Can you provide examples of deadlock-free C++ code?

Can you provide examples of deadlock-free C++ code?

Sure! One common approach to avoid deadlocks in C++ is to use a lock hierarchy. Here's a simple example:

Could you explain how the lock hierarchy works?

Absolutely! A lock hierarchy involves acquiring locks in a predefined order, which prevents circular wait conditions.

Can you show me a code snippet that demonstrates this?

Certainly! Here's a basic example:

std::mutex mutex1;
std::mutex mutex2;

void function1() {
    std::lock(mutex1, mutex2);
    std::lock_guard<std::mutex> lock1(mutex1, std::adopt_lock);
    std::lock_guard<std::mutex> lock2(mutex2, std::adopt_lock);
    // critical section
}

void function2() {
    std::lock(mutex1, mutex2);
    std::lock_guard<std::mutex> lock1(mutex1, std::adopt_lock);
    std::lock_guard<std::mutex> lock2(mutex2, std::adopt_lock);
    // critical section
}

This ensures that both functions acquire the locks in the same order.