The code contained within this directory is written by Jeremy Griffith.

DESCRIPTION: The code contained in this directory implements a solution to Assignment 4 in EECS 338 (Fall 2015)

HOW TO BUILD: 1. Navigate to the src directory using 'cd src' 2. Enter the command 'make' 3. If this fails, enter the command 'make clean' 4. Repeat step 2

HOW TO RUN: 1. Enter the command './as4' followed by an integer Ex. > ./as4 2 2. If the integer is within the range of test functions the program will execute 3. Otherwise, try a different integer

TESTING: The following tests exist in the testing directory: 1. All legal transactions 2. One illegal withdrawal followed by a compensating deposit 3. One illegal withdrawal followed by an inadequate deposit

NOTES: Unfortunately, this solution is not complete. Linked Lists are proving to be incredibly difficult to work with in shared memory. It seems that malloc does not play nice with shared memory due to the local heap address used when allocating the memory. As a result, this solution can end up with the case where a withdraw waits for any deposit before continuing. Of course, this means that withdraws can cause the balance to go negative.

Several solutions were attempted such as allocating all the space
needed in the parent process then initializing those nodes. An array
was also used instead of a linked list. It was difficult to trace
the issue regardless. It seems shmat needs to be used to create 
shared memory spaces for every node.

HOW TO BUILD: 1. Navigate to src 2. Run 'make'

HOW TO RUN: 1. Navigate to src 2. Run './as5' 3. If this fails, execute 'make clean' -> then run 'make'