- Re[2]: - Paralleling computing with Blackbox and Component Pascal

From: Treutwein Bernhard <"Treutwein>
Date: Fri, 7 Apr 2006 14:47:41 +0200

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[...]
> In my previous letter I was wrong about one thing. You actually can
> link BlackBox into a DLL and then use it from C/C++ code (see
> DevLinker documentation).

hmm, just some thought: There is the option to create a
"dynamic loading" DLL, which is labelled by OMiSys as
"rarely used, present for completeness" which might be
the right thing to use in this case.

> My guess is that you could call simple functions
> from C/C++ threads, but anything involving dynamic
> memory allocation and garbage collection still
> must be done in only one of those threads.
>

this is exactly what you would gain from a dynamic
DLL, i.e. one that includes a BlackBox loader:
it would have a separate GC instance for each thread.

I have no idea, if BlackBox code will be put in
a (shared) code segment or in a thread local
data segment. I know only for shure that "global"
data of a DLL-linked BlackBox module is not global
at all, but thread local. Each thread that attaches
to the DLL gets ist own copy of the "global" data.

So you will have problems with interprocess communication.

regards
   Bernhard

--- BlackBox
--- send subject HELP or UNSUBSCRIBE to blackbox{([at]})nowhere.xy



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Received on Fri Apr 07 2006 - 14:47:41 UTC

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