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Sender: David Brown <davidb@opus.davidb.org>
From: David Brown <davidb-cla@davidb.org>
Subject: Re: asynchronos select question
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Date: Fri, 02 Nov 2001 04:17:09 GMT
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"Peter Henden" <phenden@tdab.com> wrote:
> "Paolo Argenton" wrote:
> <snip>
>> select
>>     delay 5.0;
>>     put_line (" timeout" );
>> then abort
>>     proc_with_blocking_io; -- i.e. wait for a byte to come from a serial
>> line for istance
>> end select;

> Just a question to those who might know. Is this behaviour conforming
> to the standard? I can see no reason in the ARM for not being able
> to abort a blocking io operation. Does it work on other platforms?

This works on arch's such as Linux, where abort is implemented with a
signal.

I understand that NT doesn't really provide a way for one task to
"signal" another task, so there isn't really any way to implement this
in NT.

Dave Brown