#o2-nesbit.4
Author: Nick Nesbit
Operating Systems Project 4
Process Scheduling and OS Simulator

git repository: https://github.com/misterNez/o2-nesbit.4

For help: ./oss -h

To run: ./oss (default values set)

Options:
        -h		Display the help menu       

        -l [filename]   Set the name of the produced log file (default: nesbitP3.log)

        -t [integer]    Set the length of program timeout in seconds (default: 20)
     
     *Example: ./master -l newfile.log -t 30

     
     *Press Ctrl-C during execution to clean up resources and terminate all processes.

 
Basic function:
     oss.c:
        -Master file. Randomly spawns child processes and waits to receive messages from them.
        -Spawns new child processes as old ones terminate.
        -Max number of processes allowed at one time is 18.
        -Messages are stored in a message queue, which is also used to enforce mutual exclusion
        -Messages consist of a simulated clock, which is handled by a chunk of shared memory.
        -Maintains process control table, which is handled by a chunk of shared memory.
        -Controls concurrency using process queues.
        -Terminates after 3 real life seconds or after 100 children have been spawned.

     user.c:
        -User process file. Can either be a real-time process or noraml user process.
        -Has a small probability to terminate.
        -Can either be blocked or use up entire time slice at once.
        -Process is repeated until the total work is equal to a randomly generated duration period.
        -Sends message to master process and terminates after work load is complete.

     message.h:
        -Defines the data structure for the message queue.

     timer.h:
        -Defines the data structure for the shared memory timer.

     pct.h
        -Define the data structure for the process control table.

     Makefile:
        make: Builds two executables: oss, user
        make clean: Removes object files, log files, and execuatable files.

Difficulties:
      -Blocked queue is not implemented.