What are the differences between thread-local storage and global storage in C++11?

What are the differences between thread-local storage and global storage in C++11?

In C++11, thread-local storage allows each thread to have its own instance of a variable, while global storage is shared across all threads.

Can you give me an example of when to use thread-local storage?

Sure! Use thread-local storage when you need to maintain state specific to a thread, like in a multi-threaded logging system.

What are the performance implications of using thread-local storage?

Thread-local storage can improve performance by reducing contention between threads, but it may introduce overhead in managing separate instances.

Are there any limitations to using thread-local storage?

Yes, thread-local storage can increase memory usage and may not be suitable for all scenarios, especially if threads are frequently created and destroyed.

How does thread-local storage compare to mutexes for thread safety?

Thread-local storage provides isolation between threads, while mutexes protect shared resources. They serve different purposes in thread safety.