src/plugin.[ch]: Add meta data to value_list_t.

diff --git a/src/plugin.c b/src/plugin.c
index 6139baf..a5ae97b 100644 (file)
--- a/src/plugin.c
+++ b/src/plugin.c
@@ -1136,6 +1136,8 @@ int plugin_dispatch_values (value_list_t *vl)
 
        data_set_t *ds;
 
+       int free_meta_data = 0;
+
        if ((vl == NULL) || (vl->type[0] == 0)
                        || (vl->values == NULL) || (vl->values_len < 1))
        {
@@ -1143,6 +1145,12 @@ int plugin_dispatch_values (value_list_t *vl)
                return (-1);
        }
 
+       /* Free meta data only if the calling function didn't specify any. In
+        * this case matches and targets may add some and the calling function
+        * may not expect (and therefore free) that data. */
+       if (vl->meta == NULL)
+               free_meta_data = 1;
+
        if (list_write == NULL)
                c_complain_once (LOG_WARNING, &no_write_complaint,
                                "plugin_dispatch_values: No write callback has been "
@@ -1283,6 +1291,12 @@ int plugin_dispatch_values (value_list_t *vl)
                vl->values_len = saved_values_len;
        }
 
+       if ((free_meta_data != 0) && (vl->meta != NULL))
+       {
+               meta_data_destroy (vl->meta);
+               vl->meta = NULL;
+       }
+
        return (0);
 } /* int plugin_dispatch_values */
 

diff --git a/src/plugin.h b/src/plugin.h
index e54b27d..e8e4956 100644 (file)
--- a/src/plugin.h
+++ b/src/plugin.h
@@ -24,6 +24,7 @@
 
 #include "collectd.h"
 #include "configfile.h"
+#include "meta_data.h"
 
 #define DATA_MAX_NAME_LEN 64
 
@@ -76,11 +77,12 @@ struct value_list_s
        char     plugin_instance[DATA_MAX_NAME_LEN];
        char     type[DATA_MAX_NAME_LEN];
        char     type_instance[DATA_MAX_NAME_LEN];
+       meta_data_t *meta;
 };
 typedef struct value_list_s value_list_t;
 
-#define VALUE_LIST_INIT { NULL, 0, 0, interval_g, "localhost", "", "", "", "" }
-#define VALUE_LIST_STATIC { NULL, 0, 0, 0, "localhost", "", "", "", "" }
+#define VALUE_LIST_INIT { NULL, 0, 0, interval_g, "localhost", "", "", "", "", NULL }
+#define VALUE_LIST_STATIC { NULL, 0, 0, 0, "localhost", "", "", "", "", NULL }
 
 struct data_source_s
 {