Thursday, July 16, 2009
at
3:26 AM
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* Mechanism for processes to communicate and to synchronize their actions.
* Message system – processes communicate with each other without resorting to shared variables.n IPC facility provides two operations:
: send(message) –message size fixed or variable
: receive(message)
* If P and Q wish to communicate, they need to:
: establish a communication link between them
: exchange messages via send/receive
* Implementation of communication link
: physical (e.g., shared memory, hardware bus) considered later
: logical (e.g., logical properties) now
* Message system – processes communicate with each other without resorting to shared variables.n IPC facility provides two operations:
: send(message) –message size fixed or variable
: receive(message)
* If P and Q wish to communicate, they need to:
: establish a communication link between them
: exchange messages via send/receive
* Implementation of communication link
: physical (e.g., shared memory, hardware bus) considered later
: logical (e.g., logical properties) now
Posted by
Roger
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