concurrent-programming-with-go

What I will learn:

• How to use go routines
• How to use waitgroups and mutexes
• How to use channels

Concurrency and Parallelism

• Single Taslk
• Concurrency (multiple task)
• Parallelism (execute multiple task simultaneously)

Threads vs Goroutines

Thread	Goroutines
Have own execution stack	Have own execution stack
Fixed stack space(around 1 MB)	Variable stack space (starts @2 KB)
Managed by OS	Managed by Go runtime

Working with Goroutines

• Enable concurrent programming

The Sync Package (golang.org/pkg/sync/)

• Allow goroutines to coordinate their work

Challenges with Concurrency

• Coordinate tasks
  • Waitgroups
• Shared Memory
  • Mutexes

Waitgroups

A WaitGroup waits for a collection of goroutines to finish.

Mutexes

A mutual exclusion lock.

A tool to detect race conditions:

 go run --race .

• Sync.Mutex
• Sync.RWMutex

Channels

• Provide a safe way for goroutines to communicate