Currently the IPC Shared Memory cookbook page can only be found in the repo as a .cpp file, but it should also be added to the ReadTheDocs as a .rst file
Other notes about IPC shared memory for documentation:
A note about file descriptors used for shared memory. Rao had an issue with this - see email.
A note about how the name in rm.makeResource must contain a "SHARED_" prefix for shared allocators
To find how much memory is available for a shared memory allocator, just call getActualSize() on the allocator (see question in Umpire general teams chat)
Currently the IPC Shared Memory cookbook page can only be found in the repo as a .cpp file, but it should also be added to the ReadTheDocs as a .rst file