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Multithreading

Multithreading ek programming concept hai jisme ek single process ke andar multiple threads of…

Overview

Multithreading — Quick Facts

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Property: Detail

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Full Name: Multithreading (Concurrent…

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Also Known As: Multi-threaded Programming,…

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Category: Programming Concept / Software…

Topic 1

Infobox

📚 | Property | Detail | |---|---| | Full Name | Multithreading (Concurrent Programming) | |…

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Etymology aur History

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Mainframe operating systems me…

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IBM OS/360 me subtask facility —…

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Theoretical foundation: concurrent…

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Unix ne heavy process model follow…

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Thread Basics

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Thread ID: Unique identifier

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Program Counter (PC): Current…

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Stack: Function calls, local…

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Register Set: CPU register values…

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Thread vs Process

⭐ | Aspect | Process | Thread | |---|---|---| | Address Space | Own (isolated) | Shared…

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Thread Lifecycle

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New → Runnable: start() call…

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Runnable → Running: Scheduler…

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Running → Runnable: Time quantum…

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Running → Blocked: Lock wait, I/O…

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Thread Lifecycle Diagram

✨ `mermaid stateDiagram-v2 [*] --> New: Thread Created New --> Runnable: start() Runnable…

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Threading Models

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Threading completely user-space…

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OS ko threads ka pata hi nahi — OS…

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Thread scheduling user-space…

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Thread creation/switching…

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Thread Synchronization

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Binary lock — ek time par sirf ek…

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Thread lock acquire karta hai →…

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Doosre threads wait karte hain jab…

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Simple aur most commonly used…

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Synchronization Primitives Comparison

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Thread Safety

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Best approach — agar object change…

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Functional programming is…

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Critical sections ko lock karo

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Trade-off: safety vs performance…

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Common Concurrency Problems

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Data race: Two threads…

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Check-then-act: Thread condition…

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Proper synchronization (mutex/lock…

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Atomic operations for simple…

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Multithreading in Popular Languages

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Threading Model: One-to-one…

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API: Thread class, Runnable…

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Synchronization: synchronized…

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Concurrent Collections:…

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Performance Considerations

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OS thread: Typically 50-100…

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Green thread/goroutine: ~1…

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Virtual thread (Java): ~1…

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Optimal threads ≈ Number of CPU…

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Thread Pool Pattern

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No creation overhead per task:…

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Controlled resource usage: Maximum…

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Queuing: Tasks queue me wait karte…

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Graceful degradation: Overload me…

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Real-World Use Cases

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Classical model: Thread per…

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Har incoming HTTP request ek…

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Thread request process kare —…

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problem: 10K+ concurrent…

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Anti-patterns aur Common Mistakes

🚀 Anti-pattern 1: Thread Per Task (Unbounded) Har task ke liye new thread create karna —…

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Modern Alternatives to Traditional Multithreading

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Single thread (ya few threads) par…

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Compiler callback chains generate…

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C#, JavaScript, Python, Rust me…

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Best for I/O-bound work, not…

Comparison

Thread vs Process

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Address Space: Own (isolated)

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Creation Cost: High (fork + memory…

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Context Switch Cost: High (page table…

Comparison

Synchronization Primitives Comparison

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Mutex: Yes (sleep)

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Semaphore: Yes (sleep)

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Monitor: Yes (sleep)

Diagram

Visual Flow

📊 Diagram visualization — details in narration

Quiz — Question 1

Multithreading ka sabse sahi definition kya hai?

Quick Quiz

Quiz — Question 2

Multithreading ka 'Full Name' kya hai?

Complete! 🎉

Multithreading Complete!

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Multithreading Complete

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