Merge branch 'collectd-4.5'

[collectd.git] / src / plugin.h

diff --git a/src/plugin.h b/src/plugin.h
index dc3bbb0..a6f89a0 100644 (file)
--- a/src/plugin.h
+++ b/src/plugin.h
@@ -52,6 +52,11 @@
 #define NOTIF_WARNING 2
 #define NOTIF_OKAY    4
 
+#define FILTER_NOWRITE 1
+#define FILTER_NOTHRESHOLD_CHECK 2
+/* FILTER_IGNORE has to equal the bitwise or of all other filter flags */
+#define FILTER_IGNORE (FILTER_NOWRITE | FILTER_NOTHRESHOLD_CHECK)
+
 /*
  * Public data types
  */
@@ -178,6 +183,36 @@ void plugin_init_all (void);
 void plugin_read_all (void);
 void plugin_shutdown_all (void);
 
+/*
+ * NAME
+ *  plugin_write
+ *
+ * DESCRIPTION
+ *  Calls the write function of the given plugin with the provided data set and
+ *  value list. It differs from `plugin_dispatch_value' in that it does not
+ *  update the cache, does no do threshold checking, call the chain subsystem
+ *  and so on. It looks up the requested plugin and invokes the function, end
+ *  of story.
+ *
+ * ARGUMENTS
+ *  plugin     Name of the plugin. If NULL, the value is sent to all registered
+ *             write functions.
+ *  ds         Pointer to the data_set_t structure. If NULL, the data set is
+ *             looked up according to the `type' member in the `vl' argument.
+ *  vl         The actual value to be processes. Must not be NULL.
+ *
+ * RETURN VALUE
+ *  Returns zero upon success or non-zero if an error occurred. If `plugin' is
+ *  NULL and more than one plugin is called, an error is only returned if *all*
+ *  plugins fail.
+ *
+ * NOTES
+ *  This is the function used by the `write' built-in target. May be used by
+ *  other target plugins.
+ */
+int plugin_write (const char *plugin,
+    const data_set_t *ds, const value_list_t *vl);
+
 int plugin_flush (const char *plugin, int timeout, const char *identifier);
 
 /*
@@ -196,6 +231,8 @@ int plugin_register_read (const char *name,
                int (*callback) (void));
 int plugin_register_write (const char *name,
                int (*callback) (const data_set_t *ds, const value_list_t *vl));
+int plugin_register_filter (const char *name,
+               int (*callback) (const data_set_t *ds, value_list_t *vl));
 int plugin_register_flush (const char *name,
                int (*callback) (const int timeout, const char *identifier));
 int plugin_register_shutdown (char *name,
@@ -211,6 +248,7 @@ int plugin_unregister_complex_config (const char *name);
 int plugin_unregister_init (const char *name);
 int plugin_unregister_read (const char *name);
 int plugin_unregister_write (const char *name);
+int plugin_unregister_filter (const char *name);
 int plugin_unregister_flush (const char *name);
 int plugin_unregister_shutdown (const char *name);
 int plugin_unregister_data_set (const char *name);