VAX Ada: Diffs in tasking between v 1.5 and v 2.1?

VAX Ada: Diffs in tasking between v 1.5 and v 2.1?

[europa.asd.contel.com!darwin.sura.net!Sirius.dfn.de!th-ilmenau.RZ.TH-Ilme]

I have a prog which uses lots of tasks doing text_io.put/get on
the terminal and on files and also reading and writing system mailboxes.
The latter is implemented with QIO and AST entries.

The whole thing works fine when compiled with v 1.5, but stumbles with v 2.1.
(It seems the keyboard wait for text_io.get blocks other tasks as well.)

I'd like to know some cure for this.. 

Re: VAX Ada: Diffs in tasking between v 1.5 and v 2.1?

[pa.dec.com!nntpd2.cxo.dec.com!bonmot!wallace]

mwj@rz.uni-jena.de (Johannes Waldmann) writes:
: I have a prog which uses lots of tasks doing text_io.put/get on
: the terminal and on files and also reading and writing system mailboxes.
: The latter is implemented with QIO and AST entries.
: 
: The whole thing works fine when compiled with v 1.5, but stumbles with v 2.1.
: (It seems the keyboard wait for text_io.get blocks other tasks as well.)
: 
: I'd like to know some cure for this.. 

Johannes,

	Please post the smallest code example that demonstrates what you
are seeing.

	Please read Section 8.5 in your VAX Ada run-time reference
manual to be sure that you are not incurring any of the known blocking actions
that occur with TEXT_IO.PUT and GET routines.

	It is better to use the Digital supplied package TASKING_SERVICES
than to "roll-your-own" via QIO and AST calls. 


Aloha,
	Richard

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Richard Wallace
Digital Equipment Corporation
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