Here comes he RunT!

Sources/thread_pool.h

@@ -0,0 +1,79 @@
+#pragma once
+
+#include <vector>
+#include <queue>
+#include <thread>
+#include <mutex>
+#include <condition_variable>
+#include <functional>
+#include <atomic>
+#include <future>
+
+class ThreadPool {
+private:
+    std::vector<std::thread> workers_;
+    std::queue<std::function<void()>> tasks_;
+    std::mutex queue_mutex_;
+    std::condition_variable condition_;
+    std::atomic<bool> stop_{false};
+    
+public:
+    explicit ThreadPool(size_t num_threads = std::thread::hardware_concurrency()) {
+        for (size_t i = 0; i < num_threads; ++i) {
+            workers_.emplace_back([this] {
+                for (;;) {
+                    std::function<void()> task;
+                    
+                    {
+                        std::unique_lock<std::mutex> lock(queue_mutex_);
+                        condition_.wait(lock, [this] { return stop_ || !tasks_.empty(); });
+                        
+                        if (stop_ && tasks_.empty()) return;
+                        
+                        task = std::move(tasks_.front());
+                        tasks_.pop();
+                    }
+                    
+                    task();
+                }
+            });
+        }
+    }
+    
+    template<class F, class... Args>
+    auto enqueue(F&& f, Args&&... args) -> std::future<typename std::invoke_result<F, Args...>::type> {
+        using return_type = typename std::invoke_result<F, Args...>::type;
+        
+        auto task = std::make_shared<std::packaged_task<return_type()>>(
+            std::bind(std::forward<F>(f), std::forward<Args>(args)...)
+        );
+        
+        std::future<return_type> res = task->get_future();
+        
+        {
+            std::unique_lock<std::mutex> lock(queue_mutex_);
+            if (stop_) {
+                throw std::runtime_error("enqueue on stopped ThreadPool");
+            }
+            
+            tasks_.emplace([task](){ (*task)(); });
+        }
+        
+        condition_.notify_one();
+        return res;
+    }
+    
+    size_t pending_tasks() const {
+        std::lock_guard<std::mutex> lock(const_cast<std::mutex&>(queue_mutex_));
+        return tasks_.size();
+    }
+    
+    ~ThreadPool() {
+        stop_ = true;
+        condition_.notify_all();
+        
+        for (std::thread& worker : workers_) {
+            worker.join();
+        }
+    }
+};