What are some use cases for C++ std::async?

What are some use cases for C++ std::async?

C++ std::async is useful for running tasks asynchronously. Common use cases include parallel computations, I/O operations, and improving responsiveness in applications.

Can you give me an example of using std::async in a program?

Sure! Here's a simple example:

#include <iostream>
#include <future>

int compute(int x) {
    return x * x;
}

int main() {
    std::future<int> result = std::async(std::launch::async, compute, 10);
    std::cout << "Result: " << result.get() << std::endl;
    return 0;
}

What are the benefits of using std::async over traditional threading?

Using std::async simplifies thread management, automatically handles thread creation, and provides a future object for result retrieval, making it easier to write concurrent code.

Are there any drawbacks to using std::async?

Yes, potential drawbacks include overhead from managing futures, possible exceptions if tasks are not handled properly, and less control over thread management compared to manual threading.