* Signals from ethernet card driver
@ 1999-04-29 0:00 askeya
1999-04-30 0:00 ` Matthew Heaney
` (4 more replies)
0 siblings, 5 replies; 9+ messages in thread
From: askeya @ 1999-04-29 0:00 UTC (permalink / raw)
I am not sure if this is a Solaris or an Ada question so I'll post to
both places.
I am trying to get a driver to signal my Ada program when a TCP/IP
message arrives over an ethernet on a Sun running Solaris 2.7. It would
be great if the signal would act as a task rendezvous. I have done this
on a VAX with VMS using Starlet, but don't have a clue if it can be done
on a Sun with Solaris.
First question: can the driver send a signal when a message arrives?
Second question: In theory, can I receive that signal in my program?
Third question (if you feel ambitious): In general, how?
Thanx.
--
---------------------------------------------------
| Andy Askey |
| Software Engineer |
| Raytheon Systems Company |
| 670 Discovery Drive, Huntsville, AL 35806 |
| Phone: (256) 971-2367 Fax: (256) 971-2306 |
| andrew_j_askey@res.raytheon.com |
---------------------------------------------------
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: Signals from ethernet card driver
1999-04-29 0:00 Signals from ethernet card driver askeya
1999-04-30 0:00 ` Matthew Heaney
@ 1999-04-30 0:00 ` dennison
1999-04-30 0:00 ` Larry Kilgallen
1999-04-30 0:00 ` askeya
` (2 subsequent siblings)
4 siblings, 1 reply; 9+ messages in thread
From: dennison @ 1999-04-30 0:00 UTC (permalink / raw)
In article <3728E864.C1BAB081@res.raytheon.com>,
askeya <askeya@res.raytheon.com> wrote:
> I am trying to get a driver to signal my Ada program when a TCP/IP
> message arrives over an ethernet on a Sun running Solaris 2.7. It would
> be great if the signal would act as a task rendezvous. I have done this
> on a VAX with VMS using Starlet, but don't have a clue if it can be done
> on a Sun with Solaris.
> Second question: In theory, can I receive that signal in my program?
>
> Third question (if you feel ambitious): In general, how?
Before these 2 questions can be answered, you'll have to answer one of ours:
What Ada compiler are you using?
--
T.E.D.
-----------== Posted via Deja News, The Discussion Network ==----------
http://www.dejanews.com/ Search, Read, Discuss, or Start Your Own
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: Signals from ethernet card driver
1999-04-30 0:00 ` dennison
@ 1999-04-30 0:00 ` Larry Kilgallen
0 siblings, 0 replies; 9+ messages in thread
From: Larry Kilgallen @ 1999-04-30 0:00 UTC (permalink / raw)
In article <7gcfho$qqu$1@nnrp1.dejanews.com>, dennison@telepath.com writes:
> In article <3728E864.C1BAB081@res.raytheon.com>,
> askeya <askeya@res.raytheon.com> wrote:
>
>> I am trying to get a driver to signal my Ada program when a TCP/IP
>> message arrives over an ethernet on a Sun running Solaris 2.7. It would
>> be great if the signal would act as a task rendezvous. I have done this
>> on a VAX with VMS using Starlet, but don't have a clue if it can be done
>> on a Sun with Solaris.
>
>> Second question: In theory, can I receive that signal in my program?
>>
>> Third question (if you feel ambitious): In general, how?
>
> Before these 2 questions can be answered, you'll have to answer one of ours:
> What Ada compiler are you using?
But if there is no answer for some compiler, I would be interested
in hearing the answer for some other compiler, since I don't have a
Sun compiler yet :-).
Larry Kilgallen
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: Signals from ethernet card driver
1999-04-29 0:00 Signals from ethernet card driver askeya
` (2 preceding siblings ...)
1999-04-30 0:00 ` askeya
@ 1999-04-30 0:00 ` Tarjei Tj�stheim Jensen
1999-05-27 0:00 ` Vincent Amiot
4 siblings, 0 replies; 9+ messages in thread
From: Tarjei Tj�stheim Jensen @ 1999-04-30 0:00 UTC (permalink / raw)
askeya wrote:
> I am not sure if this is a Solaris or an Ada question so I'll post to
> both places.
>
> I am trying to get a driver to signal my Ada program when a TCP/IP
> message arrives over an ethernet on a Sun running Solaris 2.7. It would
> be great if the signal would act as a task rendezvous. I have done this
> on a VAX with VMS using Starlet, but don't have a clue if it can be done
> on a Sun with Solaris.
>
> First question: can the driver send a signal when a message arrives?
>
> Second question: In theory, can I receive that signal in my program?
>
> Third question (if you feel ambitious): In general, how?
Why not use sockets? I suppose forrest (available at various net sites which
carries ada source) would do nicely. I would even assume that your ada
environment/compiler comes with the neccessary definitions to use sockets.
Greetings,
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: Signals from ethernet card driver
1999-04-29 0:00 Signals from ethernet card driver askeya
@ 1999-04-30 0:00 ` Matthew Heaney
1999-05-03 0:00 ` Vincent P. Amiot
1999-04-30 0:00 ` dennison
` (3 subsequent siblings)
4 siblings, 1 reply; 9+ messages in thread
From: Matthew Heaney @ 1999-04-30 0:00 UTC (permalink / raw)
askeya <askeya@res.raytheon.com> writes:
> I am trying to get a driver to signal my Ada program when a TCP/IP
> message arrives over an ethernet on a Sun running Solaris 2.7. It would
> be great if the signal would act as a task rendezvous. I have done this
> on a VAX with VMS using Starlet, but don't have a clue if it can be done
> on a Sun with Solaris.
>
> First question: can the driver send a signal when a message arrives?
I'm not very driver-literate, but does the client do the I/O using a
file descriptor? Won't SIGIO (SIGPOLL) work?
> Second question: In theory, can I receive that signal in my program?
Try declaring an interrupt handler to catch the signal SIGIO (SIGPOLL).
> Third question (if you feel ambitious): In general, how?
In Ada95, you declare an interrupt handler as a protected procedure, and
bind it to a signal via pragma Interrupt_Handler.
Although it's officially obsolescent, you can also bind an interrupt
handler to a task entry.
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: Signals from ethernet card driver
1999-04-29 0:00 Signals from ethernet card driver askeya
1999-04-30 0:00 ` Matthew Heaney
1999-04-30 0:00 ` dennison
@ 1999-04-30 0:00 ` askeya
1999-04-30 0:00 ` Tarjei Tj�stheim Jensen
1999-05-27 0:00 ` Vincent Amiot
4 siblings, 0 replies; 9+ messages in thread
From: askeya @ 1999-04-30 0:00 UTC (permalink / raw)
I am using the latest version of Rational Apex and the compiler that
comes with.
askeya wrote:
>
> I am not sure if this is a Solaris or an Ada question so I'll post to
> both places.
>
> I am trying to get a driver to signal my Ada program when a TCP/IP
> message arrives over an ethernet on a Sun running Solaris 2.7. It would
> be great if the signal would act as a task rendezvous. I have done this
> on a VAX with VMS using Starlet, but don't have a clue if it can be done
> on a Sun with Solaris.
>
> First question: can the driver send a signal when a message arrives?
>
> Second question: In theory, can I receive that signal in my program?
>
> Third question (if you feel ambitious): In general, how?
>
> Thanx.
--
---------------------------------------------------
| Andy Askey |
| Software Engineer |
| Raytheon Systems Company |
| 670 Discovery Drive, Huntsville, AL 35806 |
| Phone: (256) 971-2367 Fax: (256) 971-2306 |
| andrew_j_askey@res.raytheon.com |
---------------------------------------------------
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: Signals from ethernet card driver
1999-04-30 0:00 ` Matthew Heaney
@ 1999-05-03 0:00 ` Vincent P. Amiot
1999-05-07 0:00 ` askeya
0 siblings, 1 reply; 9+ messages in thread
From: Vincent P. Amiot @ 1999-05-03 0:00 UTC (permalink / raw)
SIGIO can be used on UNIX non-multithreaded systems not to have to resort
to polling...
But on multi-threaded systems that do map Ada tasks onto threads/LWP your
best bet is to dedicate a thread that would block itself on a READ (a
blocking call actually stops the thread on a semaphore, the semaphore is
'signaled' in the driver itself and the thread released... This alleviate
the need for setting a handler in user code that will in turn (through some
high level Ada interface) signal a semaphore/CV through a system call
etc...
To summarize SIGIO is great but only for non-multithreaded applications, if
you need more details about out to set it up, get back to me...
Vincent Amiot
Principal Consultant / Aonix
Tel: (619) 253 1836
--
Matthew Heaney <matthew_heaney@acm.org> wrote in article
<m3yajar74r.fsf@mheaney.ni.net>...
> askeya <askeya@res.raytheon.com> writes:
>
> > I am trying to get a driver to signal my Ada program when a TCP/IP
> > message arrives over an ethernet on a Sun running Solaris 2.7. It
would
> > be great if the signal would act as a task rendezvous. I have done
this
> > on a VAX with VMS using Starlet, but don't have a clue if it can be
done
> > on a Sun with Solaris.
> >
> > First question: can the driver send a signal when a message arrives?
>
> I'm not very driver-literate, but does the client do the I/O using a
> file descriptor? Won't SIGIO (SIGPOLL) work?
>
> > Second question: In theory, can I receive that signal in my program?
>
> Try declaring an interrupt handler to catch the signal SIGIO (SIGPOLL).
>
> > Third question (if you feel ambitious): In general, how?
>
> In Ada95, you declare an interrupt handler as a protected procedure, and
> bind it to a signal via pragma Interrupt_Handler.
>
> Although it's officially obsolescent, you can also bind an interrupt
> handler to a task entry.
>
>
>
>
>
>
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E;VT-"E)%5CHQ.3DY,#4P,U0R,S0S-3!:#0I%3D0Z5D-!4D0-"D!A
`
end
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: Signals from ethernet card driver
1999-05-03 0:00 ` Vincent P. Amiot
@ 1999-05-07 0:00 ` askeya
0 siblings, 0 replies; 9+ messages in thread
From: askeya @ 1999-05-07 0:00 UTC (permalink / raw)
Thanx for all the input. These ideas have really helped out design
process.
---------------------------------------------------
| Andy Askey |
| Software Engineer |
| Raytheon Systems Company |
| 670 Discovery Drive, Huntsville, AL 35806 |
| Phone: (256) 971-2367 Fax: (256) 971-2306 |
| andrew_j_askey@res.raytheon.com |
---------------------------------------------------
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: Signals from ethernet card driver
1999-04-29 0:00 Signals from ethernet card driver askeya
` (3 preceding siblings ...)
1999-04-30 0:00 ` Tarjei Tj�stheim Jensen
@ 1999-05-27 0:00 ` Vincent Amiot
4 siblings, 0 replies; 9+ messages in thread
From: Vincent Amiot @ 1999-05-27 0:00 UTC (permalink / raw)
askeya wrote:
> I am not sure if this is a Solaris or an Ada question so I'll post to
> both places.
>
> I am trying to get a driver to signal my Ada program when a TCP/IP
> message arrives over an ethernet on a Sun running Solaris 2.7. It would
> be great if the signal would act as a task rendezvous. I have done this
> on a VAX with VMS using Starlet, but don't have a clue if it can be done
> on a Sun with Solaris.
>
> First question: can the driver send a signal when a message arrives?
On non multithreaded systems SIGIO can generally be generated by an
activity on the socket
>
>
> Second question: In theory, can I receive that signal in my program?
>
See Attach_Handler / Interrupt_Handler pragmas/subprograms
>
> Third question (if you feel ambitious): In general, how?
>
as usual: with care & determination!
>
> Thanx.
> --
> ---------------------------------------------------
> | Andy Askey |
> | Software Engineer |
> | Raytheon Systems Company |
> | 670 Discovery Drive, Huntsville, AL 35806 |
> | Phone: (256) 971-2367 Fax: (256) 971-2306 |
> | andrew_j_askey@res.raytheon.com |
> ---------------------------------------------------
^ permalink raw reply [flat|nested] 9+ messages in thread
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1999-04-29 0:00 Signals from ethernet card driver askeya
1999-04-30 0:00 ` Matthew Heaney
1999-05-03 0:00 ` Vincent P. Amiot
1999-05-07 0:00 ` askeya
1999-04-30 0:00 ` dennison
1999-04-30 0:00 ` Larry Kilgallen
1999-04-30 0:00 ` askeya
1999-04-30 0:00 ` Tarjei Tj�stheim Jensen
1999-05-27 0:00 ` Vincent Amiot
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