Here comes he RunT!

Sources/global_thread_pool.h

@@ -0,0 +1,25 @@
+#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();
+    }
+};