CSE 531 – Distributed and Multiprocessor Operating Systems
Fall 2009
Project #3
Due Date: Nov 18th

Groups:

Please do the project in groups of 2. Online students can choose not to form groups.

Overview:

For this project you are to write build a module that does message passing via ports.

Step 1:

Declare a port. A port is something that contains N messages, make N=10. There would be semaphores associated with the port, for controlling synchronization. The port “contains” messages hence a port may be a pointer to a Q of messages, or an array of messages.

Declare a message type. For simplicity, a message is an array of 10 integers.

Declare a set (array of ports). The ports are numberered 0 to 99.

Step 2:

Implement the routines

Send (with appropriate arguments). The send is a “blocking” asynchronous send, that is it places the message in the port and returns.

Receive (with appropriate arguments). The Receive is a “blocking” receive.

Put the code in msgs.h, and include sem.h in the file msgs.h

Step 3:

Test the message passing system by writing one (or more) servers and having several clients talk to the servers.

SUBMIT:

Your project must consist of 6 files:

1. TCB.h  (uses ucontext.h)

2. q.h   (includes TCB.h)

3. threads.h  (includes q.h)

4. sem.h (includes threads.h)

5. msgs.h (includes sem.h)

6. msgs_test.c – your test program.

(make sure the compile command, “gcc msgs_test.c” does the correct compilation).

All 5 files are to be ZIPPED into one zip or gzip file. The name of this file should reflect the name(s) of the people submitting (abbreviated, do not make it too long).

Subject MUST be “project 3”

Email the zip file to asu<underscore>pd<underscore>hw<underscore>proj at the place commonly known as Y!.