Module 3: Concurrency

Goroutines, channels, select, synchronization Go's concurrency model from basics to production patterns.

Topics

#	Topic	Source	Key Concepts
1	Goroutines	src/03_concurrency/01_goroutines/main.go	go keyword, lightweight threads, WaitGroup
2	Channels Basics	src/03_concurrency/02_channels_basics/main.go	Buffered/unbuffered, send/receive, closing
3	Select Statement	src/03_concurrency/03_select_statement/main.go	Multiplexing, timeout, default case
4	Channel Patterns	src/03_concurrency/04_channel_patterns/main.go	Pipeline, fan-out, done channel
5	Mutexes & Atomics	src/03_concurrency/05_mutexes_atomics/main.go	sync.Mutex, RWMutex, atomic operations
6	Context	src/03_concurrency/06_context/main.go	WithCancel, WithTimeout, propagation
7	Worker Pool	src/03_concurrency/07_worker_pool/main.go	Bounded concurrency, job/result channels
8	Errgroup & Semaphore	src/03_concurrency/08_errgroup_semaphore/main.go	errgroup.Group, weighted semaphore

Run Any Example

go run src/03_concurrency/01_goroutines/main.go

What You'll Learn

• Goroutines cost ~2KB stack spawn thousands cheaply
• Channels for communication, mutexes for state protection
• Context for cancellation propagation across goroutine trees
• Worker pool pattern for bounded parallelism
• errgroup for structured concurrency with error collection