#pragma once

#include "thread_pool.h"
#include <memory>
#include <mutex>

class GlobalThreadPool {
private:
    static std::unique_ptr<ThreadPool> instance_;
    static std::once_flag initialized_;
    
public:
    static ThreadPool& getInstance() {
        std::call_once(initialized_, []() {
            unsigned int hw_threads = std::thread::hardware_concurrency();
            size_t num_threads = hw_threads > 4 ? hw_threads / 2 : 2;
            instance_ = std::make_unique<ThreadPool>(num_threads);
        });
        return *instance_;
    }
    
    static void shutdown() {
        instance_.reset();
    }
};