Advanced synchronization in operating system, Operating System

Assignment Help:

Recall that condition variables are synchronization primitives that enable threads to wait until a particular condition occurs.

Generalizing, the combination of locks and condition variables is sometimes called a monitor, which is sometimes incorporated into data structures in some languages (note that this termi- nology is not always used in a standardized way).

Previously,we discussed howto use condition variables and signals to implement a simple producer- consumer system. Looking at this system again, could we move the signal() call in enqueue() down below the unlock()?

dequeue()
lock(A)
while (queue empty)
wait(A, C)
remove_item()
unlock(A)
enqueue()
lock(A)
insert_item()
// used to signal here, inside lock
unlock(A)
signal(C) // now signal here, outside lock

Will this work? The answer is yes. It might not be as clean conceptually, but nothing bad will happen (verify this for yourself).


Related Discussions:- Advanced synchronization in operating system

Aggregate planning, Prepare a report that motivates alternatives reactive s...

Prepare a report that motivates alternatives reactive strategies that can be used by wind Mud clothing factory

What are the different file operations?, What are the different file operat...

What are the different file operations? Create : - Space for the file in the file system update directory table. Write : - file name and data to be written is

How many page faults take place in lru replacement, Q. Consider the subseq...

Q. Consider the subsequent page reference string: 1, 2, 3, 4, 2, 1, 5, 6, 2, 1, 2, 3, 7, 6, 3, 2, 1, 2, 3, 6. How many page faults would take place for the following replace

Why we need to use a while statement when using wait method, Q. The wait()...

Q. The wait() statement in every Java program examples was part of a while loop. Describe why you would always need to use a while statement when using wait() and why you would ne

What are the operations of processes, What are the operations of processes?...

What are the operations of processes? Process creation A process may create several new processes. The creating process is called as parent process, where as the new proce

Interval between time of submission and completion of job, Interval among t...

Interval among the time of submission and completion of the job is known as                    Interval among the time of submission and completion of the job is known as Turn

Sector sparing, What is sector sparing is proper definition

What is sector sparing is proper definition

What kind of operating system is windows xp, Q.  What kind of operating sy...

Q.  What kind of operating system is Windows XP? Describe two of its major features. Answer: A 32 or 64 bit pre-emptive multitasking operating system supporting multiple use

Managing outside communication, Problem: Managing Outside Communication...

Problem: Managing Outside Communication. a. What is the principal action we use when communicating through a web browser? b. Give an example of how to preaddress an email

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd