Shared memory support (MIT-SHM) in 1.7?

Shared memory support (MIT-SHM) in 1.7?

[egerlach]

Hi, 
I've read in http://x.cygwin.com/docs/ug/using-shared-memory.html hat cygwin supports shared memory, but: "Note: for Cygwin 1.5 only". I ask me whether the documentation refers only to older versions of cygwin or also to newer versions 1.6 and 1.7.

Who knows the answer? 

If 1.7 does not support shared memory, so I have to install legacy version 1.5 (see http://www.cygwin.com/win-9x.html ), right?  I've just installed the  latest version 1.7.x , so I uninstall this version (by deleting c:\cygwin, right?) an  I install the setup-legacy.exe , right?

Why I need shared memory? - Because the extreme fast picture viewer kuickshow from KDE only works with shared memory, all picture are black. Kuckshow complains: 
      Xlib:  extension "MIT-SHM" missing on display "192.168.98.101:0.0".
Other picture viewer are not so fast, so I urgently need kuickshow. 

thx
Ekkard




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Re: Shared memory support (MIT-SHM) in 1.7?

[Corinna Vinschen]

On Jul 23 13:21, egerlach@aiai.de wrote:
> Hi, 
> I've read in http://x.cygwin.com/docs/ug/using-shared-memory.html hat cygwin supports shared memory, but: "Note: for Cygwin 1.5 only". I ask me whether the documentation refers only to older versions of cygwin or also to newer versions 1.6 and 1.7.
> 
> Who knows the answer? 
> 
> If 1.7 does not support shared memory, so I have to install legacy version 1.5 (see http://www.cygwin.com/win-9x.html ), right?  I've just installed the  latest version 1.7.x , so I uninstall this version (by deleting c:\cygwin, right?) an  I install the setup-legacy.exe , right?

No.  Read http://x.cygwin.com/docs/ug/using-shared-memory.html again.
It says exactly what you need to do to get XSI shared memory running.
The *note* is for 1.5 only.


Corinna

(*) Btw., named POSIX shared mem support is available since 1.7.  It's
    a pity that MIT-SHM extension uses XSI, rather than POSIX shared
    memory, since you don't need cygserver for the POSIX implementation.

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Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Project Co-Leader          cygwin AT cygwin DOT com
Red Hat

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