[Bug 48620] libmdbx (memory-mapped DB) needs ntdll.NtExtendSection stub

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=48620

--- Comment #10 from Leonid Yuriev <leo at yuriev.ru> ---
(In reply to Zebediah Figura from comment #9)
> It won't work, no, because the generated stub is different for each function
> (it has to include the function name itself).
> 
> Better to try to fix Wine than to work around its insufficiencies in the
> program, anyway.

Many thanks.

Today I committed the workaround into libmdbx. 
For now it is quite simply, since I need solution for all Wine versions, not a
new/future ones.
https://github.com/erthink/libmdbx/commit/f76be142d542f9e1ae712cee503eaa517ae783dc

Unfortunately, there is another problem that was not noticed initially.
For data durability and integrity libmdbx should prevents read/write sharing a
DB over network (e.g. on a network shares), since the underlying file is
memory-mapped.

To do this, libmdbx performs several checks via Windows API. However it is very
problematic to implement the corresponding functionality in Wine (need to
determine the file system type using non-portable methods, and then somehow
translate this information to the Windows API terms. Seems it would be
madness).

So, for now I just added Wine detection and conditionally disabling of some
features.

Regards.

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