CompuLab SBC-X270 Manual do Utilizador descarregar pdf (Página 102)

SCIOPTA - Real-Time Kernel

12-8 Manual Version 4.1 User’s Manual

SCIOPTA - Real-Time Kernel

12 Additional Functions

12.9.3 Transparent Communication

If a process in one system (CPU) wants to communicate with a process in another system (CPU) it first will search

for the remote process by using the sc_procIdGet system call. The parameter of this call includes the process name

and the path to where to find it in the form: system/module/procname.The kernel transmits a message to the con

nector including the inquiry.

All connectors start communicating to search for the process. If the process is found in the remote system the con-

nector will assign a free process ID for the system, add it in a remote process list and transmits a message back to

the kernel including the assigned process ID. The kernel returns the process ID to the caller process.

The process can now transmit and receive messages to the (remote) process ID as if the process is local. A similar

remote process list is created in the connector of the remote system. Therefore the receiving process in the remote

system can work with remote systems the same way as if these processes where local.

If a message is sent to a process on a target system which does not exist (any more), the message will be forwarded

to the default connector process.

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CompuLab SBC-X270 Manual do Utilizador Página 102