tools lib traceevent: Add retrieval of preempt count and latency flags

Add a way to retrieve the preempt count as well as the latency flags from a
pevent_record.

int pevent_data_preempt_count(pevent, record);

returns the preempt count of a record.

int pevent_data_flags(pevent, record);

returns the latency flags for a record.

Signed-off-by: Steven Rostedt <[e-mail]>
Acked-by: Namhyung Kim <[e-mail]>
Cc: Andrew Morton <[e-mail]>
Cc: Jiri Olsa <[e-mail]>
Link: http://lkml.kernel.org/r/[e-mail]
Signed-off-by: Arnaldo Carvalho de Melo <[e-mail]>

tools/lib/traceevent/event-parse.c

···
 }
 
 /**
- * pevent_data_pid - parse the PID from raw data
+ * pevent_data_pid - parse the PID from record
  * @pevent: a handle to the pevent
  * @rec: the record to parse
  *
- * This returns the PID from a raw data.
+ * This returns the PID from a record.
  */
 int pevent_data_pid(struct pevent *pevent, struct pevent_record *rec)
 {
 	return parse_common_pid(pevent, rec->data);
+}
+
+/**
+ * pevent_data_prempt_count - parse the preempt count from the record
+ * @pevent: a handle to the pevent
+ * @rec: the record to parse
+ *
+ * This returns the preempt count from a record.
+ */
+int pevent_data_prempt_count(struct pevent *pevent, struct pevent_record *rec)
+{
+	return parse_common_pc(pevent, rec->data);
+}
+
+/**
+ * pevent_data_flags - parse the latency flags from the record
+ * @pevent: a handle to the pevent
+ * @rec: the record to parse
+ *
+ * This returns the latency flags from a record.
+ *
+ *  Use trace_flag_type enum for the flags (see event-parse.h).
+ */
+int pevent_data_flags(struct pevent *pevent, struct pevent_record *rec)
+{
+	return parse_common_flags(pevent, rec->data);
 }
 
 /**

tools/lib/traceevent/event-parse.h

···
 int pevent_data_type(struct pevent *pevent, struct pevent_record *rec);
 struct event_format *pevent_data_event_from_type(struct pevent *pevent, int type);
 int pevent_data_pid(struct pevent *pevent, struct pevent_record *rec);
+int pevent_data_prempt_count(struct pevent *pevent, struct pevent_record *rec);
+int pevent_data_flags(struct pevent *pevent, struct pevent_record *rec);
 const char *pevent_data_comm_from_pid(struct pevent *pevent, int pid);
 struct cmdline;
 struct cmdline *pevent_data_pid_from_comm(struct pevent *pevent, const char *comm,