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Thread Synchronization Simulator

The Thread Synchronization Simulator is an interactive educational tool that helps you understand concurrent programming through visual demonstrations of classic synchronization algorithms.

Interactive Learning

Step through thread execution one instruction at a time or run in automatic mode

Visual Feedback

Watch threads compete for resources with real-time state visualization

Real-World Scenarios

Learn through practical examples like banking, printing, and construction

Seven Algorithms

Explore mutex, semaphores, monitors, barriers, and more

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What You’ll Learn

This simulator demonstrates how threads coordinate access to shared resources using synchronization primitives. Each algorithm is paired with a real-world scenario to make abstract concepts concrete.
Multiple threads compete to access a shared bank account balance using mutual exclusion locks.
Jobs wait for available printers from a limited pool using counting semaphores.
Customers wait for food while a chef signals when meals are ready.
Readers can access simultaneously while writers need exclusive access to the catalog.
All runners must reach the checkpoint before any can continue to the finish line.
Construction tasks have dependencies that must complete before the next stage begins.
Two robots share a critical station using flags and turn-based coordination.

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Key Features

Step-by-Step Execution

Execute one instruction at a time to understand exactly what happens at each step

Execution Timeline

Track the complete history of thread actions with detailed event logs

Queue Visualization

See which threads are blocked and waiting in FIFO order

State Inspection

Monitor shared resource state including locks, semaphore counts, and data values

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Getting Started

Ready to explore thread synchronization? Start with our quickstart guide to understand the simulator interface and run your first scenario.

Quickstart Guide

Run your first synchronization simulation in minutes

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Architecture Overview

The simulator is built with a clean separation between the execution engine and visualization layer. Learn more about how it works:

Architecture

Understand the simulator’s internal design