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Lec10-Interprocess Communication

Lec10-Interprocess Communication - National University of...

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Operating System Spring 07 National University of Computer & Emerging Sciences Lec10-Interprocess Communication Prepared by Uzma Maroof [email protected]
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2 Class Notes Class Notes
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3 Reference Reference Operating system concepts, Silberschatz, 6 th edition 4.4 4.5.1- 4.5.4 Unix Network Programming Interprocess Communications, Vol. 2, 2 nd edition W. Richard Stevens Chapter 4 Man pages
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4 Interprocess Communication Interprocess Communication A process has access to the memory which constitutes its own address space. When a child process is created, the only way to communicate between a parent and a child process is: The variables are replicas The parent receives the exit status of the child So far, we’ve discussed communication mechanisms only during process creation/termination Processes may need to communicate during their life time.
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5 Cooperating Processes Cooperating Processes Independent process cannot affect or be affected by the execution of another process. Cooperating process can affect or be affected by the execution of another process Advantages of process cooperation Information sharing Computation speed-up: make use of multiple processing elements Modularity Convenience: editing, printing, compiling in parallel Dangers of process cooperation Data corruption, deadlocks, increased complexity Requires processes to synchronize their processing
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6 Purposes for IPC Purposes for IPC IPC allows processes to communicate and synchronize their actions without sharing the same address space Data Transfer Sharing Data Event notification Resource Sharing and Synchronization
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