From: Stephen Leake <Stephe.Leake@nasa.gov>
Subject: Re: help plz.
Date: 10 Jun 2003 14:15:45 -0400
Date: 2003-06-10T18:15:49+00:00 [thread overview]
Message-ID: <u7k7ter3i.fsf@nasa.gov> (raw)
In-Reply-To: bc50h3$25k$1@atlantis.news.tpi.pl
I think I have a general idea of what you are looking for, but I can't
help unless you ask a specific Ada question.
This sounds like a homework problem, rather than a real-life problem.
If it is homework, have you tried asking your instructor?
"Fisher" <fisher@biuroserwis-kalisz.com> writes:
> hi
>
> thanks for Your answers.
>
> I have with this Ada problem.
>
> it walks about something like this, as dynamic priorities:
>
> we have N processes (let's put 7)
>
> the attached priority becomes every of processes
>
> np. P1 has 1 ( the highest), P2 - 2, P3 - 3 itd P7 -7.
>
> processes look as follows: local section - some delay
>
> and critical section - some delay
>
> it walks about show dynamic priority use only.
>
> we have the protected object and these processes compete to access to
>
> this object to execute his critical section.
>
> if P1 competes from P2 this P1 comes in and executes critical section
>
> (because P1 has higher priority than P2).
>
> after exit from protected object P1 sets his priority on the lowest,
>
> sets his priority on 7 and the rest of processes raises,
>
> that is P2 -1 (highest), P3 -2 .... P7-6 and to the end P1 -7.
>
> however if (from start state) about entry to protected object
>
> it competes P3 and P4 ( P3 comes in)
>
> after exit from object alters the priorities of processes, but only these,
>
> which they are for him, that is P1 becomes without changes, P2 without
> changes, P4 -3,
>
> P5-4, P6-5,P7-6 and P3-7.
>
> I have to show this use only.
>
> Please help me if You can.
>
> My work inflicts that I haven't time for nothing besides sleep.
>
> I will be very grateful for Your help.
>
> I apologize for my English, it is not on top-level.
>
>
>
> Fisher
>
> fisher@biuroserwis-kalisz.com
>
> Poland
>
>
>
>
>
>
--
-- Stephe
next prev parent reply other threads:[~2003-06-10 18:15 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-06-09 15:29 help plz Fisher
2003-06-09 18:26 ` Stephen Leake
2003-06-09 23:15 ` Wojtek Narczynski
2003-06-10 2:47 ` Steve
2003-06-10 16:20 ` Fisher
2003-06-10 18:15 ` Stephen Leake [this message]
2003-06-10 19:34 ` Fisher
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