Shared memory

CMRX does not allow for unconditional sharing of memory between two processes. Memory can be shared only between two processes during the remote procedure call. Even at this time, the process which serves the RPC does not have full access to the caller’s memory. This is to ensure robustness. If client has a need to communicate larger chunk of data with RPC server, then the buffer holding this data must be marked as belonging to the shared memory.

Function-like Macros

SHARED

If this specifier is used while defining a variable, then this variable will be reachable from within RPC call routine. Effectively this specifier moves given variable into process’s shared section, which remains mapped in address space even during RPC call is in progress.