perf rblist: Create rblist__exit() function

Currently we have a rblist__delete() which is used to delete a rblist.
While rblist__delete() will free the pointer of rblist at the end.

It's an inconvenience for the user to delete a rblist which is not
allocated by something like malloc(). For example, the rblist is
embedded in a larger data structure.

This patch creates a new function rblist__exit() which is similar to
rblist__delete() but it will not free the pointer of rblist.

Signed-off-by: Jin Yao <yao.jin@linux.intel.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1512125856-22056-2-git-send-email-yao.jin@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/util/rblist.c b/tools/perf/util/rblist.c
index 0dfe27d..0efc325 100644 (file)
--- a/tools/perf/util/rblist.c
+++ b/tools/perf/util/rblist.c
@@ -101,16 +101,21 @@ void rblist__init(struct rblist *rblist)
        return;
 }
 
+void rblist__exit(struct rblist *rblist)
+{
+       struct rb_node *pos, *next = rb_first(&rblist->entries);
+
+       while (next) {
+               pos = next;
+               next = rb_next(pos);
+               rblist__remove_node(rblist, pos);
+       }
+}
+
 void rblist__delete(struct rblist *rblist)
 {
        if (rblist != NULL) {
-               struct rb_node *pos, *next = rb_first(&rblist->entries);
-
-               while (next) {
-                       pos = next;
-                       next = rb_next(pos);
-                       rblist__remove_node(rblist, pos);
-               }
+               rblist__exit(rblist);
                free(rblist);
        }
 }

diff --git a/tools/perf/util/rblist.h b/tools/perf/util/rblist.h
index 4c8638a..76df15c 100644 (file)
--- a/tools/perf/util/rblist.h
+++ b/tools/perf/util/rblist.h
@@ -29,6 +29,7 @@ struct rblist {
 };
 
 void rblist__init(struct rblist *rblist);
+void rblist__exit(struct rblist *rblist);
 void rblist__delete(struct rblist *rblist);
 int rblist__add_node(struct rblist *rblist, const void *new_entry);
 void rblist__remove_node(struct rblist *rblist, struct rb_node *rb_node);