Delegation, more questions ..
Megh Ranade
Delegation appears to be a very useful feature: It can allow a programmer to
leave the 'core agent' alone & use threads in his/her embedded system code to
service requests. Anybody tried this?
How does one deal with 'Event Based' rather than Fixed Timout based
delegation? One option is to keep delegating a request (in small increments)
until THAT Event occurs. Another possibility is that we first delegate the
request with a IMPOSSIBLY LARGE Timeout & then when the Event occurs,
somehow 'RESCHEDULE' (decrease the timeout) of the the delegated request.
Perhaps this can be done simply by changing the timeout value in the
delegation 'Q' & then programmatically generating a ALARM signal. Wes,
Javier, Corey, others ..Would this work?
- Megh Ranade, Kenati Technologies
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Wes Hardaker
Megh> Delegation appears to be a very useful feature: It can allow a
Megh> programmer to leave the 'core agent' alone & use threads in
Megh> his/her embedded system code to service requests. Anybody tried
Megh> this?
Warning: threads will almost certainly *not* work.
Megh> How does one deal with 'Event Based' rather than Fixed Timout
Megh> based delegation?
Typically, you'd register your sockets to watch using the
register_readfd function (for example).
Megh> One option is to keep delegating a request (in small increments)
Megh> until THAT Event occurs. Another possibility is that we first
Megh> delegate the request with a IMPOSSIBLY LARGE Timeout & then when
Megh> the Event occurs, somehow 'RESCHEDULE' (decrease the timeout) of
Megh> the the delegated request. Perhaps this can be done simply by
Megh> changing the timeout value in the delegation 'Q' & then
Megh> programmatically generating a ALARM signal. Wes, Javier, Corey,
Megh> others ..Would this work?
Do not use an alarm signal! I promise a mess will result!
You should just be able to mark the delegated flag in a request you
are processing as no longer delegated/delayed, and the agent will
automatically find it. Unless your situation is odd, this will likely
work without you needing to think about it (at least I designed it
that way).
--
Wes Hardaker
Network Associates Laboratories
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