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, 11 insertions, 5 deletions

diff --git a/src/plugins/xfer/xfer-upgrade.c b/src/plugins/xfer/xfer-upgrade.c
index 65b3bbcab..8d0cb2809 100644
--- a/src/plugins/xfer/xfer-upgrade.c
+++ b/src/plugins/xfer/xfer-upgrade.c
@@ -58,7 +58,8 @@ xfer_upgrade_save ()
     int rc;
     struct t_upgrade_file *upgrade_file;
 
-    upgrade_file = weechat_upgrade_new (XFER_UPGRADE_FILENAME, 1);
+    upgrade_file = weechat_upgrade_new (XFER_UPGRADE_FILENAME,
+                                        NULL, NULL, NULL);
     if (!upgrade_file)
         return 0;
 
@@ -106,17 +107,19 @@ xfer_upgrade_set_buffer_callbacks ()
  */
 
 int
-xfer_upgrade_read_cb (void *data,
+xfer_upgrade_read_cb (const void *pointer, void *data,
                       struct t_upgrade_file *upgrade_file,
                       int object_id,
                       struct t_infolist *infolist)
 {
-    /* TODO: write xfer read cb */
+    /* make C compiler happy */
+    (void) pointer;
     (void) data;
     (void) upgrade_file;
     (void) object_id;
     (void) infolist;
 
+    /* TODO: write xfer read cb */
     return WEECHAT_RC_OK;
 }
 
@@ -136,10 +139,13 @@ xfer_upgrade_load ()
 
     xfer_upgrade_set_buffer_callbacks ();
 
-    upgrade_file = weechat_upgrade_new (XFER_UPGRADE_FILENAME, 0);
+    upgrade_file = weechat_upgrade_new (XFER_UPGRADE_FILENAME,
+                                        &xfer_upgrade_read_cb, NULL, NULL);
     if (!upgrade_file)
         return 0;
-    rc = weechat_upgrade_read (upgrade_file, &xfer_upgrade_read_cb, NULL);
+
+    rc = weechat_upgrade_read (upgrade_file);
+
     weechat_upgrade_close (upgrade_file);
 
     return rc;