[Boost-users] [interprocess] shared_memory_object opened or created?

From: Boris (boriss_at_[hidden])
Date: 2008-03-18 13:55:36

If I instantiate a shared_memory_object with open_or_create how do I know  
if it was opened or created? I ask as if it was created I need to create a  
structure in the mapped region. If it was opened though I must not create  
a structure (as another program created the structure before and I might  
overwrite data).

I ran into this problem after creating a reader and writer. They exchange  
data using a shared_memory_object. It would be great if I could start the  
two programs in any order. But currently the programs don't know which one  
created and which one opened the shared memory. Do I miss anything or was  
open_or_create added for another use case?

Boris