On 21 July 2011 11:45, Shmuel Metz (Seymour J.) <shmuel+ibm-m...@patriot.net> wrote: > In <snt113-w225ae423b76930781f515c6...@phx.gbl>, on 07/20/2011 > at 07:52 PM, john gilmore <john_w_gilm...@msn.com> said: > >>Initially in an IBM mainframe environment a reentrant program could >>modify itself, usually at initial-load time, if it held a global lock >>while it did so; and this is the chief reason why a stronger term, >>refreshable in the event, was needed, introduced, and used. > > There were no locks in OS/360.
As with REENTRANT, THREADSAFE, and many other terms, LOCK can be used in the MVS-specific sense, or more generally. Speaking generally, an ENQ is a lock, as is running disabled on a uniprocessor. Tony H. ---------------------------------------------------------------------- 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
