src/daemon/plugin.[ch]: Make the user_data_t* const.

That is, user_data_t* passed to register_* functions. The actual callbacks
are still getting a user_data_t* since they, in theory, would be able to
modify the pointer stored in .data.

Issue: #1954

diff --git a/src/daemon/plugin.c b/src/daemon/plugin.c
index d6cf877..1fbd77d 100644 (file)
--- a/src/daemon/plugin.c
+++ b/src/daemon/plugin.c
@@ -365,7 +365,7 @@ static void log_list_callbacks (llist_t **list, /* {{{ */
 } /* }}} void log_list_callbacks */
 
 static int create_register_callback (llist_t **list, /* {{{ */
-               const char *name, void *callback, user_data_t *ud)
+               const char *name, void *callback, user_data_t const *ud)
 {
        callback_func_t *cf;
 
@@ -1266,7 +1266,7 @@ int plugin_register_read (const char *name,
 int plugin_register_complex_read (const char *group, const char *name,
                plugin_read_cb callback,
                cdtime_t interval,
-               user_data_t *user_data)
+               user_data_t const *user_data)
 {
        read_func_t *rf;
        int status;
@@ -1310,7 +1310,7 @@ int plugin_register_complex_read (const char *group, const char *name,
 } /* int plugin_register_complex_read */
 
 int plugin_register_write (const char *name,
-               plugin_write_cb callback, user_data_t *ud)
+               plugin_write_cb callback, user_data_t const *ud)
 {
        return (create_register_callback (&list_write, name,
                                (void *) callback, ud));
@@ -1357,7 +1357,7 @@ static char *plugin_flush_callback_name (const char *name)
 } /* static char *plugin_flush_callback_name */
 
 int plugin_register_flush (const char *name,
-               plugin_flush_cb callback, user_data_t *ud)
+               plugin_flush_cb callback, user_data_t const *ud)
 {
        int status;
        plugin_ctx_t ctx = plugin_get_ctx ();
@@ -1417,7 +1417,7 @@ int plugin_register_flush (const char *name,
 } /* int plugin_register_flush */
 
 int plugin_register_missing (const char *name,
-               plugin_missing_cb callback, user_data_t *ud)
+               plugin_missing_cb callback, user_data_t const *ud)
 {
        return (create_register_callback (&list_missing, name,
                                (void *) callback, ud));
@@ -1488,14 +1488,14 @@ int plugin_register_data_set (const data_set_t *ds)
 } /* int plugin_register_data_set */
 
 int plugin_register_log (const char *name,
-               plugin_log_cb callback, user_data_t *ud)
+               plugin_log_cb callback, user_data_t const *ud)
 {
        return (create_register_callback (&list_log, name,
                                (void *) callback, ud));
 } /* int plugin_register_log */
 
 int plugin_register_notification (const char *name,
-               plugin_notification_cb callback, user_data_t *ud)
+               plugin_notification_cb callback, user_data_t const *ud)
 {
        return (create_register_callback (&list_notification, name,
                                (void *) callback, ud));

diff --git a/src/daemon/plugin.h b/src/daemon/plugin.h
index de42c06..d3038a3 100644 (file)
--- a/src/daemon/plugin.h
+++ b/src/daemon/plugin.h
@@ -296,20 +296,20 @@ int plugin_register_read (const char *name,
 int plugin_register_complex_read (const char *group, const char *name,
                plugin_read_cb callback,
                cdtime_t interval,
-               user_data_t *user_data);
+               user_data_t const *user_data);
 int plugin_register_write (const char *name,
-               plugin_write_cb callback, user_data_t *user_data);
+               plugin_write_cb callback, user_data_t const *user_data);
 int plugin_register_flush (const char *name,
-               plugin_flush_cb callback, user_data_t *user_data);
+               plugin_flush_cb callback, user_data_t const *user_data);
 int plugin_register_missing (const char *name,
-               plugin_missing_cb callback, user_data_t *user_data);
+               plugin_missing_cb callback, user_data_t const *user_data);
 int plugin_register_shutdown (const char *name,
                plugin_shutdown_cb callback);
 int plugin_register_data_set (const data_set_t *ds);
 int plugin_register_log (const char *name,
-               plugin_log_cb callback, user_data_t *user_data);
+               plugin_log_cb callback, user_data_t const *user_data);
 int plugin_register_notification (const char *name,
-               plugin_notification_cb callback, user_data_t *user_data);
+               plugin_notification_cb callback, user_data_t const *user_data);
 
 int plugin_unregister_config (const char *name);
 int plugin_unregister_complex_config (const char *name);