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Show Bid Request

Producer-Consumer processes
Bid Request Id: 18749
Bookmark in my 'To Do' list
Posted by: CheatMode (4 ratings)
(Software buyer rating 10)
Non-action Ratio: Very Good - 16.67%
Buyer Security Verifications: Good
Approved on: Jun 10, 2002
8:32:47 PM EDT
Bidding Closes: Jun 12, 2002
8:35:37 PM EDT
Viewed (by coders): 242 times
Deadline: 6/13/2002
TIME EXPIRED
Phase:
100% of work completed and accepted. Coder has been paid.
Max Accepted Bid: Bidding is closed
Project Type: Personal Project / Homework Help
Bidding Type: Open Auction
Categories: C++ / C, UNIX
Enter chat room for this bid request
(0 active users at Sep 23, 2003 3:07:49 PM EDT)

Description:
This program should create two concurrent processes that will communicate between themselves with the help of shared memory and semaphores. The processes will be a producer and a consumer. The producer will produce items (e.g. integer numbers) and place them on a buffer (a queue perhaps?), which will exist on the shared memory. The consumer will remove items from the buffer and “consume” them. The queue will have a maximum capacity of 10 items.

Fork should be used to create the two processes. (parent process: producer, child process: consumer)
The shared memory should be created with shmget and will be deleted with shmdt.
Also for the shared memory part, the following commands should be used: shmop, shmat, shmctl, ipcrm, ipcs)
Semaphores will be used for the synchronization of the two processes (the commands sema_init, sema_destroy, sema_wait, sema_trywait and sema_post should be used).
In the attached .zip file there is a .pdf that might help with some of the commands that should be used and a sample code file that roughly shows how the code should look like.





Deliverables:
Complete and fully-functional working program(s) in executable form as well as complete source code of all work done.

Complete copyrights to all work purchased.


Platform:
It should compile on gcc and run in linux

Must be 100% finished and received by buyer on:
Jun 13, 2002 EDT
Deadline legal notes: All times are expressed in the time zone of the site EDT (UT - 5). If the buyer omitted a time, then the deadline is 11:59:59 PM EDT on the indicated date.

Special Conditions / Other:
Ofcourse when the buffer is full, the procducer should suspend itself and thus give time to the consumer in order to consume the items on the buffer. If the buffer is empty, the consumer should suspend itself and give time to the producer to produce more items.
In order to work on this project one must be familiar with the term "critical section" and its significance in a process. Therefore the following rules should be kept in order for the program to function properly:
1.The two processes must never be in critical sections at the same time.
2.A process that is not in a critical section will not be allowed to suspend the other process.
3.The maximum time that a process has to wait before entering a critical section must be defined.

Additional Files:
This bid request includes IMPORTANT additional attached files. Please download and read fully before bidding.



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See all rejected bids (and all comments)
Name   Bid Amount 
 
Date   Coder Rating  
This bid was accepted by the buyer!
SofterSoftware
(12 ratings)
in Toronto, Ontario
Canada
Bid id: 205,405
 
$25 (USD) Jun 10, 2002
10:17:58 PM EDT
 10
(Excellent)
   
I can do this for you no problem. I have done similar problems to this one a few times in the past. I will write code that is well commented and easy to follow. Check my ratings for references.
 
 
 
 
  There are 8 private replies to/from SofterSoftware. Click here to view them.
 




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