Priority-Based Real-Time Operating System (RTOS) Core

A lightweight, custom Cooperative Real-Time Operating System (RTOS) core engineered from scratch in ANSI C. This project demonstrates the fundamental concepts of embedded systems programming, including task scheduling, context management, and synchronization.

🧠 System Overview

This RTOS implements a Priority-Based Cooperative Scheduler. Unlike preemptive schedulers that interrupt tasks, this system relies on tasks yielding control, making it ideal for resource-constrained environments where deterministic behavior is required.

Key Components

• TCB (Thread Control Block): The heart of the task management, storing state, priority, and metadata for each thread.
• Round-Robin & Priority Scheduling: A selection engine that identifies and executes the highest-priority READY task.
• Synchronization Primitives:
  • Mutexes: Implements ownership-based locking for shared resource protection.
  • Semaphores: Implements a token-based system for signaling and resource counting.

📂 Project Tree

priority-rtos-core/
├── include/
│   └── rtos.h                  # System definitions, TCB structures, and API headers
├── src/
│   └── rtos.c                  # Scheduler logic, context switching, and sync primitives
├── tests/
│   └── main.c                  # Simulation of multi-tasking workloads with priority competition
└── RTOS_Core_Simulation.ipynb  # Google Colab environment for cloud-based compilation & execution