Rockbox mail archive
Subject: Re: sony cd changer emulation almost finishedRe: sony cd changer emulation almost finished
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From: Björn Stenberg <bjorn_at_haxx.se>
Date: Tue, 1 Jun 2004 18:01:50 +0200
sophana wrote:
> I had a look at the plugin mechanism. The big struct containing all the
> pointers is touchy to make backward compatibility.
That's not a big problem with Free Software, since the plugins are always recompiled when the API changes.
Backwards plugin API compatibility is only important if you worry about old binary-only plugins working with new Rockbox versions. That is not a problem we have.
> Is there not another way of making system calls through a trap or
> something like that? (like most modern OS)
Trapping is used for separating user-space and kernel-space code. We don't have anything like that, we just want to call a few functions. So we use simple callbacks.
Date: Tue, 1 Jun 2004 18:01:50 +0200
sophana wrote:
> I had a look at the plugin mechanism. The big struct containing all the
> pointers is touchy to make backward compatibility.
That's not a big problem with Free Software, since the plugins are always recompiled when the API changes.
Backwards plugin API compatibility is only important if you worry about old binary-only plugins working with new Rockbox versions. That is not a problem we have.
> Is there not another way of making system calls through a trap or
> something like that? (like most modern OS)
Trapping is used for separating user-space and kernel-space code. We don't have anything like that, we just want to call a few functions. So we use simple callbacks.
-- Björn _______________________________________________ http://cool.haxx.se/mailman/listinfo/rockboxReceived on 2004-06-01
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