How can I implement a thread pool using Boost.Asio?

How can I implement a thread pool using Boost.Asio?

To implement a thread pool with Boost.Asio, you can use the boost::asio::thread_pool class. This allows you to manage a pool of threads that can execute tasks concurrently.

Can you show me a simple code example?

Sure! Here's a basic example:

#include <boost/asio.hpp>
#include <iostream>

void print_message(int id) {
    std::cout << "Task " << id << " is running." << std::endl;
}

int main() {
    boost::asio::thread_pool pool(4); // Create a thread pool with 4 threads

    for (int i = 0; i < 10; ++i) {
        boost::asio::post(pool, [i]() { print_message(i); });
    }

    pool.join(); // Wait for all tasks to finish
    return 0;
}

This code creates a thread pool and posts 10 tasks to it.

What if I want to control the number of threads dynamically?

You can manage the number of threads by creating a custom thread pool class that allows you to add or remove threads based on your needs. You can use boost::asio::executor_work_guard to keep the pool active while managing the tasks.