feat: add thread pools

src/unlocker/proxy.h

@@ -3,6 +3,10 @@
 #include <thread>
 #include <atomic>
 #include <string>
+#include <vector>
+#include <queue>
+#include <mutex>
+#include <condition_variable>
 #include <openssl/ssl.h>
 #include <openssl/err.h>
 #include "ssl.h"
@@ -39,6 +43,11 @@ class Proxy
         std::thread _workerThread;
         std::atomic<bool> _running = false;
 
+        std::vector<std::thread> _poolThreads;
+        std::queue<SOCKET> _clientQueue;
+        std::mutex _queueMutex;
+        std::condition_variable _queueCond;
+
         CertManager _certManager;
         SSL_CTX* _clientCtx = nullptr;
 };