RE: Possible cause of Windows 98 failures?

["Suhaib Siddiqi" <ssiddiqi at inspirepharm dot com>]

Harold,
How about you write to Peter Busch about it.  His address is
pbusch [pbusch@dfki.de]

XWIN.exe should not make any calls to ntux_dx dlls.  That one was for xvfb.
The initoutput.c was copied from xvfb directory and adapted fro xwin.exe,
could be possible that errors are left in there.  Peter might be able to
explain
better, because he rewrote the original DirectX code and moved the codes to
xf_dx.dll.

Suhaib

> -----Original Message-----
> From: cygwin-xfree-owner@sources.redhat.com
> [mailto:cygwin-xfree-owner@sources.redhat.com]On Behalf Of Harold Hunt
> Sent: Thursday, September 28, 2000 10:02 AM
> To: Cygx (E-mail)
> Subject: Possible cause of Windows 98 failures?
>
>
> Suhaib,
>
> Okay, I downloaded the source for xf_dx.dll.  Thank you for pointing me to
> it.
>
> I'm looking at what should be the code for Xwin.exe in the
> xfree86 cvs tree
> xc/programs/Xserver/hw/xwin/.  Is that the correct directory?  Are the CVS
> files up to date?  The time stamps on the files in that directory are all
> 8/10/2000.
>
> If been poking around and I'm realizing that map_dx_fb() from ntux_xf.c is
> deprecated.  winAllocateFramebufferMemory() in InitOutput.c has commented
> out calls to map_dx_fb() that were replaced with a call to
> winDXAllocateFramebufferMemory() of xf_xf.dll (at least indirectly of that
> dll).
>
> ntux_xf.c contains support functions that should not be used in
> xwin.exe, as
> all calls to map_dx_fb() are all commented out; well, excepting
> the call to
> map_dx_fb() in main() of ntux_xf.c, which I am guessing is not used, as
> renaming the xmap.sys file that main() attempts to load does not
> affect the
> behavior of the x server.  The support functions in ntux_xf.c all revolve
> around using IOControls and a shared memory frame buffer, not
> DirectX.  The
> support functions use functions from the Win32 API that only work
> on WinNT,
> as they are not supported on Windows 9X:
> CreateService()
> ControlService()
> DeleteService()
> StartService(), etc.
>
> I'm wondering if the main() function of ntux_xf.c gets called at
> some point
> and inadvertantly tries to call the service functions on Windows 98
> machines, thus causing a crash.  I did a dumpbin -imports on xwin.exe and
> all of the service funtions, as well as iocontrol functions, are linked to
> the executable, thus enabling the possibility of a failed call attempt.
>
> I haven't setup a build environment for xwin.exe, so I can't test
> my theory
> yet.  However, I would like to know if my thinking that the service and
> iocontrol functions are no longer needed.
>
> Thank you,
>
> Harold