What is the difference between thread-safe and reentrant?

Can you explain the difference between thread-safe and reentrant functions?

Sure! A thread-safe function can be safely called by multiple threads at the same time without causing data corruption.

What about reentrant functions?

Reentrant functions can be interrupted in the middle of execution and safely called again ('re-entered') before the previous execution is complete.

So, are all thread-safe functions reentrant?

Not necessarily. While all reentrant functions are thread-safe, not all thread-safe functions are reentrant. It depends on how they manage shared resources.

Can you give an example of each?

Sure! A simple counter that uses a mutex is thread-safe but not reentrant. A function that only uses local variables is reentrant.