taken over freeRTOS changes

osal/FreeRTOS/TaskManagement.h

@@ -3,17 +3,16 @@
 
 #include "../../returnvalues/HasReturnvaluesIF.h"
 
-extern "C" {
 #include <freertos/FreeRTOS.h>
 #include <freertos/task.h>
-}
+
 #include <cstdint>
 
 /**
  * Architecture dependant portmacro.h function call.
  * Should be implemented in bsp.
  */
-extern void vRequestContextSwitchFromISR();
+extern "C" void vRequestContextSwitchFromISR();
 
 /*!
  * Used by functions to tell if they are being called from