1 files changed, 53 insertions, 0 deletions
diff --git a/src/knot/common/stats.h b/src/knot/common/stats.h
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+/*  Copyright (C) 2020 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
+
+    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, either version 3 of the License, or
+    (at your option) any later version.
+
+    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, see <https://www.gnu.org/licenses/>.
+ */
+
+/*!
+ * \brief Server statistics general API.
+ */
+
+#pragma once
+
+#include "knot/server/server.h"
+
+typedef uint64_t (*stats_val_f)(server_t *server);
+
+/*!
+ * \brief Statistics metrics item.
+ */
+typedef struct {
+	const char *name; /*!< Metrics name. */
+	stats_val_f val;  /*!< Metrics value getter. */
+} stats_item_t;
+
+/*!
+ * \brief Basic server metrics.
+ */
+extern const stats_item_t server_stats[];
+
+/*!
+ * \brief Read out value of single counter summed across threads.
+ */
+uint64_t stats_get_counter(uint64_t **stats_vals, uint32_t offset, unsigned threads);
+
+/*!
+ * \brief Reconfigures the statistics facility.
+ */
+void stats_reconfigure(conf_t *conf, server_t *server);
+
+/*!
+ * \brief Deinitializes the statistics facility.
+ */
+void stats_deinit(void);