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#Communicating sequential processes mod

This is allowed to happen when the buffer is not empty and the consumer has sent the more message:outThe second deals with sending output to the consumer.

#Communicating sequential processes mod

This is allowed to happen, when the producer has sent something and there is space available in the buffer:inThe first deals with receiving input from the producer.Communicating Sequential Processes (CSP) COP 4020 - Summer 2006 Utilizes 2 counters: One for recording number of items it has received, one for recording number of items it has sent.The buffer has a size of 10 (0 through 9 spaces).When waiting for input in a guard, the process does not block! The guard simply evaluates as neither true nor false until it receives the input (it will then evaluate as true).The buffer uses non-determinism to choose between accepting input or sending output when both options are equally valid.

The buffer is where the magic happens.

Ex: x:=e ] CSP: Shared Buffer Communicating Sequential Processes (CSP) COP 4020 - Summer 2006.

Multiple communicating processes can be present in both a single machine and across multiple machines P1 P2 P3 Communicating Sequential Processes (CSP) COP 4020 - Summer 2006.

Something similar to input and output can be used to allow processes to communicate.

An implementation of CSP (OCAM) was used in the T9000 Transputer Communicating Sequential Processes (CSP) COP 4020 - Summer 2006.

CSP is a formal language for describing concurrent systems.

Communicating Sequential Processes This Lecture is based on Peter Clayton’s Lectures on CSP Greg AllardThomas Welfley Communicating Sequential Processes (CSP) COP 4020 - Summer 2006