Can you explain how C++11 supports multithreading?
C++11 introduced several features for multithreading, including the <thread> library, which allows you to create and manage threads easily.
What are some key classes or functions in the <thread> library?
Key classes include std::thread for creating threads, std::mutex for mutual exclusion, and std::condition_variable for thread synchronization.
How do I use std::mutex to protect shared data?
You can use std::mutex to lock a section of code that accesses shared data. Wrap the access code in a lock_guard to ensure it is thread-safe.
Can you give me a simple code example?
Sure! Here's a basic example:
#include <iostream>
#include <thread>
#include <mutex>
std::mutex mtx;
int shared_data = 0;
void increment() {
std::lock_guard<std::mutex> lock(mtx);
++shared_data;
}
int main() {
std::thread t1(increment);
std::thread t2(increment);
t1.join();
t2.join();
std::cout << "Shared data: " << shared_data << std::endl;
}
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