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cleanup: Use g_clear_signal_handler() where possible

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This is inspired by 98892391d7 where the usage of
`g_signal_handler_disconnect()` without resetting the corresponding
handler id later resulted in a bug. Using `g_clear_signal_handler()`
makes sure we avoid similar bugs and is almost always the better
alternative. We use it for new code, let's clean up the old code to
also use it.

A further benefit is that it can get called even if the passed id is
0, allowing us to remove a lot of now unnessecary checks, and the fact
that `g_clear_signal_handler()` checks for the right type size, forcing us
to clean up all places where we used `guint` instead of `gulong`.

No functional changes intended here and all changes should be trivial,
thus bundled in one big commit.

https://gitlab.gnome.org/GNOME/mutter/merge_requests/940
This commit is contained in:
Robert Mader
2019-11-16 01:25:52 +01:00
committed by Florian Müllner
parent 22d1febf3c
commit 92375c75f8
45 changed files with 168 additions and 303 deletions
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19
src/wayland/meta-wayland-pointer.c
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@@ -535,10 +535,10 @@ meta_wayland_pointer_disable (MetaWaylandPointer *pointer)
meta_wayland_pointer_on_cursor_visibility_changed,
pointer);
if (pointer->cursor_surface && pointer->cursor_surface_destroy_id)
if (pointer->cursor_surface)
{
g_signal_handler_disconnect (pointer->cursor_surface,
pointer->cursor_surface_destroy_id);
g_clear_signal_handler (&pointer->cursor_surface_destroy_id,
pointer->cursor_surface);
}
meta_wayland_pointer_cancel_grab (pointer);
@@ -585,8 +585,8 @@ meta_wayland_pointer_set_current (MetaWaylandPointer *pointer,
{
if (pointer->current)
{
g_signal_handler_disconnect (pointer->current,
pointer->current_surface_destroyed_handler_id);
g_clear_signal_handler (&pointer->current_surface_destroyed_handler_id,
pointer->current);
pointer->current = NULL;
}
@@ -917,9 +917,8 @@ meta_wayland_pointer_set_focus (MetaWaylandPointer *pointer,
pointer->focus_client = NULL;
}
g_signal_handler_disconnect (pointer->focus_surface,
pointer->focus_surface_destroyed_handler_id);
pointer->focus_surface_destroyed_handler_id = 0;
g_clear_signal_handler (&pointer->focus_surface_destroyed_handler_id,
pointer->focus_surface);
pointer->focus_surface = NULL;
}
@@ -1101,8 +1100,8 @@ meta_wayland_pointer_set_cursor_surface (MetaWaylandPointer *pointer,
if (prev_cursor_surface)
{
meta_wayland_surface_update_outputs (prev_cursor_surface);
g_signal_handler_disconnect (prev_cursor_surface,
pointer->cursor_surface_destroy_id);
g_clear_signal_handler (&pointer->cursor_surface_destroy_id,
prev_cursor_surface);
}
if (cursor_surface)