On Sun, 21 Feb 2010 18:00:19 -0800 Charles Mills <charl...@mcn.org> wrote:
:>I'm writing a fairly large MVS batch application in C++. At several points :>it is necessary to call "library" type routines that I am writing in :>assembler. Several of the routines (unfortunately) need to use QSAM macros :>and so need below-the-line storage. :>Obviously I could do a GETMAIN or STORAGE OBTAIN LOC=24 on the way in and :>FREEMAIN or STORAGE RELEASE on the way out. But that's less than optimal for :>a routine that is called multiple times. (And it would not work at all if :>the routine had to save state across calls, but fortunately that is not the :>case, at least for my requirements so far.) :>I could make the calling C++ responsible for providing a "work area" :>obtained with _malloc24(). But I don't like that for "aesthetic" reasons - :>violates encapsulation, making the caller responsible for the inner workings :>of the called function. :>Is there a better way? Is there some sort of "anchor word" where a library :>of called assembler routines could save an address across calls? Is this :>what CEECAA_TCASRV_USERWORD in CEECAA is for? Does R12 reliably point to the :>CEECAA on entry? Can I count on CEECAA_TCASRV_USERWORD being initialized to :>zero? Where is this stuff documented? I don't see much in LE Programming, in :>LE ILC, or in the C/C++ Programming Guide. :>Is there some "LE-supported" solution to the whole problem, such as a "below :>the line stack" feature that an individual function (but not the whole :>application!) could utilize? You can anchor in name/token. -- Binyamin Dissen <bdis...@dissensoftware.com> http://www.dissensoftware.com Director, Dissen Software, Bar & Grill - Israel Should you use the mailblocks package and expect a response from me, you should preauthorize the dissensoftware.com domain. I very rarely bother responding to challenge/response systems, especially those from irresponsible companies. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
