1 files changed, 59 insertions, 0 deletions
diff --git a/sql/ha_handler_stats.h b/sql/ha_handler_stats.h
new file mode 100644
index 00000000..726ba604
--- /dev/null
+++ b/sql/ha_handler_stats.h
@@ -0,0 +1,59 @@
+#ifndef HA_HANDLER_STATS_INCLUDED
+#define HA_HANDLER_STATS_INCLUDED
+/*
+   Copyright (c) 2023, MariaDB Foundation
+
+   This program is free software; you can redistribute it and/or
+   modify it under the terms of the GNU General Public License
+   as published by the Free Software Foundation; version 2 of
+   the License.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1335  USA
+*/
+
+/* Definitions for parameters to do with handler-routines */
+
+class ha_handler_stats
+{
+public:
+  ulonglong pages_accessed;              /* Pages accessed from page cache */
+  ulonglong pages_updated;               /* Pages changed in page cache */
+  ulonglong pages_read_count;            /* Pages read from disk */
+  ulonglong pages_read_time;             /* Time reading pages, in microsec. */
+  ulonglong undo_records_read;
+  ulonglong engine_time;                 /* Time spent in engine in microsec */
+  uint      active;                      /* <> 0 if status has to be updated */
+#define first_stat pages_accessed
+#define last_stat  engine_time
+  inline void reset()
+  {
+    bzero((void*) this, sizeof(*this));
+  }
+  inline void add(ha_handler_stats *stats)
+  {
+    ulonglong *to= &first_stat;
+    ulonglong *from= &stats->first_stat;
+    do
+    {
+      (*to)+= *from++;
+    } while (to++ != &last_stat);
+  }
+  inline bool has_stats()
+  {
+    ulonglong *to= &first_stat;
+    do
+    {
+      if (*to)
+        return 1;
+    } while (to++ != &last_stat);
+    return 0;
+  }
+};
+#endif /* HA_HANDLER_STATS_INCLUDED */