BPX4CCA (cond_cancel) example

The following code demonstrates how to cancel a program's interest in events that were selected by a call to the cond_setup service. For the callable service, see cond_cancel (BPX1CCA, BPX4CCA) — Cancel interest in events. AMODE 31 callers use BPXICCA (cond_cancel) example.

                                              
         CALL  BPX4CCA,              Cancel cond_setup                 +
               (RETVAL,              Return value: 0 or -1             +
               RETCODE,              Return code                       +
               RSNCODE),             Reason code                       +
               MF=(E,PLIST)          ---------------------------------- 
*  The return value (RETVAL) does not matter.  When your program        
*  receives control following the call to cond_cancel, it is no         
*  longer eligible to receive event notifications via cond_post.