What are the differences between mutexes and spinlocks in C++14?

What are the differences between mutexes and spinlocks in C++14?

Mutexes are blocking synchronization primitives, while spinlocks are non-blocking and busy-wait. Mutexes yield control to other threads, whereas spinlocks keep checking until they acquire the lock.

When should I use a mutex instead of a spinlock?

Use a mutex when you expect threads to be blocked for a longer time, as it allows other threads to run. Spinlocks are better for short, quick operations where the wait time is minimal.

Are there any performance considerations I should be aware of?

Yes, spinlocks can be more efficient for short critical sections due to lower overhead, but they can waste CPU cycles if the lock is held for longer periods. Mutexes are generally safer for longer waits.

Can you give an example of when to use each?

Sure! Use a mutex for protecting shared resources in a database transaction. Use a spinlock for a quick update to a shared counter where contention is low.