信号处理程序，并在处理程序中简单的执行return语句。
3
To allow for added arguments beyond those defined in the parameter array (either required values or variable length sets of values), I'll have the callreturn the actual number of arguments processed.