1 files changed, 69 insertions, 0 deletions
diff --git a/database/rrdfamily.c b/database/rrdfamily.c
new file mode 100644
index 00000000..011cb28b
--- /dev/null
+++ b/database/rrdfamily.c
@@ -0,0 +1,69 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#define NETDATA_RRD_INTERNALS
+#include "rrd.h"
+
+typedef struct rrdfamily {
+    STRING *family;
+    DICTIONARY *rrdvars;
+} RRDFAMILY;
+
+// ----------------------------------------------------------------------------
+// RRDFAMILY index
+
+struct rrdfamily_constructor {
+    const char *family;
+};
+
+static void rrdfamily_insert_callback(const DICTIONARY_ITEM *item __maybe_unused, void *rrdfamily, void *constructor_data) {
+    RRDFAMILY *rf = rrdfamily;
+    struct rrdfamily_constructor *ctr = constructor_data;
+
+    rf->family = string_strdupz(ctr->family);
+    rf->rrdvars = rrdvariables_create();
+}
+
+static void rrdfamily_delete_callback(const DICTIONARY_ITEM *item __maybe_unused, void *rrdfamily, void *rrdhost __maybe_unused) {
+    RRDFAMILY *rf = rrdfamily;
+    string_freez(rf->family);
+    rrdvariables_destroy(rf->rrdvars);
+    rf->family = NULL;
+    rf->rrdvars = NULL;
+}
+
+void rrdfamily_index_init(RRDHOST *host) {
+    if(!host->rrdfamily_root_index) {
+        host->rrdfamily_root_index = dictionary_create_advanced(DICT_OPTION_DONT_OVERWRITE_VALUE | DICT_OPTION_FIXED_SIZE,
+                                                                &dictionary_stats_category_rrdhealth, sizeof(RRDFAMILY));
+
+        dictionary_register_insert_callback(host->rrdfamily_root_index, rrdfamily_insert_callback, NULL);
+        dictionary_register_delete_callback(host->rrdfamily_root_index, rrdfamily_delete_callback, host);
+    }
+}
+
+void rrdfamily_index_destroy(RRDHOST *host) {
+    dictionary_destroy(host->rrdfamily_root_index);
+    host->rrdfamily_root_index = NULL;
+}
+
+
+// ----------------------------------------------------------------------------
+// RRDFAMILY management
+
+const RRDFAMILY_ACQUIRED *rrdfamily_add_and_acquire(RRDHOST *host, const char *id) {
+    struct rrdfamily_constructor tmp = {
+        .family = id,
+    };
+    return (const RRDFAMILY_ACQUIRED *)dictionary_set_and_acquire_item_advanced(host->rrdfamily_root_index, id, -1, NULL, sizeof(RRDFAMILY), &tmp);
+}
+
+void rrdfamily_release(RRDHOST *host, const RRDFAMILY_ACQUIRED *rfa) {
+    if(unlikely(!rfa)) return;
+    dictionary_acquired_item_release(host->rrdfamily_root_index, (const DICTIONARY_ITEM *)rfa);
+}
+
+DICTIONARY *rrdfamily_rrdvars_dict(const RRDFAMILY_ACQUIRED *rfa) {
+    if(unlikely(!rfa)) return NULL;
+    RRDFAMILY *rf = dictionary_acquired_item_value((const DICTIONARY_ITEM *)rfa);
+    return(rf->rrdvars);
+}