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Using the VPO Application Programming Interfaces
The VPO Interfaces
Chapter 4 177
Serial MSI Configuration: Example Scenario
Figure 4-4 on page 177 illustrates how messages are distributed in a
scenario where five processes are connected to the MSI: counter,
opcecm, procA, procB and loadmon (load monitor). Incoming messages
go first to counter, then in series to opcecm, then in parallel to both
procA and procB. Finally the message is passed in series to the instance
loadmon. The MSIs that are connected need to be assigned a number for
the configuration to work. The following configuration file represents the
scenario described above:
counter -1
opcecm 0
procA 1
procB 1
loadmon 2
Figure 4-4 Message Distribution in VPO’s Serial MSI
opcecm
Order Number 0
Process A
Order Number 1
loadmon
Order Number 2
Process B
Order Number 1
msg
Counter
Order Number -1
msg
Message Stream Interface