1 files changed, 56 insertions, 0 deletions
diff --git a/database/storage_engine_types.h b/database/storage_engine_types.h
new file mode 100644
index 0000000000..c3bfc4a39b
--- /dev/null
+++ b/database/storage_engine_types.h
@@ -0,0 +1,56 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#ifndef NETDATA_STORAGE_ENGINE_TYPES_H
+#define NETDATA_STORAGE_ENGINE_TYPES_H
+
+#include "libnetdata/libnetdata.h"
+
+typedef struct rrddim RRDDIM;
+typedef struct storage_instance STORAGE_INSTANCE;
+typedef struct storage_metric_handle STORAGE_METRIC_HANDLE;
+typedef struct storage_alignment STORAGE_METRICS_GROUP;
+typedef struct storage_collect_handle STORAGE_COLLECT_HANDLE;
+typedef struct storage_query_handle STORAGE_QUERY_HANDLE;
+
+typedef enum __attribute__ ((__packed__)) {
+    STORAGE_ENGINE_NONE     = 0,
+    STORAGE_ENGINE_RAM      = 1,
+    STORAGE_ENGINE_MAP      = 2,
+    STORAGE_ENGINE_SAVE     = 3,
+    STORAGE_ENGINE_ALLOC    = 4,
+    STORAGE_ENGINE_DBENGINE = 5,
+} STORAGE_ENGINE_ID;
+
+#define STORAGE_ENGINE_NONE_NAME     "none"
+#define STORAGE_ENGINE_RAM_NAME      "ram"
+#define STORAGE_ENGINE_MAP_NAME      "map"
+#define STORAGE_ENGINE_SAVE_NAME     "save"
+#define STORAGE_ENGINE_ALLOC_NAME    "alloc"
+#define STORAGE_ENGINE_DBENGINE_NAME "dbengine"
+
+const char *storage_engine_name(STORAGE_ENGINE_ID id);
+bool storage_engine_id(const char *name, STORAGE_ENGINE_ID *id);
+
+typedef enum __attribute__ ((__packed__)) storage_priority {
+    STORAGE_PRIORITY_INTERNAL_DBENGINE = 0,
+    STORAGE_PRIORITY_INTERNAL_QUERY_PREP,
+
+    STORAGE_PRIORITY_HIGH,
+    STORAGE_PRIORITY_NORMAL,
+    STORAGE_PRIORITY_LOW,
+    STORAGE_PRIORITY_BEST_EFFORT,
+
+    STORAGE_PRIORITY_SYNCHRONOUS,
+
+    STORAGE_PRIORITY_INTERNAL_MAX_DONT_USE,
+} STORAGE_PRIORITY;
+
+struct storage_engine_query_handle {
+    time_t start_time_s;
+    time_t end_time_s;
+    STORAGE_PRIORITY priority;
+    STORAGE_ENGINE_ID id;
+    STORAGE_QUERY_HANDLE *handle;
+};
+
+#endif /* NETDATA_STORAGE_ENGINE_TYPES_H */
+\ No newline at end of file