getLastIndex            Functions to manipulate shared memory
getSharedObjectProperty
                        Get/Set the properties of the shared object.
is.altrep               Whether an object is an ALTREP object
is.shared               Test whether the object is a shared object
listSharedObject        Get the shared object usage report
pkgconfig               Find path of the shared memory header file
setSharedObjectOptions
                        Get or set the global options for the
                        SharedObject package
share                   Create an R object in the shared memory
