Added barrier pattern, thread yield and updated event API

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_ */