'Sem wait' presentation slideshows

965 views • 79 slides

798 views • 79 slides

Threads

Threads. Process ID, process group ID, user ID, and group ID Environment Working directory. Program instructions Registers Stack Heap File descriptors Signal actions Shared libraries

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Using Semaphores

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W4118 Operating Systems

W4118 Operating Systems. Instructor: Junfeng Yang. Logistics. Homework 2 due time: 3:09 pm this Thursday (one hour before class) Submit everything electronically at courseworks, including written assignment. Last lecture. Synchronization Layered approach to synchronization

316 views • 31 slides

Concurrent Object-Oriented Programming

Concurrent Object-Oriented Programming. Arnaud Bailly, Bertrand Meyer and Volkan Arslan. Lecture 3: Coordination Primitives. Coordination. Objects have a state . The set of available routines may depend on the current state. The Queue exhibits such a non-uniform service.

379 views • 29 slides

Operating Systems 5 - Concurrency

Operating Systems 5 - Concurrency. PIETER HARTEL. Concurrent programming : the potential for parallelism. Set of sequential processes competing for shared resources The parallelism is abstract: Omit unnecessary detail such as precise timing

399 views • 28 slides

Operating Systems 5 - Concurrency

Operating Systems 5 - Concurrency. PIETER HARTEL. Concurrent programming : the potential for parallelism. Set of sequential processes competing for shared resources The parallelism is abstract: Omit unnecessary detail such as precise timing

390 views • 28 slides

CS 345

CS 345. Tip #11: Saturated Addition. How do you add two numbers without overflow? Normally, when an addition overflows, it just drops back down to 0 and you're left with however much is left over after the overflow.

555 views • 24 slides

cosc 4740

cosc 4740. Implementing Threads & Semaphores. Review. User Thread Call special library functions thread.h and thread library Fast switching : switching among peer threads does not incur an interrupt to the kernel No short-term scheduler, no address change Only PC & stack-address changed.

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POSIX SEMAPHORES

POSIX SEMAPHORES. Mutex Reminder. mutex is a lock that only one thread can "hold" at any given time If a thread tries to acquire the lock while another thread "holds" it, that thread will be blocked until the lock is released

317 views • 11 slides

POSIX SEMAPHORES

POSIX SEMAPHORES. Mutex Reminder. mutex is a lock that only one thread can "hold" at any given time If a thread tries to acquire the lock while another thread "holds" it, that thread will be blocked until the lock is released

212 views • 11 slides