Re: Multithreading

From: [at]} <Werner>
Date: Thu, 20 Feb 2003 08:47:34 +0100

----boundary-LibPST-iamunique-848809537_-_-
Content-type: text/plain

There is another way to provide "Multi-Tasking" with
BlackBox.

BlackBox.exe accepts Command-Line Parameters.
Open a Shell, CD to the BlackBox Direcotry and enter:
> BlackBox.exe /par "my paramter list"
Within the called BlackBox you can view the
paramter in the variable Dialog.commandLinePars

You can start any Command using
HostDialog.Start

So how to implement this

Master-Process
======
Call Slave-Process HostDialog.Start('BlackBox /par "my parameters or param-file" ')
Use a Service.Action for polling if the file "Slave-running.empty" still exists.
After the file is gone read in the data out of the param-file or any other data-file.

Slave-Process
======
Modify module Config to check if some paramters have passed.
(We use this technique in our Web-Framework for load-balancing.)
(See the modules Startup and Config of our O³ Tools for BlackBox.)

Create file "Slave-running.empty"
Read in Parameter List or file
Do non blocking stuff, write Data-File
Delete file "Slave-running.empty"
exit using Kernel.Quit(0) (which prevents opening Pop-Up-Boxes)

ready



> >I am acquiring data
> >from a USB device using the standard Windows call
> >WinApi.DeviceIoControl. This call appears to be blocking,
> >i.e., it does not return unless the device sends the
> >requested data. In case the device does not have data,
> >the call stalls, and as a consequence BlackBox becomes
> >unresponsive (an hour glass appears on screen).
>
> Couldn't you simply use Blackbox's "Services.Action"
> routines to prevent the Blackbox framework from
> being unresponsive?
>
> Although I'll always second any suggestion to improve
> the multi-threading capabilities of Blackbox -- I've been
> suggesting this since 1996! In my case, I have a long
> running command which calls a Fortran DLL which in
> turns calls my Blackbox code. Unfortunately, whenever
> the Fortran DLL is being executed, the Blackbox
> framework becomes unresponsive and I can no longer
> do anything in it until the Fortran DLL is finished.
> And there doesn't appear to be any way to use the
> "Services.Action" routines to fix this. I also once
> tried using Windows process threads to try to workaround
> this, but this caused the Blackbox framework to crash.
>
> Marc Martin
> marc.martin{([at]})nowhere.xy
> Boeing Commercial Space Company
> --------------------------------------------
>
> To unsubscribe from this mailing list, send a message containing the word
> "unsubscribe" to: blackbox-request{([at]})nowhere.xy
>
> To get a list of valid e-mail commands and instructions on their usage,
> send a message containing the word "help" to the above address.
>
> Send any problem reports or questions related to this email list to the
> list owner at owner-blackbox{([at]})nowhere.xy
>
> Current posting policy:
>
> a) To post you should use the same address by which you are subscribed to
> the mailing list. That way, the list server will recognize you as
> subscriber and forward your posting immediately, without creating any
> overhead.
>
> b) If, for some reason, you cannot post from the address, by which you are
> subscribed, your message will be moderated to avoid spam. Please understand
> that moderation will often cause some delay, in particular over weekends or
> holydays.

-- 
mit freundlichen Grüssen
Werner Braun
O³ Software GmbH & Co. KG * Eichkamp 1 * D-24217 Schönberg
http://www.o3-software.de * Telefon: 04344 41417-2
--------------------------------------------
To unsubscribe from this mailing list, send a message containing the word "unsubscribe" to:
   blackbox-request{([at]})nowhere.xyTo get a list of valid e-mail commands and instructions on their usage, send a message containing the word "help" to the above address.
Send any problem reports or questions related to this email list to the list owner at
   owner-blackbox{([at]})nowhere.xyCurrent posting policy:
a) To post you should use the same address by which you are subscribed to the mailing list. That way, the list server will recognize you as subscriber and forward your posting immediately, without creating any overhead.
b) If, for some reason, you cannot post from the address, by which you are subscribed, your message will be moderated to avoid spam. Please understand that moderation will often cause some delay, in particular over weekends or holydays.
----boundary-LibPST-iamunique-848809537_-_-
Content-type: application/rtf
Content-transfer-encoding: base64
Content-Disposition: attachment; filename="rtf-body.rtf"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----boundary-LibPST-iamunique-848809537_-_---

Received on Thu Feb 20 2003 - 08:47:34 UTC