Add task name recording for note RAM driver

include/nuttx/note/noteram_driver.h

@@ -27,6 +27,7 @@
 
 #include <nuttx/config.h>
 #include <nuttx/fs/ioctl.h>
+#include <sys/types.h>
 
 /****************************************************************************
  * Pre-processor Definitions
@@ -43,12 +44,21 @@
  * NOTERAM_SETMODE
  *              - Set overwrite mode
  *                Argument: A read-only pointer to unsigned int
+ * NOTERAM_GETTASKNAME
+ *              - Get task name string
+ *                Argument: A writable pointer to struct
+ *                          noteram_get_taskname_s
+ *                Result:   If -ESRCH, the corresponding task name doesn't
+ *                          exist.
  */
 
 #ifdef CONFIG_DRIVER_NOTERAM
 #define NOTERAM_CLEAR           _NOTERAMIOC(0x01)
 #define NOTERAM_GETMODE         _NOTERAMIOC(0x02)
 #define NOTERAM_SETMODE         _NOTERAMIOC(0x03)
+#if CONFIG_DRIVER_NOTERAM_TASKNAME_BUFSIZE > 0
+#define NOTERAM_GETTASKNAME     _NOTERAMIOC(0x04)
+#endif
 #endif
 
 /* Overwrite mode definitions */
@@ -59,6 +69,20 @@
 #define NOTERAM_MODE_OVERWRITE_OVERFLOW     2
 #endif
 
+/****************************************************************************
+ * Public Types
+ ****************************************************************************/
+
+/* This is the type of the argument passed to the NOTERAM_GETTASKNAME ioctl */
+
+#if CONFIG_DRIVER_NOTERAM_TASKNAME_BUFSIZE > 0
+struct noteram_get_taskname_s
+{
+  pid_t pid;
+  char taskname[CONFIG_TASK_NAME_SIZE + 1];
+};
+#endif
+
 /****************************************************************************
  * Public Function Prototypes
  ****************************************************************************/