read writers problem, C/C++ Programming

Assignment Help:
Readers Writers with Processes and Threads
Write two programs implementing ``reader pritority readers-writers synchronization'''' on files. One program will use processes, created with fork(), and synchronized with semaphores. The other program will use threads, created with pthread_create(), and synchronized with mutexes and conditions. In the following, the word "process" is used to describe either a process or thread, as appropriate.
Your program will create two readers and two writers. All four will access a common file, named ``SharedFile.'''' This file should contain a single number. The file should be created and given an initial value of 0 before the processes/threads are spawned.
The reader pseudocode:
repeat 20 times:
acquire read lock
read the number from SharedFile
release the read lock
print a message identifying the process, and the value read from SharedFile
sleep for a random period between 100 and 200 msec
The writer pseudocode:
repeat 20 times:
acquire write lock
read the number from SharedFile
increment it by a random value between 1 and 6
write the new value to SharedFile
release the write lock
print a message identifying the process, and the value written to SharedFile
sleep for a random period between 100 and 400 msec
Submit ONLY your C/C++ source code. Be sure to put your name and course in the comment header. The code must run on the "algebra and friends" machines. Use good programming style (comments, indentation, meaningful identifiers, etc.)

Related Discussions:- read writers problem

Pseudocode , Record separation problem Let us assume that a particular data...

Record separation problem Let us assume that a particular database program manages a simple mailing list which consists of one record for each person on the list, and a number of f

C assignment , 1. Create text a file with the name "myemail" that has a sin...

1. Create text a file with the name "myemail" that has a single line in it, consisting of your email address. Something like "[email protected]" (or your hotmail or gm

OpenGL configured environment, 1. Using Visual C++ and your OpenGL co...

1. Using Visual C++ and your OpenGL configured environment, write an application that displays a “unique” graphical scene that you designed and coded for this course. What yo

Asdas, Ask question #Miniasdasmum 100 words accepted#

Ask question #Miniasdasmum 100 words accepted#

Explain control flow, Control Flow The control flow statements are used...

Control Flow The control flow statements are used when it is needed that the flow of the program is to be changed after taking some decision. This control flow statement theref

Function returning object, F u nction Returning Object: This program ...

F u nction Returning Object: This program is like to the previous program except the function returns object.  The main rule to be remembered is the function returning obj

Inline functions, Inline functions, C++ provides inline functions to help r...

Inline functions, C++ provides inline functions to help reduce function_call overhead especially for small functions. The qualifier inline before function's return type in the f

Introduction of c, Discuss the saleint featuresand application of c

Discuss the saleint featuresand application of c

What is memory allocation, What is memory allocation? Memory Allocation...

What is memory allocation? Memory Allocation : It is the method of allocating memory storage to program in such that the program can be run.

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