Xen devel - May 2006 - is it possible share memory between domains like shmget, shmat??

hi all
  
  am a newbie to xen. was wondering if there is a way to share memory  between
domains. i need to be able to write to a shared memory from one  domain and
allow other domain(s) to read from it. for example domA is  always the writer
and domB or domC are always readers. to be able to do  that does hypervisor
provide anything like "shmget" for domA and  "shmat" for
domB and domC?:)
  
  i''m just reading up grant tables etc where some frames are shared 
between domains. would grant tables mechanism allow me to do above  thing? if
so, can domA grant read access to, say 20 frames, for domB  and domC upfront and
never revoke them?
  
  am now looking at docs/misc/grant-tables.txt. any other doc/code that shows
how to do above thing?
  
  thanks
  
		
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