Add mutex implementation

include/sta/os2/mutex.hpp

@@ -0,0 +1,31 @@
+#ifndef STA_OS2_MUTEX_HPP
+#define STA_OS2_MUTEX_HPP
+
+#include <sta/mutex.hpp>
+
+#include <cmsis_os2.h>
+
+
+namespace sta
+{
+	/**
+	 * @brief Implementation of Mutex for CMSIS V2.
+	 */
+	class Os2Mutex : public Mutex
+	{
+	public:
+		/**
+		 * @param handle    CMSIS V2 mutex
+		 */
+		Os2Mutex(osMutexId_t * handle);
+
+		void acquire() override;
+		void release() override;
+
+	private:
+		osMutexId_t * handle_;    /**< CMSIS V2 mutex */
+	};
+} // namespace sta
+
+
+#endif // STA_OS2_MUTEX_HPP

src/os2/mutex.cpp

@@ -0,0 +1,19 @@
+#include <sta/os2/mutex.hpp>
+
+
+namespace sta
+{
+	Os2Mutex::Os2Mutex(osMutexId_t * handle)
+		: handle_{handle}
+	{}
+
+	void Os2Mutex::acquire()
+	{
+		osMutexAcquire(*handle_, osWaitForever);
+	}
+
+	void Os2Mutex::release()
+	{
+		osMutexRelease(*handle_);
+	}
+}