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Duncan Sharppe
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Joined: 13 Dec 2013
Posts: 20
Location: USA
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Folks, hello...
I was given some very old IBM manuals. I believe they are from the mid-to-late 1970's.
Upon reading the language reference and the program guide for my very favorite language I came across some features that I believe do not exist in the current release of the program product.
That being said, I'd like to ask about EVENT variables and a little bit about multitasking. That is, there are these very COOL examples of events being used on read and write statements to launch what appears to be asynchronous reads and writes.
And, these event variables being used in a call procedure statements to what appears to be equivalence to creating sister tasks; where in the calling task continues executing in parallel to the sister task.
So, like when did these disappear from the language (or is it that I really need to learn more about the current releases of the compiler.)
Any KOO! or not-so-cool answers much, much appreciated.
friarDuncan |
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Rohit Umarjikar
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Joined: 21 Sep 2010
Posts: 3051
Location: NYC,USA
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friarDuncan,
I am not the right person to answer but I feel like below link might help you and as I got to know this EVENT valiables do not support anymore. So you check on WAIT. However, now a days BxAM access methods of OS/360 (Tape and DASD )are so buffered these days that it's generally not required and earlier with the help EVENT it was able to make asynch I/O's.
public.dhe.ibm.com/eserver/zseries/zos/vse/pdf3/PLI_multitasking-MK2.pdf |
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Duncan Sharppe
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Joined: 13 Dec 2013
Posts: 20
Location: USA
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Hello there Rohit,
Many, many thanks for the URL. I will be visiting it and obtaining whatever is there.
Pity that the EVENT variables do not exist in PL/I anymore. As I was reading these manuals my mind was rally imagining some really neat-o burrito-o I/O overlapping with in-line code.
Hehehehehe....
Now I am wondering... Call that code that was written using EVENTs not now being there; were that old code had to be rewritten???
Yow... I would love a job like that!!!
Hehehe....
Again, THANKS for the URL.
Duncan, the friar |
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Rohit Umarjikar
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Joined: 21 Sep 2010
Posts: 3051
Location: NYC,USA
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| Quote: |
| Yow... I would love a job like that!!! |
The below link would also give the better discussion on the same over the forum.
ibmmainframes.com/about45370.html
And you are most Welcome!! |
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