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

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

Thread-local storage (TLS) allows you to create variables that are unique to each thread in a C++11 program.

How do I declare a thread-local variable?

You can declare a thread-local variable using the thread_local keyword before the variable type, like this: thread_local int 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 instance of a variable.

Can you give an example of thread-local storage in action?

Sure! Here's a simple example:

#include <iostream>
#include <thread>

thread_local int counter = 0;

void incrementCounter() {
    ++counter;
    std::cout << "Counter: " << counter << " from thread " << std::this_thread::get_id() << '\n';
}

int main() {
    std::thread t1(incrementCounter);
    std::thread t2(incrementCounter);
    t1.join();
    t2.join();
    return 0;
}