Junior — Middle

What techniques do you know for using locks or other mechanisms to prevent concurrent access to data?

sobes.tech AI

Answer from AI

Main techniques for preventing concurrent access to data in Go:

Mutex (sync.Mutex): locking a critical section so that only one goroutine can work with the data.

var mu sync.Mutex
mu.Lock()
// working with shared data
mu.Unlock()

RWMutex (sync.RWMutex): allows multiple readers to read data simultaneously but blocks writing.
Channels: passing data between goroutines, which avoids direct access to shared data.
Atomic operations (sync/atomic): for simple operations on variables without full locking.
sync.Once: for one-time initialization of data.

The choice of mechanism depends on the task: for simple mutual exclusion — Mutex, for separating reading and writing — RWMutex, for message passing — channels.

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