Transitioning from Sequential Programming to Concurrent Programming in the Ticket Sale Example
By Jerry Cain - Stanford
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663
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Lecture Description
Transitioning from Sequential Programming to Concurrent Programming in the Ticket Sale Example, Problems with the Sequential Model, Threading Interface, Rewriting the Ticket Example to Use It, Adding a Randomized Threadsleep Call to the Threads to Make the Time Slices Used by the Different Threads Less Uniform, Sample Output of Our Ticket Threads, How a Thread Can be Interrupted in the Middle of a Nonatomic Operation, How Multithreading Can Drastically Speed Up the RSS News Reader by Allowing Some Feeds to be Loaded While the Other Feeds Are Blocked, Allowing Each of the Ticket Threads to Access A Global Pool of Tickets, Rather than Allocating 15 Tickets to Each Agent, How This Can Lead to Problems When Threads Attempt to Access the Shared Data Simultaneously, How We Can Prevent This from Happening By Enclosing the Critical Region within A Semaphore, the Semaphorewait And Semaphoresignal Functions, Modifying the Selltickets Function to Use the Semaphore to Protect the Shared Data, How Changing the initial Value of the Semaphore Can Create Deadlock or Allow Too Many Threads to Access the Shared Data At Once
Course Description
Topics include: Advanced memory management features of C and C++; the differences between imperative and object-oriented paradigms; the functional paradigm (using LISP) and concurrent programming (using C and C++); brief survey of other modern languages such as Python, Objective C, and C#. Prerequisites: Programming and problem solving at the Programming Abstractions level. Prospective students should know a reasonable amount of C++. You should be comfortable with arrays, pointers, references, classes, methods, dynamic memory allocation, recursion, linked lists, binary search trees, hashing, iterators, and function pointers. You should be able to write well-decomposed, easy-to-understand code, and understand the value that comes with good variable names, short function and method implementations, and thoughtful, articulate comments.
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