[1/6] tools lib traceevent: Implement new API tep_get_ref()

Commit Message

Tzvetomir Stoyanov Dec. 5, 2018, 9:21 a.m. UTC

This patch implements a new API of the tracevent library:

  int tep_get_ref(struct tep_handle *tep);

The API returns the reference counter "ref_count" of the tep handler.
As "struct tep_handle" is internal only, its members cannot be accessed
by the library users, the API is used to get the reference counter.

Signed-off-by: Tzvetomir Stoyanov <[e-mail]>
Cc: Andrew Morton <[e-mail]>
Cc: Jiri Olsa <[e-mail]>
Cc: Namhyung Kim <[e-mail]>
Link: http://lkml.kernel.org/r/[e-mail]
Signed-off-by: Steven Rostedt (VMware) <[e-mail]>
Signed-off-by: Arnaldo Carvalho de Melo <[e-mail]>
---
 include/traceevent/event-parse.h | 1 +
 lib/traceevent/event-parse.c     | 7 +++++++
 2 files changed, 8 insertions(+)

Patch

diff --git a/include/traceevent/event-parse.h b/include/traceevent/event-parse.h
index af1f068..ea6d25d 100644
--- a/include/traceevent/event-parse.h
+++ b/include/traceevent/event-parse.h
@@ -577,6 +577,7 @@  struct tep_handle *tep_alloc(void);
 void tep_free(struct tep_handle *pevent);
 void tep_ref(struct tep_handle *pevent);
 void tep_unref(struct tep_handle *pevent);
+int tep_get_ref(struct tep_handle *tep);
 
 /* access to the internal parser */
 void tep_buffer_init(const char *buf, unsigned long long size);
diff --git a/lib/traceevent/event-parse.c b/lib/traceevent/event-parse.c
index 2e8031c..57e3615 100644
--- a/lib/traceevent/event-parse.c
+++ b/lib/traceevent/event-parse.c
@@ -6761,6 +6761,13 @@  void tep_ref(struct tep_handle *pevent)
 	pevent->ref_count++;
 }
 
+int tep_get_ref(struct tep_handle *tep)
+{
+	if (tep)
+		return tep->ref_count;
+	return 0;
+}
+
 void tep_free_format_field(struct tep_format_field *field)
 {
 	free(field->type);