Mastering Concurrency in Go/

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Mutex

Mutex

Let's learn about Mutex in Go and use it to solve race conditions.

We'll cover the following...

A mutex, or a mutual exclusion prevents other processes from entering a critical section of data while a process occupies it.

We import mutex from the sync package in Go. sync.mutex has two methods:

  • .Lock() : acquires/holds the lock
  • .Unlock(): releases the lock
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var myMutex sync.Mutex
myMutex.Lock()
//critical section 
myMutex.Unlock()

Critical Section

Let’s continue on our example of deposit/withdraw balance from the lesson on race condition. Deposit and withdraw should not happen at the same time, i.e., the variable balance should ...