>> The usual C malloc() keeps track of allocated memory with data just >> before each allocated block.
>> As well as I understand it, GETMAIN works similarly. (snip) >> I believe that there have been some improvements along the way, but >> don't know about them. > At least since MVS/XA (circa 1982), VSM control information is kept in > cell pool extents located in ELSQA. In the OS/VS2 days, I had the manuals describing the way OS/360 does things like GETMAIN. Back when you could almost understand them without a lot of studying. -- glen ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN