SWEN90004 Modelling Complex Software Systems Java threads; mutual exclusion Artem Polyvyanyy, Nic Geard Lecture Con.02 Semester 1, 2021 ©The University of Melbourne SWEN90004 (2021) Java threads; mutual exclusion 1 / 25 How is everyone doing? SWEN90004 (2021) Java threads; mutual exclusion 2 / 25 The mutual exclusion (Mutex) problem N processes (here, N = 2) […]
CS计算机代考程序代写 algorithm Java concurrency SWEN90004 Read More »
School of Computing and Information Systems SWEN90004 Modelling Complex Software Systems Concurrency Workshop 2 solutions The exercises 1. This sample solution uses a boolean variable, waiting, which keeps track of whether there is a thread waiting (as such, it is initialised to false). Initially, and whenever waiting is false, the first thread that calls synch
SWEN90004 Modelling Complex Software Systems Concurrent programming languages Artem Polyvyanyy, Nic Geard Lecture Con.11 Semester 1, 2021 c The University of Melbourne SWEN90004 (2021) Programming languages 1 / 25 Concurrency via shared memory Processes (threads) interact with one another (communicate) via reading and writing to shared memory. It is therefore critical to protect the integrity
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SWEN90004 Modelling Complex Software Systems Concurrency in FSP Artem Polyvyanyy, Nic Geard Lecture Con.06 Semester 1, 2021 ⃝c The University of Melbourne SWEN90004 (2021) Concurrency in FSP 1 / 26 Introduction In the last lecture we used FSP to model individual processes. However, FSP is not usually used for modelling individual processes. Its power comes
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SWEN90004 Modelling Complex Software Systems Semaphores; Java summary Artem Polyvyanyy, Nic Geard Lecture Con.04 Semester 1, 2021 ⃝c The University of Melbourne SWEN90004 (2021) Semaphores; Java summary 1 / 24 Java has lightweight monitors A lock is associated with every object. To execute a synchronized method, a process must first acquire the lock for that
CS计算机代考程序代写 compiler algorithm Java cache concurrency SWEN90004 Read More »
SWEN90004 Modelling Complex Software Systems Checking liveness in FSP Artem Polyvyanyy, Nic Geard Lecture Con.09 Semester 1, 2021 ⃝c The University of Melbourne SWEN90004 (2021) Checking liveness in FSP 1 / 29 Introduction In the last lecture we studied the use of LTSA for checking safety properties. Now we turn to liveness. SWEN90004 (2021) Checking
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SWEN90004 Modelling Complex Software Systems Model checking with temporal logic Artem Polyvyanyy, Nic Geard Lecture Con.10 Semester 1, 2021 ⃝c The University of Melbourne SWEN90004 (2021) Model checking with temporal logic 1 / 34 Introduction In lectures the last two lectures, we saw how to specify properties that hold true for every execution of a
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SWEN90004 Modelling Complex Software Systems Introduction Artem Polyvyanyy, Nic Geard Lecture Introduction Semester 1, 2021 ©The University of Melbourne SWEN90004 (2021) Introduction 1 / 14 Modelling Complex Software Systems What is a system? SWEN90004 (2021) Introduction 2 / 14 Modelling Complex Software Systems What is a software system? SWEN90004 (2021) Introduction 3 / 14 Modelling
Department of Computing and Information Systems SWEN90004 Modelling Complex Software Systems Some Concurrency Workshop 4 solutions The exercises 1. The two LTS models are shown below: Different sequence Note that the model TWO allows a user to release a resource that has not been acquired, whereas ONE does not. Therefore, a trace that is in
Department of Computing and Information Systems SWEN90004 Modelling Complex Software Systems Some Concurrency Workshop 6 solutions The exercises 1. (a) The following assertion says that processes a and b will both eventually acquire the resource: assert EVENTUALLY_ACQUIRE = (a.acquire && b.acquire) To check this with LTSA, do Check ¡ú LTL Property ¡ú EVENTUALLY ACQUIRE, which