What are advanced mutex techniques in C++?

What are advanced mutex techniques in C++?

Advanced mutex techniques in C++ include using std::unique_lock, std::shared_mutex, and condition variables for better thread management.

Can you explain how std::unique_lock works?

std::unique_lock is a smart lock that provides more flexibility than std::lock_guard. It allows for deferred locking, timed locking, and manual unlocking.

What is the difference between std::mutex and std::shared_mutex?

std::mutex allows exclusive access to a resource, while std::shared_mutex allows multiple threads to read or one thread to write, improving concurrency.

How do I use condition variables with mutexes?

Condition variables are used with mutexes to block a thread until a particular condition is met, allowing for efficient thread synchronization.

Can you provide a code example of using std::shared_mutex?

Sure! Here's a simple example:

#include <shared_mutex>
#include <thread>
#include <iostream>

std::shared_mutex mutex;
int shared_data = 0;

void reader() {
    std::shared_lock<std::shared_mutex> lock(mutex);
    std::cout << "Reading data: " << shared_data << std::endl;
}

void writer() {
    std::unique_lock<std::shared_mutex> lock(mutex);
    shared_data++;
    std::cout << "Writing data: " << shared_data << std::endl;
}

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