feat(Core/Threading): replace ace threading (#4821)

src/common/Database/MySQLConnection.h

@@ -90,13 +90,13 @@ protected:
     {
         /// Tries to acquire lock. If lock is acquired by another thread
         /// the calling parent will just try another connection
-        return m_Mutex.tryacquire() != -1;
+        return m_Mutex.try_lock();
     }
 
     void Unlock()
     {
         /// Called by parent databasepool. Will let other threads access this connection
-        m_Mutex.release();
+        m_Mutex.unlock();
     }
 
     MYSQL* GetHandle()  { return m_Mysql; }
@@ -120,7 +120,7 @@ private:
     MYSQL*                m_Mysql;                      //! MySQL Handle.
     MySQLConnectionInfo&  m_connectionInfo;             //! Connection info (used for logging)
     ConnectionFlags       m_connectionFlags;            //! Connection flags (for preparing relevant statements)
-    ACE_Thread_Mutex      m_Mutex;
+    std::mutex            m_Mutex;
 
     MySQLConnection(MySQLConnection const& right) = delete;
     MySQLConnection& operator=(MySQLConnection const& right) = delete;