Groups > comp.sys.acorn.programmer > #6620

Re: Watchdog and closing application child tasks

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From	Martin <News04@avisoft.f9.co.uk>
Newsgroups	comp.sys.acorn.programmer
Subject	Re: Watchdog and closing application child tasks
Date	Sun, 15 Mar 2026 07:59:54 +0000 (GMT)
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In article <20deb3b95c.Paul@phorefaux>,
   Paul Stewart <phorefaux@gmail.com> wrote:

> Does the system watchdog broadcast a specific message to terminate
> an application?

> The reason for asking is I have an application written in BASIC
> that spawns a couple of child tasks.  As part of the close down
> routine it does close down any open child tasks.  This appears to
> be working fine.  If I quit the program whilst child task is
> running, then the open child task quits, as expected, same as if I
> quit my application from Task display/Task manager.

> However when the task is closed via system watchdog(Alt-Break), the
> main task is closed, but not any open child tasks.  I am therefore
> wondering if there is a specific message I need to listen out for
> so I can close the child tasks too?

The Watchdog terminates a task immediately. The task has no control at
all, so gets no chance to take any action whatsoever. Any open files
will be left open. Such termination really should be a last resort to
regain control of the machine, but the task is toast.

-- 
Martin Avison 
Note that unfortunately this email address will become invalid
without notice if (when) any spam is received.

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Watchdog and closing application child tasks Paul Stewart <phorefaux@gmail.com> - 2026-03-15 01:07 +0000
  Re: Watchdog and closing application child tasks Martin <News04@avisoft.f9.co.uk> - 2026-03-15 07:59 +0000
    Re: Watchdog and closing application child tasks Paul Stewart <phorefaux@gmail.com> - 2026-03-15 16:36 +0000

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