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Interprocess Communication

 

Processes executing concurrently in the OS may be either independent processes or cooperating processes.

  • A process is independent if it cannot affect or be affected by the other processes executing in the system. Any process that does not share data with any other process is independent.
  • A process is cooperating if it can affect or be affected by the other processes executing in the system. Clearly, any process that shares data with other processes is a cooperating process.

Shared-Memory Systems

Interprocess communication using shared memory requires communicating processes to establish a region of shared memory. Typically, a shared-memory region resides in the address space of the process creating the shared-memory segment.





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