From: "Steven Rostedt (VMware)" <rostedt@xxxxxxxxxxx>
Add tracefs_list_size() that returns a the size of a list created by
tracefs_list_add().
Signed-off-by: Steven Rostedt (VMware) <rostedt@xxxxxxxxxxx>
---
include/tracefs.h | 1 +
src/tracefs-utils.c | 16 ++++++++++++++++
2 files changed, 17 insertions(+)
diff --git a/include/tracefs.h b/include/tracefs.h
index 266c513e4116..6b9a76c4c40a 100644
--- a/include/tracefs.h
+++ b/include/tracefs.h
@@ -65,6 +65,7 @@ int tracefs_error_clear(struct tracefs_instance *instance);
void tracefs_list_free(char **list);
char **tracefs_list_add(char **list, const char *string);
+int tracefs_list_size(char **list);
/**
* tracefs_trace_on_get_fd - Get a file descriptor of "tracing_on" in given instance
diff --git a/src/tracefs-utils.c b/src/tracefs-utils.c
index ec5ecb08ed2e..6750336c9ef6 100644
--- a/src/tracefs-utils.c
+++ b/src/tracefs-utils.c
@@ -447,3 +447,19 @@ char **tracefs_list_add(char **list, const char *string)
return list;
}
+
+/**
+ * tracefs_list_size - Return the number of strings in the list
+ * @list: The list to determine the size.
+ *
+ * Returns the number of elements in the list.
+ * If @list is NULL, then zero is returned.
+ */
+int tracefs_list_size(char **list)
+{
+ if (!list)
+ return 0;
+
+ list--;
+ return (int)*(unsigned long *)list;
+}
--
2.30.2
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