/**
* Signature of any function exported by a plugin.
+ *
+ * @param arg argument to the function (context)
+ * @return some pointer, NULL if the plugin was
+ * shutdown or if there was an error, otherwise
+ * the plugin's API on success
*/
typedef void *(*GNUNET_PLUGIN_Callback) (void *arg);
+/**
+ * Test if a plugin exists.
+ *
+ * Note that the library must export a symbol called
+ * "library_name_init" for the test to succeed.
+ *
+ * @param library_name name of the plugin to test if it is installed
+ * @return GNUNET_YES if the plugin exists, GNUNET_NO if not
+ */
+int
+GNUNET_PLUGIN_test (const char *library_name);
+
+
/**
* Setup plugin (runs the "init" callback and returns whatever "init"
* returned). If "init" returns NULL, the plugin is unloaded.
*
* @param library_name name of the plugin to load
* @param arg argument to the plugin initialization function
- * @return whatever the initialization function returned
+ * @return whatever the initialization function returned, NULL on error
+ */
+void *
+GNUNET_PLUGIN_load (const char *library_name, void *arg);
+
+
+/**
+ * Signature of a function called by 'GNUNET_PLUGIN_load_all'.
+ *
+ * @param cls closure
+ * @param library_name full name of the library (to be used with
+ * 'GNUNET_PLUGIN_unload')
+ * @param lib_ret return value from the initialization function
+ * of the library (same as what 'GNUNET_PLUGIN_load' would
+ * have returned for the given library name)
+ */
+typedef void (*GNUNET_PLUGIN_LoaderCallback) (void *cls,
+ const char *library_name,
+ void *lib_ret);
+
+
+/**
+ * Load all compatible plugins with the given base name.
+ *
+ * Note that the library must export symbols called
+ * "basename_ANYTHING_init" and "basename_ANYTHING__done". These will
+ * be called when the library is loaded and unloaded respectively.
+ *
+ * @param basename basename of the plugins to load
+ * @param arg argument to the plugin initialization function
+ * @param cb function to call for each plugin found
+ * @param cb_cls closure for 'cb'
*/
-void *GNUNET_PLUGIN_load (const char *library_name, void *arg);
+void
+GNUNET_PLUGIN_load_all (const char *basename, void *arg,
+ GNUNET_PLUGIN_LoaderCallback cb, void *cb_cls);
/**
*
* @param library_name name of the plugin to unload
* @param arg argument to the plugin shutdown function
- * @return whatever the shutdown function returned
+ * @return whatever the shutdown function returned, typically NULL
+ * or a "char *" representing the error message
*/
-void *GNUNET_PLUGIN_unload (const char *library_name, void *arg);
+void *
+GNUNET_PLUGIN_unload (const char *library_name, void *arg);
#if 0 /* keep Emacsens' auto-indent happy */