What is thread-local storage in C++11?

Can you explain what thread-local storage is in C++11?

Thread-local storage (TLS) allows you to create variables that are unique to each thread. In C++11, you can declare a variable as thread-local using the thread_local keyword.

How do I declare a thread-local variable?

You can declare a thread-local variable like this: thread_local int myVar;. Each thread will have its own instance of myVar.

What are the benefits of using thread-local storage?

The main benefits include avoiding data races and ensuring that each thread has its own copy of a variable, which can improve performance in multi-threaded applications.

Are there any limitations to thread-local storage?

Yes, thread-local storage can increase memory usage since each thread has its own copy of the variable. Also, it may not be suitable for all use cases, especially if you need to share data between threads.