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Date: Mon, 07 Nov 2005 15:55:20 +0100
From: Poul-Erik Andreasen <poulerik@pea.dk>
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Subject: Re: Advice on abort
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Date: 2005-11-07T15:55:20+01:00
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REH wrote:
> What are the best options when a task needs to be terminated, but
> signaling the task may not be possible?  We have tasks that sometimes
> need to be terminated, but may potentially be blocked on a resource,
> such as a socket.  Currently we use OS-specific calls to terminate the
> task, but I've never liked that.  I've been thinking of using the abort
> statement, but I don't think that's very graceful either.  I also would
> rather not complicate the code (or force polling behavior) by making
> the sockets non-blocking.  Any advice?
> 
One poosibillty is too use asyncronius transfer of control. Somthing 
like this.


select
    call.foo_entry  -- this i is a guarded entry in a protected 
object or 				--	another task
    -- her can you have anything yuo may need to clean up after the abort
then abort
    listen_to_socket  this is the function wich may be blocked
end select

Thee foo_entry basicly dosen't need to do anything. an you have onother 
procedure or entry to open it.


PEA.