DragonFly kernel List (threaded) for 2003-07
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API noodling
> hahahaha. dragonthread... hahahaha.
I assumed there was a dragon:thread Pern pun in 'dragonfly'.
> :> * Use the convenient mostly pre-built message stored in the
> :> * userthread structure
> :> */
> :> msg = &curthread->td_sysmsg;
> :
> :msg = &curthread->td_sysmsg[READ] or something like that, no?
>
> Not unless you want your user thread structure to become hugely bloated!
I was thinking of caching them, not bothering to init the message structure
for a given message type until it was used the first time.
if (!curthread->td_sysmsg[READ]) {
curthread->td_sysmsg[READ] = malloc(...);
... initialise the type and size fields for READ ...
}
Also, don't you need to tell it *which* system call it's using somewhere? :)
Using a union won't give you prebuilt templates for the versionless
universal compatibility sceme you were talking about.
> A user thread will only be in one direct system call interface
> (i.e. read(), write(), gettimeofday()) at a time, so a single
> union'd syscall message structure embedded in the lwkt_thread is
> sufficient.
Two... one for when it's in a signal... if signals aren't handled in a
separate thread.
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