GNAT and Tasks for OS/2

GNAT and Tasks for OS/2

[Michael Erdmann]

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 ?


Michael

Re: GNAT and Tasks for OS/2

[Geert Bosch]

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) 

Re: GNAT and Tasks for OS/2

[boavista]

I did this, but still it does not work. I have the following tasks:

    main-Task : Creates the standardd window, which is root for all 
                     application.
    USER_TASK: Code which does the actual work and which is responsible