On Tue, Feb 23, 2010 at 12:07 PM, Don Poitras <poit...@pobox.com> wrote:
> In article <4b8389b7.9030...@gmail.com> you wrote: > > Charles Mills wrote: > > > > > > The fundamental problem I guess is that any solution that keeps a > pointer > > > around "somewhere in the code" is fundamentally not reentrant, unless I > can > > > figure out how to utilize pseudo-registers. I've heard the term > > > pseudo-register for years but I have never delved into them. Perhaps > now is > > > the time. > > > > > > > > > You're fundamentally not reentrant if you use any kind of global data. > > That may be name/tokens, control > > block anchors or WSA. That may not be a problem for you if you only want > > one instance of the routine. > > I prefer to design C++ applications to use objects which can handle > > multiple instantiations of the same > > class even if I only need one instance. You never know when that > > requirement may change. > > The purpose of WSA is to provide reentrancy. Every copy of the program > will get it's own WSA initialised when the program starts. No different > than in assembler where you do a GETMAIN and use MF=L macros. > This really depends on how you get access to the program with the WSA. If you load a program once and put the address in commonly retrievable area (vector table, name/token pair, etc.) then WSA does not provide reentrancy. > > > > RELATED: is anyone using void *__malloc24(size_t size);? If you code it > then > > > it does not compile; if you code your own declaration then it does not > link. > > > At least not in my code. Yes, I included <stdlib.h>. Obviously, not a > big > > > deal to write an assembler GETMAIN routine, but still ... > > > > > > Charles > > -- > Don Poitras - SAS Development - SAS Institute Inc. - SAS Campus Drive > sas...@sas.com (919) 531-5637 Cary, NC 27513 > > ---------------------------------------------------------------------- > 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 > ---------------------------------------------------------------------- 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
