User Space Library

This repository contains a user space library for you to use when testing your project kernel module. It contains a bunch of helper functions for registering, withdrawing, and yielding, as well as two user space applications that you can use to test your scheduler.

Adjusting Parameters

The library assumes that you are using the characters R, W, and Y for registering, withdrawing, and yielding, respectively. If you are using a different interface, then modify the corresponding macros in csse332_lib.h as follows

/* Change these values if you are using different characters */
#define REGISTER_CHAR 'R'
#define WITHDRAW_CHAR 'W'
#define YIELD_CHAR 'Y'

IMPORTANT NOTE: My library assumes that the format of your module is R, 1000 for registering process with process id of 1000 (Note the comma after the first character). You can adjust the code in csse332_lib.c to remove this comma, but I do recommend that you change your module format to accept this comma so that I can test things out easily when grading.

Usage

There are two applications in this repository, userapp and yieldapp. Take a look at the source code to figure out exactly what they do. Here is a quick summary:

• userapp: This application will run 50 iterations of doing some useless work, but will not call yield. Use this application to test whether your module preempts running process correctly.
• yieldapp: This application is identical to userapp except for the fact that it will yield execution after each iteration of the loop. Use this application to test if your module correctly implements the yield interface.