core: add pointer in some callbacks (closes #406)

This pointer is the first argument received by callbacks, and the
existing argument "data" is now automatically freed by WeeChat when the
object containing the callback is removed.

With this new pointer, the linked list of callbacks in scripts has been
removed. This will improve speed of scripts (using a lot of hooks),
reduce memory used by scripts and reduce time to unload scripts.

Following functions are affected in the C API:

* exec_on_files
* config_new
* config_new_section
* config_new_option
* hook_command
* hook_command_run
* hook_timer
* hook_fd
* hook_process
* hook_process_hashtable
* hook_connect
* hook_print
* hook_signal
* hook_hsignal
* hook_config
* hook_completion
* hook_modifier
* hook_info
* hook_info_hashtable
* hook_infolist
* hook_hdata
* hook_focus
* unhook_all_plugin
* buffer_new
* bar_item_new
* upgrade_new
* upgrade_read

1 files changed, 8 insertions, 6 deletions

diff --git a/src/plugins/alias/alias-info.c b/src/plugins/alias/alias-info.c
index 600f0c8c2..484c6082b 100644
--- a/src/plugins/alias/alias-info.c
+++ b/src/plugins/alias/alias-info.c
@@ -30,28 +30,30 @@
  */
 
 struct t_infolist *
-alias_info_infolist_alias_cb (void *data, const char *infolist_name,
-                              void *pointer, const char *arguments)
+alias_info_infolist_alias_cb (const void *pointer, void *data,
+                              const char *infolist_name,
+                              void *obj_pointer, const char *arguments)
 {
     struct t_infolist *ptr_infolist;
     struct t_alias *ptr_alias;
 
     /* make C compiler happy */
+    (void) pointer;
     (void) data;
     (void) infolist_name;
     (void) arguments;
 
-    if (pointer && !alias_valid (pointer))
+    if (obj_pointer && !alias_valid (obj_pointer))
         return NULL;
 
     ptr_infolist = weechat_infolist_new ();
     if (!ptr_infolist)
         return NULL;
 
-    if (pointer)
+    if (obj_pointer)
     {
         /* build list with only one alias */
-        if (!alias_add_to_infolist (ptr_infolist, pointer))
+        if (!alias_add_to_infolist (ptr_infolist, obj_pointer))
         {
             weechat_infolist_free (ptr_infolist);
             return NULL;
@@ -90,5 +92,5 @@ alias_info_init ()
         "alias", N_("list of aliases"),
         N_("alias pointer (optional)"),
         N_("alias name (wildcard \"*\" is allowed) (optional)"),
-        &alias_info_infolist_alias_cb, NULL);
+        &alias_info_infolist_alias_cb, NULL, NULL);
 }