Read input raw with timeout

kernel/include/terminal.hpp

@@ -52,10 +52,17 @@ struct virtual_terminal {
 
     /*!
      * \brief Reads non-canonical input in the given buffer
-     * \return the keyboard scan code
+     * \return the keyboard key code
      */
     size_t read_input_raw();
 
+    /*!
+     * \brief Reads non-canonical input in the given buffer, with
+     * a timeout
+     * \return the keyboard key code
+     */
+    size_t read_input_raw(size_t ms);
+
     void set_canonical(bool can);
 
     virtual_terminal(){}

kernel/src/terminal.cpp

@@ -134,6 +134,20 @@ size_t stdio::virtual_terminal::read_input_raw(){
     return raw_buffer.pop();
 }
 
+size_t stdio::virtual_terminal::read_input_raw(size_t ms){
+    if(raw_buffer.empty()){
+        if(!ms){
+            return static_cast<size_t>(keycode::INVALID);
+        }
+
+        if(!input_queue.sleep(ms)){
+            return static_cast<size_t>(keycode::INVALID);
+        }
+    }
+
+    return raw_buffer.pop();
+}
+
 void stdio::virtual_terminal::set_canonical(bool can){
     logging::logf(logging::log_level::TRACE, "Switched terminal %u canonical mode from %u to %u\n", id, uint64_t(canonical), uint64_t(canonical));