Semaphores without using entry

Semaphores without using entry

[Jos� Alberto]

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Hello to everybody,

I need to use semaphores for a concurrent program, but I've been told not to
use the entry clause, but I can use the Ada.Synchronous_Task_Control
package.

Can anybody help me?

Thanks in advance

Jos� Alberto

Re: Semaphores without using entry

[Michal Nowak]

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On 01-12-27 at 10:53 José Alberto wrote:

>Hello to everybody,
>
>I need to use semaphores for a concurrent program, but I've been told not
>to
>use the entry clause, but I can use the Ada.Synchronous_Task_Control
>package.
>
>Can anybody help me?
>
>Thanks in advance
>
>José Alberto

Try to read in Reference Manual, Annex D, Section D.10.
You should find enough info to give you idea how to
solve you problem there.

http://www.adapower.com/rm95/index.html
http://www.adapower.com/rm95/arm95_296.html#SEC296

Good luck,
Mike
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/ >       vinnie@inetia.pl           |
http://www.geocities.com/vinnie14pl _|__

Re: Semaphores without using entry

[Jos� Alberto]

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Thanks for your help

Jos� Alberto Adrados Sanz
"Michal Nowak" <vinnie@inetia.pl> escribi� en el mensaje
news:mailman.1009447502.24237.comp.lang.ada@ada.eu.org...
On 01-12-27 at 10:53 Jos� Alberto wrote:

>Hello to everybody,
>
>I need to use semaphores for a concurrent program, but I've been told not
>to
>use the entry clause, but I can use the Ada.Synchronous_Task_Control
>package.
>
>Can anybody help me?
>
>Thanks in advance
>
>Jos� Alberto

Try to read in Reference Manual, Annex D, Section D.10.
You should find enough info to give you idea how to
solve you problem there.

http://www.adapower.com/rm95/index.html
http://www.adapower.com/rm95/arm95_296.html#SEC296

Good luck,
Mike
-----------------------------------------
                             ____|
                             \%/ |~~\
  O                                  |
 o>>        Mike Nowak               |
 T                                   |
/ >       vinnie@inetia.pl           |
http://www.geocities.com/vinnie14pl _|__

Re: Semaphores without using entry

[Matthew Heaney]

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"Jos� Alberto" <HIGHLAND@santandersupernet.com> wrote in message
news:a0eqqq$9dk$1@news.ya.com...
> Hello to everybody,
>
> I need to use semaphores for a concurrent program, but I've been told not
to
> use the entry clause, but I can use the Ada.Synchronous_Task_Control
> package.

You may want to take a look at my article in the patterns archive, on this
very subject:

I'm Queueless, or, Suspension Objects Instead of Entries
http://www.acm.org/archives/wa.cgi?A2=ind9904&L=patterns&P=R7659

See also:

Task Synchronization Using Suspension Objects
http://www.acm.org/archives/wa.cgi?A2=ind9904&L=patterns&P=R4138

Re: Semaphores without using entry

[Matthew Heaney]

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"Jos� Alberto" <HIGHLAND@santandersupernet.com> wrote in message
news:a0eqqq$9dk$1@news.ya.com...
> Hello to everybody,
>
> I need to use semaphores for a concurrent program, but I've been told not
to
> use the entry clause, but I can use the Ada.Synchronous_Task_Control
> package.

Actually, when I searched for "suspension" using the search engine, these 5
articles came up:

      Item # Date Time Recs   Subject
      000143 99/04/11 01:35 226  Task Synchronization Using Suspension
Objects
      000155 99/04/19 04:54 427  I'm Queueless, or, Suspension Objects
Instead of Entries
      000159 99/05/05 01:26 727  Do Not Entry: Bounded Queue of Suspension
Objects
      000173 99/10/24 17:19 380  Bounded Buffer with Entry-less Get Queue
      000175 99/10/27 00:05 412  Bounded Buffer with Entry-less Get Queue -
Update


See http://www.acm.org/archives/patterns.html for the complete list.

I did a whole series of articles about concurrency patterns in Ada95.  Maybe
they will be of some use to you.