Added barrier pattern, thread yield and updated event API

include/sta/rtos/event.hpp

@@ -9,6 +9,10 @@
 #include <cmsis_os2.h>
 #include <sta/event.hpp>
 
+
+#define STA_EVENT_FLAGS_ALL 0xFFFFFFFFU
+
+
 namespace sta
 {
 	/**
@@ -25,12 +29,12 @@ namespace sta
 		/**
 		 * @brief Set given flags for the event.
 		 */
-		void set(uint32_t flags) override;
+		void set(uint32_t flags = STA_EVENT_FLAGS_ALL) override;
 
 		/**
 		 * @brief Clear given flags for the event.
 		 */
-		void clear(uint32_t flags) override;
+		void clear(uint32_t flags = STA_EVENT_FLAGS_ALL) override;
 
 		/**
 		 * @brief Get current flags for the event.
@@ -46,11 +50,11 @@ namespace sta
 		 * @param timeout Timeout in milliseconds.
 		 * @return Event flags before clearing or error code if highest bit set.
 		 */
-		uint32_t wait(uint32_t flags, uint32_t timeout = osWaitForever) override;
+		uint32_t wait(uint32_t flags = STA_EVENT_FLAGS_ALL, uint32_t timeout = osWaitForever) override;
 
 	private:
 		osEventFlagsId_t event_id;   /**< CMSIS RTOS2 Event Flag */
 	};
 } // namespace sta
 
-#endif // STA_RTOS_EVENT_HPP
+#endif // STA_RTOS_EVENT_HPP

include/sta/rtos/patterns/barrier.hpp

@@ -0,0 +1,31 @@
+/*
+ * barrier.hpp
+ *
+ *  Created on: Mar 16, 2024
+ *      Author: Dario
+ */
+
+#ifndef RTOS2_UTILS_STA_PATTERNS_BARRIER_HPP
+#define RTOS2_UTILS_STA_PATTERNS_BARRIER_HPP
+
+#include <sta/rtos/mutex.hpp>
+#include <sta/rtos/event.hpp>
+
+
+namespace sta
+{
+	class Barrier {
+	public:
+		Barrier(const char* name, uint8_t n_threads);
+
+		void wait();
+	private:
+		RtosMutex mutex_;
+		RtosEvent flag_;
+		const uint8_t n_threads_;
+		uint8_t n_entered_;
+		uint8_t n_left_;
+	};
+}  // namespace sta
+
+#endif /* RTOS2_UTILS_STA_PATTERNS_BARRIER_HPP_ */

include/sta/rtos/thread.hpp

@@ -107,6 +107,12 @@ namespace sta
 		 */
 		void sleep(uint32_t ticks);
 
+		/**
+		 * @brief Makes the currently running thread pass control to the next thread.
+		 * 
+		 */
+		void yield();
+
 		/**
 		 * @brief Send user notification flags to thread.
 		 *