Maintain legacy RTOS behavior before mbed-5

Fork of mbed-rtos by mbed official

Revision:
123:58563e6cba1e
Parent:
119:19af2d39a542
--- a/rtos/Semaphore.h	Wed Nov 09 12:22:14 2016 -0600
+++ b/rtos/Semaphore.h	Mon Nov 14 17:14:42 2016 -0600
@@ -26,6 +26,8 @@
 #include "cmsis_os.h"
 
 namespace rtos {
+/** \addtogroup rtos */
+/** @{*/
 
 /** The Semaphore class is used to manage and protect access to a set of shared resources. */
 class Semaphore {
@@ -58,3 +60,5 @@
 
 }
 #endif
+
+/** @}*/