curly wars / auto-indentation

[oweals/gnunet.git] / src / include / gnunet_plugin_lib.h

diff --git a/src/include/gnunet_plugin_lib.h b/src/include/gnunet_plugin_lib.h
index e4f603c4eb83b2b251dfbd18c28eef2eb2d8c7e0..387ca381c2dd34fd514f26c2d3bf12349e4a7639 100644 (file)
--- a/src/include/gnunet_plugin_lib.h
+++ b/src/include/gnunet_plugin_lib.h
@@ -41,10 +41,28 @@ extern "C"
 
 /**
  * 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.
@@ -55,9 +73,42 @@ typedef void *(*GNUNET_PLUGIN_Callback) (void *arg);
  *
  * @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);
 
 
 /**
@@ -66,9 +117,11 @@ void *GNUNET_PLUGIN_load (const char *library_name, void *arg);
  *
  * @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 */