Intelligence Semantics

Communicating Process Architectures 2011: WoTUG-33 by P.H. Welch, A.T. Sampson, J.B. Pedersen, J. Kerridge, J.F.

By P.H. Welch, A.T. Sampson, J.B. Pedersen, J. Kerridge, J.F. Broenink, F.R.M. Barnes

This booklet is a suite of the papers awarded on the thirty third speaking method structure (CPA) convention, held on the collage of Limerick, eire, 19-22 June, 2011. It was once hosted by way of Lero, the Irish software program Engineering examine Centre, and co-located with FM 2011 (the seventeenth foreign Symposium on Formal Methods), SEW-34 (the thirty fourth Annual IEEE software program Engineering Workshop) and several other expert workshops and tutorials. those CPA complaints comprise the implications from wealthy seams of analysis protecting a few of the key matters in sleek machine technology, which all appear to problem concurrency in a single shape or one other nowadays. inside of, you'll find papers on concurrency types and their conception, concurrency pragmatics (the powerful use of multicores), language principles and implementation (for cellular methods, generalised varieties of choice), instruments to help verification and function, purposes (large scale simulation, robotics, internet servers), benchmarks (for clinical and dispensed computing) and, possibly most significantly, schooling. They mirror the expanding relevance of concurrency either to precise and deal with advanced difficulties in addition to to take advantage of available parallel hardware.IOS Press is a world technological know-how, technical and clinical writer of top quality books for lecturers, scientists, and pros in all fields. many of the components we put up in: -Biomedicine -Oncology -Artificial intelligence -Databases and data structures -Maritime engineering -Nanotechnology -Geoengineering -All features of physics -E-governance -E-commerce -The wisdom economic climate -Urban stories -Arms keep watch over -Understanding and responding to terrorism -Medical informatics -Computer Sciences

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Extra resources for Communicating Process Architectures 2011: WoTUG-33

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Friborg and B. Vinter / Verification of a Dynamic Channel Model Control flows in Promela can be defined using either if .. fi or do .. od constructs. The latter executes the former repeatedly until the break statement is executed. Listing 2 shows two examples of the constructs. The first where else is taken only when there is no other enabled guards and another where an always enabled condition might never be executed. Listing 2. Example of control flows in Promela. if : : (A == t r u e ) −> p r i n t f ( ”A i s t r u e , B i s unknown ” ) ; : : ( B == t r u e ) −> p r i n t f ( ”B i s t r u e , A i s unknown ” ) ; : : e l s e −> p r i n t f ( ”A and B a r e f a l s e ” ) ; fi do : : ( s k i p )−> p r i n t f ( ” I f A i s a l w a y s t r u e , t h e n t h i s may n e v e r p r i n t e d .

L o c k == 0 ) −> ch [ c h i d ] . l o c k = 1 ; } match ( c h i d ) ; ch [ c h i d ] . l o c k = 0 ; / * r e l e a s e c h a n n e l l o c k * / } inline remove write ( ch id ) { /* acquire channel lock */ a t o m i c { ( ch [ c h i d ] . l o c k == 0 ) −> ch [ c h i d ] . l o c k = 1 ; } } ch [ c h i d ] . l o c k = 0 ; / * r e l e a s e c h a n n e l l o c k * / When matching read and write requests on a channel we use the two-phase locking protocol where the locks of both involved processes are acquired before the system state is changed.

When declaring inline functions, the parameters in the parameter list have no types. The inline functions are exclusively used as a replace-pattern, when generating the complete model with a single body for each thread. All values passed to an inline function is pass-by-reference. There is no return construct in Promela, thus values must be returned by updating variables through the parameter list. M. Friborg and B. Vinter / Verification of a Dynamic Channel Model Control flows in Promela can be defined using either if ..

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