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Show Bid Request

This program is to show the use of multithreading and to implement message passing through shared memory
Bid Request Id: 8862
Bookmark in my 'To Do' list
Posted by: Shannu (6 ratings)
(Software buyer rating 10)
Non-action Ratio: Above Average - 42.86%
Buyer Security Verifications: Unverified
Approved on: Feb 15, 2002
12:07:17 AM EDT
Bidding Closes: Feb 17, 2002
12:12:42 AM EDT
Viewed (by coders): 662 times
Deadline: 2/20/2002
TIME EXPIRED
Phase:
100% of work was accepted by buyer. Coder account has been credited.
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 12, 2003 10:50:12 PM EDT)

Description:

This program is to show the use of multithreading and to implement message passing through shared memory. The code in each thread that accesses the shared memory is a critical section, and you need to avoid race condition using the pthread library functions - pthread_mutex_lock and pthread_mutex_unlock -

Write a program with three threads - reader, modifier, and printer. The reader thread reads an input file, one character at a time, and passes on the character to the modifier through a common buffer that can hold only one character. The reader should not send another character until the previous character has been taken by the modifier.

The modifier thread receives the character from the common buffer with the reader. If the character is a, it sends the character % to the printer thread. If the character received is b it sends two stars (*) to the printer - one at a time. If the character received is c, then it sends three #&'s to the printer - one at a time. All other characters are sent as they are received. Again the common buffer between the modifier thread and the printer thread can hold only one character, and the same restrictions as above also apply in this case.

Finally, the printer thread prints the character received from the modifier thread - one character at a time.

Use file1 of the previous project as input to this program also.



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

"WITH COMMENTS"

Complete copyrights to all work purchased.


Platform:
UNIX

Must be 100% finished and received by buyer on:
Feb 20, 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:
Dead line is 20th Feb. 1.00 pm
US central time.

CODE with COMMENTS.

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



Remember that contacting the other party outside of the site (by email, phone, etc.) on all business projects < $500 (before the buyer's money is escrowed) is a violation of both the software buyer and seller agreements. We monitor all site activity for such violations and can instantly expel transgressers on the spot, so we thank you in advance for your cooperation. If you notice a violation please help out the site and report it. Thanks for your help.
 
Bidding/Comments:
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Rent a Coder is a closed auction, so coders can only see their own bids and comments. Buyers can view every posting made on their bid requests.

See all rejected bids (and all comments)
Name   Bid Amount 
 
Date   Coder Rating  
This bid was accepted by the buyer!
Technology i2i
(7 ratings)
in Cape Town, Western Cape
South Africa
Bid id: 104,695
 
$10 (USD) Feb 15, 2002
3:42:49 PM EDT
 7.14
(Good)
   
Would be glad to work with you again. You will receive the fully working source code [according to spec] with comments, the executable and the output file before 20th Feb. 1.00 pm US central time.

Thanks

The i2i Team

 




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