[Bug 37202] MSWord hangs on opening a document opened in other program

[wine-bugs at winehq.org]

https://bugs.winehq.org/show_bug.cgi?id=37202

Vincent Povirk <madewokherd at gmail.com> changed:

           What    |Removed                     |Added
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           Keywords|                            |regression
                 CC|                            |madewokherd at gmail.com

--- Comment #1 from Vincent Povirk <madewokherd at gmail.com> ---
This is probably a WONTFIX. My guess is that the Linux version of LibreOffice
locks the file differently from the Windows version. The Linux version probably
range-locks the entire thing, while the Windows version uses CreateFile sharing
semantics (not available on Linux).

You should see the same behavior as your Windows VM, if you run the Windows
version of LibreOffice and Word in the same Wine prefix.

You may be able to see the broken behavior without involving Wine, if you run
Linux LibreOffice and Word on real Windows, by putting the shared file on a
network share (but it depends on how the file share protocol maps those locking
operations).

In my testing, Windows does hang when opening a storage file, if byte
0x7fffff92 is locked. This is necessary to implement the rich locking semantics
(see http://source.winehq.org/source/dlls/ole32/storage32.h#0504) of ole
storage based on range locking.

LibreOffice could fix this by locking only bytes 0x7fffff93 through 0x7fffffe2.
We're limited by the design decisions of MS, and I can't think of a way that we
could implement the Windows API correctly while dealing with another program
that range-locks the entire file. I'd be happy to discuss this further with
LibreOffice devs.

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