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From: geert@fozzie.sun3.iaf.nl (Geert Bosch)
Subject: Re: GNAT and Tasks for OS/2
Date: 1996/12/30
Message-ID: <5a8je0$1lc@fozzie.sun3.iaf.nl>#1/1
X-Deja-AN: 206820415
references: <5a66f5$pqh$1@unlisys.unlisys.net>
organization: La Calandre Infortunee
newsgroups: comp.lang.ada
Date: 1996-12-30T00:00:00+00:00
List-Id: <comp.lang.ada>


Michael Erdmann (boavista@berlin.snafu.de) wrote:
`` Does somebody know, how task are implemented in GNAT for OS/2. Is it 
   nessesary to get an achor block for the PM in every task which may try to
   access PM functions ? ''

Yes, that is necessary since GNAT tasks are mapped onto OS/2 threads.
You also should create a window in the task that will execute the
messageloop or OS/2 will put messages in the wrong queue. This makes 
creating multithreaded applications more difficult than it should be.
Unfortunately this is an OS/2 limitation.

At least using Ada you can encapsulate these things in a package with
a clean interface.

Regards,
   Geert
-- 
E-Mail: geert@sun3.iaf.nl : Die Windows is hartstikke vaag man, daar moeten 
                          : we een glazenwasser bij halen! (Meneer Jos)