Updated id handling for mutex and signal, sleep() for thread.

include/sta/rtos/thread.hpp

@@ -74,6 +74,14 @@ namespace sta
 		 */
 		RtosThread(const Handle & handle);
 
+		/**
+		 * @brief Sets the thread to BLOCKED for a given number of ticks. 
+		 * Other threads can run in the meantime.
+		 * 
+		 * @param ticks The number of ticks before setting the thread to READY again.
+		 */
+		void sleep(uint32_t ticks);
+
 		/**
 		 * @brief Send user notification flags to thread.
 		 *