To wait for a std::jthread to finish, you can use the join() member function. This function blocks the current thread until the associated std::jthread has finished executing. Here’s an example:

#include <iostream>
#include <thread>

void myThreadFunction()
{
    // Simulating some work
    std::this_thread::sleep_for(std::chrono::seconds(3));
    std::cout << "Thread execution complete." << std::endl;
}

int main()
{
    std::jthread myThread(myThreadFunction); // Creating a std::jthread

    // Some other code here...

    myThread.join(); // Waiting for the thread to finish

    // Proceed with the rest of the program

    return 0;
}

In this code snippet, we have a myThreadFunction that is executed by a std::jthread created in the main function. After creating the thread, we can perform other tasks, knowing that the std::jthread will continue executing in the background.

To wait for the thread to finish, we call the join() function on the std::jthread object. This will block the main thread until the associated thread completes its execution. After the join() call, we can proceed with the rest of our program.

Remember, calling join() is important to ensure that the program doesn’t exit before the thread finishes, as that would lead to undefined behavior.

Make sure to handle any exceptions that might be thrown when using std::jthread to ensure proper cleanup.