about xctl & link

narasimharao_koganti · New User Joined: 26 Apr 2005 Posts: 11 Location: pune

Hi,
I had been aksed this questions in EDS, A------>B------->C----->A.
A calls B through Link, and B calls C through Link, and C calls A through XCTL and i used goto. Where will be the control after execution of A, called by C.

priya · Posted: Sat May 21, 2005 10:53 pm

A
-
-
-
B
-
-
C - - - A

So it goes to B.

senthilkumar selvaraju · New User Joined: 30 May 2005 Posts: 16

not sure it will goes to program B.

kanak · Moderator Joined: 12 Mar 2005 Posts: 252 Location: India

hi senthilkumar selvaraju,

it will go to program B as when a program is called thru XCTL then when retun command is issued it goes to one level hiher.

In the flow given by priya is correct as XCTL calls at same level where as link one level down. If return was issued from C for the same call style then also it would have gone to B.

jkbytes · Posted: Tue May 31, 2005 12:14 pm

Dear Mr.Narasimharao,

Since LINK command transfers control from the original program to another program at one logical level lower than the current so it expects the control to be returned to the originating program upon the sucessful execution of the return command.

XCTL transfers program control from one application to another at the same logical level. so as priya wrote