What is a read-write lock?

Can you explain what a read-write lock is?

A read-write lock is a synchronization mechanism that allows concurrent access for reading and exclusive access for writing.

How does it differ from a regular lock?

Unlike a regular lock, which allows only one thread to access a resource, a read-write lock allows multiple threads to read simultaneously.

When should I use a read-write lock?

You should use a read-write lock when you have a resource that is read frequently but written to infrequently, to improve performance.

Can you give an example of where it might be used?

Sure! A common example is in a database where many users read data but only a few update it.