Скачать или смотреть DAY 0 — Sleeping Barber Problem in Go | Concurrency Without Mutexes (Live Walkthrough)

Today is DAY 0 — and we’re starting with the classic Sleeping Barber dilemma, a famous concurrency problem that shows what happens when multiple processes compete for limited resources.

We’ll build the barbershop model step-by-step:

limited barbers

limited seats in the waiting room

customers arriving over time

shop closing rules

barbers sleeping when there’s no work

We’ll simulate the exact behaviors:

if there are no customers, the barber sleeps

customers wake the barber when they arrive

customers leave if all waiting chairs are full

barbers check the waiting room after each haircut

shop stops accepting customers at closing time

barbers only leave after all customers are done

The key lesson:

👉 We’ll solve it in Go using goroutines and channels — without mutexes — and explain why that works.

What you’ll learn:

modeling OS scheduling problems

designing safe queues and workers

avoiding race conditions and deadlocks

practical Go concurrency patterns you can reuse
No shortcuts, no copy-paste — just clear reasoning and real problem-solving.

Language: Go
Level: Beginner → Intermediate concurrency

Keywords: sleeping barber problem, golang concurrency, goroutines, channels, synchronization, operating systems problems, race conditions, producer consumer, Go tutorial, concurrency without mutexes, coding live