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-rw-r--r--database/rrdsetvar.h44
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diff --git a/database/rrdsetvar.h b/database/rrdsetvar.h
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+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#ifndef NETDATA_RRDSETVAR_H
+#define NETDATA_RRDSETVAR_H 1
+
+#include "rrd.h"
+
+// variables linked to charts
+// We link variables to point to the values that are already
+// calculated / processed by the normal data collection process
+// This means, there will be no speed penalty for using
+// these variables
+
+struct rrdsetvar {
+ char *variable; // variable name
+ uint32_t hash; // variable name hash
+
+ char *key_fullid; // chart type.chart id.variable
+ char *key_fullname; // chart type.chart name.variable
+
+ RRDVAR_TYPE type;
+ void *value;
+
+ RRDVAR_OPTIONS options;
+
+ RRDVAR *var_local;
+ RRDVAR *var_family;
+ RRDVAR *var_host;
+ RRDVAR *var_family_name;
+ RRDVAR *var_host_name;
+
+ struct rrdset *rrdset;
+
+ struct rrdsetvar *next;
+};
+
+extern RRDSETVAR *rrdsetvar_custom_chart_variable_create(RRDSET *st, const char *name);
+extern void rrdsetvar_custom_chart_variable_set(RRDSETVAR *rv, calculated_number value);
+
+extern void rrdsetvar_rename_all(RRDSET *st);
+extern RRDSETVAR *rrdsetvar_create(RRDSET *st, const char *variable, RRDVAR_TYPE type, void *value, RRDVAR_OPTIONS options);
+extern void rrdsetvar_free(RRDSETVAR *rs);
+
+#endif //NETDATA_RRDSETVAR_H