Colin P wrote <snip> char *pJBNI; char *pJBNS; pJBNI = (char*)*(long*)(plASCB+ASCBJBNI); // for jobs pJBNS = (char*)*(long*)(plASCB+ASCBJBNS); // for started tasks #define ASCBJBNI 172L #define ASCBJBNS 176L
One or the other will be zero </snip> The last line is not true as written. For example, within an initiator when a job is running, neither is zero. If you're writing product code be aware that as an address space terminates the storage pointed to by ASCBJBNS / ASCBJBNI (which is within a CSCB mapped by IEECHAIN, hence the references to CHTRKID in other posts) gets freemained so that you might have to be prepared to blow up if using the pointer to look (if it's "your" ASCB, no problem). You might instead consider ASSBJBNS / ASSBJBNI which are not pointers, rather are the 8-byte values themselves (or x'00' in the first byte indicating not available), since you can serialize against that storage being freed by having the CPU lock, then verifying that the ASCB is valid via LOCASCSB, and checking that ASCBFAIL is not on. If all is fine, then the ASCB/ASSB cannot be freed until you release the CPU lock. Peter Relson z/OS Core Technology Design ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
