kopia lustrzana https://gitlab.com/sane-project/website
65 wiersze
2.8 KiB
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65 wiersze
2.8 KiB
HTML
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<!-- received="Fri Feb 26 14:00:08 1999 PST" -->
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<!-- sent="Fri, 26 Feb 1999 22:44:50 +0100" -->
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<!-- name="Svend Daugaard Pedersen" -->
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<!-- email="sdp@vip.cybercity.dk" -->
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<!-- subject="Re: Porting SANE backends" -->
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<!-- inreplyto="36D6D00B.836D5150@wolfsburg.de" -->
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<title>sane-devel: Re: Porting SANE backends</title>
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<h1>Re: Porting SANE backends</h1>
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<b>Svend Daugaard Pedersen</b> (<a href="mailto:sdp@vip.cybercity.dk"><i>sdp@vip.cybercity.dk</i></a>)<br>
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<i>Fri, 26 Feb 1999 22:44:50 +0100</i>
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<p>
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<ul>
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<li> <b>Messages sorted by:</b> <a href="date.html#194">[ date ]</a><a href="index.html#194">[ thread ]</a><a href="subject.html#194">[ subject ]</a><a href="author.html#194">[ author ]</a>
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<li> <b>Next message:</b> <a href="0195.html">Tim Waugh: "HP ScanJet 5p scan button"</a>
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<li> <b>Previous message:</b> <a href="0193.html">Dr. Andreas Bolsch: "Re: horizontal stripes in your image"</a>
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</ul>
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Oliver Rauch wrote:<br>
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<p>
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<p>
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<i>>How do you start a new task on the amiga?</i><br>
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<p>
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It is done in several ways.<br>
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<p>
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You may call a system routine with the address of the code to be<br>
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started as a new task (with some optional information such as size<br>
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of stack etc.) Since you have to specify the address it is typically<br>
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a subroutine you start.<br>
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<p>
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This is the problem. 'fork()' starts a new task in the middle of a<br>
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subroutine. Of cause there is a way out of this problem but to make<br>
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an implementation you have to know a lot more about 'fork()' and<br>
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related routines than I do. And although you can find a lot of UNIX<br>
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routines ported for the Amiga on the Net (I found alloca() on the Net)<br>
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it seems as if nobody has ever tried to implement 'fork()'.<br>
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<p>
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To go back to the start of this discussion. If you really need to use<br>
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non ANSI C stuff please do it in a way that makes it easy to remove.<br>
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As I said in my first letter I have ported 4 backends until now (and I<br>
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am on the way to add two or three more). But I do not have all these<br>
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scanners my self and I cannot test the porting my self. This is not<br>
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possible if you have to make a lot of changes in the code.<br>
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<br>
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Svend<br>
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<p>
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<p>
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<pre>
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--
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Source code, list archive, and docs: <a href="http://www.mostang.com/sane/">http://www.mostang.com/sane/</a>
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To unsubscribe: echo unsubscribe sane-devel | mail <a href="mailto:majordomo@mostang.com">majordomo@mostang.com</a>
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</pre>
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<!-- body="end" -->
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<p>
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<ul>
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<!-- next="start" -->
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<li> <b>Next message:</b> <a href="0195.html">Tim Waugh: "HP ScanJet 5p scan button"</a>
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<li> <b>Previous message:</b> <a href="0193.html">Dr. Andreas Bolsch: "Re: horizontal stripes in your image"</a>
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<!-- nextthread="start" -->
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</ul>
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