This project simulates a simplified Operating System Scheduler in C, incorporating process management, memory allocation, scheduling algorithms, and mutex-based synchronization. It includes a real-time Graphical User Interface built using Raylib to visualize memory, processes, queues, and resource locks.

Milestone 2 focuses on:

• Creating and scheduling processes from program files.
• Implementing three scheduling strategies.
• Managing shared resource access through mutexes.
• Visualizing OS behavior through an interactive GUI.

• Parses and runs 3 custom programs:
  • Program_1.txt: Print numbers between two integers.
  • Program_2.txt: Write user input to a file.
  • Program_3.txt: Read and print file contents.
• Each program simulates a process with its own PCB and memory space.

• FCFS (First-Come First-Serve)
• Round Robin (with adjustable quantum)
• Multilevel Feedback Queue (MLFQ)
  • 4 priority levels
  • Dynamic time quantums: {1, 2, 4, 8}

• Fixed memory: 60 words
• Each process is allocated space for:
  • Instructions
  • 3 variables
  • PCB metadata

• Three critical resources:
  • userInput
  • userOutput
  • file
• Managed using semWait and semSignal
• Blocked queue implemented with priority unblocking

• Live visualization of:
  • System clock, current instruction
  • Ready & Blocked Queues
  • Memory status
  • Mutex holders & waitlists
  • Process states & priority

Check out our custom-built Raylib GUI that visualizes process scheduling, memory usage, and mutexes in real-time:

Checkout the GUI below

• C compiler (e.g. gcc)
• Raylib installed