Registration
Recognition/
Generation Stubs
CommonUtilitiesUser DefinedProcedures
Target Protocol
Layer
PFI LayerSendFilterReceiveFilter
Lower Layers
Tcl Script
C Procedures
C Procedures
C Procedures
Higher Layer Interface Code
HL Output Routine
Send Queue
PFI CoreRegistered RoutinesScript Interpreter
Event SupportMechanism
PolledLL Input RoutineLower Layer Interface Code
Applications
Libsocket.a Socket Interface
Solaris Kernel(a) SolarisApplications
Libc.a Socket Interface
Libsockets.a Socket Interface
Socket Library
UX Server
Real-Time Mach 3.0
(b) Real-Time Mach
GMD ProcessGMPSocket InterfaceSolaris Socket Library(a) Original GMDGMD ProcessGMPORCHESTRASocket InterfaceORCHESTRASocket InterfaceSolaris Socket Library(b) Relinked GMDTo NetworkFrom Network
RT-Phone Application
AudioSend
AudioRecv
AudioServerAudioServer
Audio device driver
Real-Time MachHardware
SB1SB2
Processor 1
Stage 3
Stage 1T
Stage 2T
Network
Delay
Processor 2Stage 4T
Stage 5T
User Defined ScriptCounterDrop the MessageDelay the MessageExit the ScriptInject a New Message