Lora: Remove singleton construction of LoRaWANStack

After changing LoRaMacCrypto as C++ class, we no longer have static variables
in LoRa implementation. Therefore singleton pattern can be removed.

features/lorawan/LoRaWANInterface.cpp

@@ -23,14 +23,9 @@
 
 using namespace events;
 
-inline LoRaWANStack& stk_obj()
-{
-    return LoRaWANStack::get_lorawan_stack();
-}
-
 LoRaWANInterface::LoRaWANInterface(LoRaRadio& radio)
 {
-    stk_obj().bind_radio_driver(radio);
+    _lw_stack.bind_radio_driver(radio);
 }
 
 LoRaWANInterface::~LoRaWANInterface()
@@ -39,95 +34,95 @@ LoRaWANInterface::~LoRaWANInterface()
 
 lorawan_status_t LoRaWANInterface::initialize(EventQueue *queue)
 {
-    return stk_obj().initialize_mac_layer(queue);
+    return _lw_stack.initialize_mac_layer(queue);
 }
 
 lorawan_status_t LoRaWANInterface::connect()
 {
-    return stk_obj().connect();
+    return _lw_stack.connect();
 }
 
 lorawan_status_t LoRaWANInterface::connect(const lorawan_connect_t &connect)
 {
-    return stk_obj().connect(connect);
+    return _lw_stack.connect(connect);
 }
 
 lorawan_status_t LoRaWANInterface::disconnect()
 {
-    return stk_obj().shutdown();
+    return _lw_stack.shutdown();
 }
 
 lorawan_status_t LoRaWANInterface::add_link_check_request()
 {
-    return stk_obj().set_link_check_request();
+    return _lw_stack.set_link_check_request();
 }
 
 void LoRaWANInterface::remove_link_check_request()
 {
-    stk_obj().remove_link_check_request();
+    _lw_stack.remove_link_check_request();
 }
 
 lorawan_status_t LoRaWANInterface::set_datarate(uint8_t data_rate)
 {
-    return stk_obj().set_channel_data_rate(data_rate);
+    return _lw_stack.set_channel_data_rate(data_rate);
 }
 
 lorawan_status_t LoRaWANInterface::set_confirmed_msg_retries(uint8_t count)
 {
-    return stk_obj().set_confirmed_msg_retry(count);
+    return _lw_stack.set_confirmed_msg_retry(count);
 }
 
 lorawan_status_t LoRaWANInterface::enable_adaptive_datarate()
 {
-    return stk_obj().enable_adaptive_datarate(true);
+    return _lw_stack.enable_adaptive_datarate(true);
 }
 
 lorawan_status_t LoRaWANInterface::disable_adaptive_datarate()
 {
-    return stk_obj().enable_adaptive_datarate(false);
+    return _lw_stack.enable_adaptive_datarate(false);
 }
 
 lorawan_status_t LoRaWANInterface::set_channel_plan(const lorawan_channelplan_t &channel_plan)
 {
-    return stk_obj().add_channels(channel_plan);
+    return _lw_stack.add_channels(channel_plan);
 }
 
 lorawan_status_t LoRaWANInterface::get_channel_plan(lorawan_channelplan_t &channel_plan)
 {
-    return stk_obj().get_enabled_channels(channel_plan);
+    return _lw_stack.get_enabled_channels(channel_plan);
 }
 
 lorawan_status_t LoRaWANInterface::remove_channel(uint8_t id)
 {
-    return stk_obj().remove_a_channel(id);
+    return _lw_stack.remove_a_channel(id);
 }
 
 lorawan_status_t LoRaWANInterface::remove_channel_plan()
 {
-    return stk_obj().drop_channel_list();
+    return _lw_stack.drop_channel_list();
 }
 
 int16_t LoRaWANInterface::send(uint8_t port, const uint8_t* data, uint16_t length, int flags)
 {
-    return stk_obj().handle_tx(port, data, length, flags);
+    return _lw_stack.handle_tx(port, data, length, flags);
 }
 
 int16_t LoRaWANInterface::receive(uint8_t port, uint8_t* data, uint16_t length, int flags)
 {
-    return stk_obj().handle_rx(data, length, port, flags, true);
+    return _lw_stack.handle_rx(data, length, port, flags, true);
 }
 
 int16_t LoRaWANInterface::receive(uint8_t* data, uint16_t length, uint8_t& port, int& flags)
 {
-    return stk_obj().handle_rx(data, length, port, flags, false);
+    return _lw_stack.handle_rx(data, length, port, flags, false);
 }
 
 lorawan_status_t LoRaWANInterface::add_app_callbacks(lorawan_app_callbacks_t *callbacks)
 {
-    return stk_obj().set_lora_callbacks(callbacks);
+    return _lw_stack.set_lora_callbacks(callbacks);
 }
 
 lorawan_status_t LoRaWANInterface::set_device_class(const device_class_t device_class)
 {
-    return stk_obj().set_device_class(device_class);
+    return _lw_stack.set_device_class(device_class);
 }

features/lorawan/LoRaWANInterface.h

@@ -434,6 +434,9 @@ public:
      *                          or other negative error code if request failed.
      */
     virtual lorawan_status_t set_device_class(const device_class_t device_class);
+
+private:
+    LoRaWANStack _lw_stack;
 };
 
 #endif /* LORAWANINTERFACE_H_ */

features/lorawan/LoRaWANStack.cpp

@@ -103,19 +103,9 @@ LoRaWANStack::LoRaWANStack()
      LoRaMacPrimitives.mlme_indication  = callback(this, &LoRaWANStack::mlme_indication_handler);
 }
 
-LoRaWANStack::~LoRaWANStack()
-{
-}
-
 /*****************************************************************************
  * Public member functions                                                   *
  ****************************************************************************/
-LoRaWANStack& LoRaWANStack::get_lorawan_stack()
-{
-    static LoRaWANStack _lw_stack;
-    return _lw_stack;
-}
-
 void LoRaWANStack::bind_radio_driver(LoRaRadio& radio)
 {
     _loramac.bind_radio_driver(radio);

features/lorawan/LoRaWANStack.h

@@ -70,7 +70,7 @@ private:
     } device_states_t;
 
 public:
-    static LoRaWANStack& get_lorawan_stack();
+    LoRaWANStack();
 
     /** Binds radio driver to PHY layer.
      *
@@ -396,9 +396,6 @@ public:
     lorawan_status_t set_device_class(const device_class_t& device_class);
 
 private:
-    LoRaWANStack();
-    ~LoRaWANStack();
-
     /**
      * Checks if the user provided port is valid or not
      */
@@ -465,7 +462,6 @@ private:
     void send_automatic_uplink_message(const uint8_t port);
 
 private:
-
     LoRaMac _loramac;
     loramac_primitives_t LoRaMacPrimitives;