dsound: Runtime link to advapi32 RegDeleteTree

Maarten Lankhorst m.b.lankhorst at gmail.com
Mon Sep 3 15:52:05 CDT 2007

Reece Dunn schreef:
> Correct me if I am wrong on this, but I have a few questions. And I
> apologise if I ask some stupid questions, as I don't understand how
> the Wine loader works.
> On 01/09/07, Maarten Lankhorst <m.b.lankhorst at gmail.com> wrote:
>> Makes the dsound dll work in windows xp and older versions of windows
>> again.
> By this, do you mean running the Wine dsound.dll on _native_ Windows?
Yes, what other windows is there? Wine dsound works fine under windows.
>> It is the least of all evils as far as I could see. It's either
>> this or adding RegDeleteTree to libwine, unless someone has a third option.
> If the intent is to get this working on native, adding RegDeleteTree
> to libwine will not help. Unless you mean running Wine in Windows XP
> or earlier compatibility mode? If so, I was under the assumption that
> all the API were available to Wine, it was just the reported OS
> version that differed. I say this, because none of the Windows headers
> vary on OS version like the Windows SDK does.
Running a mingw compiled dsound in windows xp or earlier. In wine it
will work correctly even in xp mode. It may not be a bad idea to add a
function to libwine that can be used in case RegDeleteTree is
unavailable in advapi32.
> Even so, since the RegDeleteTree API are queried for by
> GetProcAddress, this means that they will not be found on WinXP and
> earlier, so DllUnregisterServer will fail on those platforms, leaving
> behind the dsound GUIDs on those platforms. This is bad practice, but
> I don't see how else this will work (assuming that these are run on
> native).
I am aware of that, however you can still use the native dsound to
unregister in those cases, which may not be ideal but should work.
>> +static typeof(RegDeleteTreeW) * pRegDeleteTreeW;
> Is it common practice in Wine to use typeof? I was under the
> assumption that this was limited to the gcc C++ compiler. Even if it
> is available in the C compiler, it is not portable to compilers that
> don't support that, such as pre-typeof gcc compilers.
If you check in the wine tree, other places use typeof too, so I didn't
think it would be that big an issue.


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