cygwin 1.5.3-1

[Harold L Hunt II]

Ralf,

Could you try moving the CheckForRunningIPCDaemon function to 
hw/xwin/winshm.c/winCheckForRunningIPCDaemon ?  I am just thinking that 
the patch is more likely to get included if it doesn't clutter extension 
files with Cygwin-specific stuff.

Harold

Ralf Habacker wrote:
>>Ralf --
>>   What happens when you run your cygipc-based build of X11, but do not
>>have the ipc-daemon running?  You can't run KDE, of course, but does the
>>Xserver itself still work properly?  Can non-KDE X apps work?
>>
> 
> Xfre has build in support for disabling XIT-SHM support in cases the kernel does
> not support it.
> See http://www.atomised.org/docs/XFree86-4.2.1/shm_8c-source.html
> 
> xc/programs/Xserver/xext/shm.c
> <snip>
> 
> void
> ShmExtensionInit()
> {                                                                            
>     ExtensionEntry *extEntry;                                                
>     int i;                                                                   
>                                                                              
> #if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__)      
>     if (!CheckForShmSyscall())                                               
>     {                                                                        
> 	ErrorF("MIT-SHM extension disabled due to lack of kernel support\n");      
> 	return;                                                                    
>     }                                                                        
> <snip>
> 
> Because the cypipc produces a valid return code ENOSYS in cases the ipc-daemon isn't available, 
> see http://www.cygwin.com/ml/cygwin/2002-11/msg00136.html, there is only a simple checker functions needed to check the state of the ipc-daemon and enable/disable shm functions. 
> 
> The appended patch implemented this support for the xfree server. 
> 
> See the result: 
> 
> cd ~/src/xc/programs/Xserver
> $ killall ipc-daemon 
> $ ./XWin.exe &
> $ xdpyinfo | grep MIT-SHM 
> 
> $ killall XWin 
> $ ipc-daemon & 
> $ ./XWin.exe &
> $ xdpyinfo | grep MIT-SHM 
>     MIT-SHM
> 
> Hope that helps 
> 
> cheers 
> Ralf 
> 
> 
> 
>>--
>>Chuck
>>
>>
>>Harold L Hunt II wrote:
>>
>>
>>>Well, that makes it easy.  SHM will not be supported by this new build.
>>>
>>>Harold
>>>
>>>Christopher Faylor wrote:
>>>
>>>
>>>>On Thu, Sep 04, 2003 at 04:45:34PM -0400, Harold L Hunt II wrote:
>>>>
>>>>
>>>>>I am not sure.  How "automagically" is the IPC daemon installed?  If 
>>>>>it requires user intervention, then we cannot really have XShm in the 
>>>>>default install.
>>>>
>>>>
>>>>
>>>>You could make it a setup.hint dependency, of course, but that's only
>>>>half the battle.  The next step would be to get the cygipc daemon
>>>>started.  I don't think you want to go through that pain unless there is
>>>>a clean fallback for when cygipc isn't working right.
>>
>>
>>