Header files adjustment

(MQTT changes split from original commit - @projectgus.)

examples/cpp_01_tasks/main.cpp

@@ -95,9 +95,9 @@ esp_open_rtos::thread::queue_t<uint32_t> MyQueue;
  */
 extern "C" void user_init(void)
 {
-	sdk_uart_div_modify(0, UART_CLK_FREQ / 115200);
+    sdk_uart_div_modify(0, UART_CLK_FREQ / 115200);
 	
-    MyQueue.create(10);
+    MyQueue.queue_create(10);
     
     task_1.queue = MyQueue;
     task_2.queue = MyQueue;

extras/cpp_support/include/mutex.hpp

@@ -46,14 +46,30 @@ public:
      */
     inline mutex_t()
     {
-        mutex = xSemaphoreCreateMutex();
+        mutex = 0;
+    }
+    /**
+     * 
+     * @return 
+     */
+    inline int mutex_create()
+    {
+        mutex = xSemaphoreCreateMutex();        
+        
+        if(mutex == NULL) {
+            return -1;
+        }
+        else {
+            return 0;
+        }
     }
     /**
      * 
      */
-    inline ~mutex_t()
+    inline void mutex_destroy()
     {
         vQueueDelete(mutex);
+        mutex = 0;
     }
     /**
      * 

extras/cpp_support/include/queue.hpp

@@ -56,7 +56,7 @@ public:
      * @param uxItemSize
      * @return 
      */
-    inline int create(unsigned portBASE_TYPE uxQueueLength)
+    inline int queue_create(unsigned portBASE_TYPE uxQueueLength)
     {
         queue = xQueueCreate(uxQueueLength, sizeof(Data));
         
@@ -69,11 +69,8 @@ public:
     }
     /**
      * 
-     * @param data
-     * @param ms
-     * @return 
      */
-    inline void destroy()
+    inline void queue_destroy()
     {
         vQueueDelete(queue);
         queue = 0;