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ivi-shell: remove redundant wl_list_empty/init calls

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Checking wl_list_empty() on a link offers no information: if it returns
true, wl_list_remove() is safe to do. If it returns false, you still do
not know if wl_list_remove() is safe; the link could be part of a list,
or the link could be "uninitialized" (e.g. just wl_list_remove()'d).
(From Pekka Paalanen's comment at
http://lists.freedesktop.org/archives/wayland-devel/2015-August/023987.html).

Calling wl_list_init just before wl_list_insert is redundant.  Because
the links of the list are not read before it is overwritten by
wl_list_insert.

Signed-off-by: Emre Ucan <eucan@de.adit-jv.com>
[Pekka: line-wrapped commit message]
Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
dev
Ucan, Emre (ADITG/SW1) 9 years ago committed by Pekka Paalanen
parent 174257bdf8
commit cf34dc2334
1 changed files with 18 additions and 62 deletions
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
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  1. 80
      ivi-shell/ivi-layout.c

80
ivi-shell/ivi-layout.c
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@ -154,12 +154,8 @@ remove_link_to_surface(struct ivi_layout_layer *ivilayer)
struct link_layer *next = NULL;
wl_list_for_each_safe(link, next, &ivilayer->link_to_surface, link_to_layer) {
if (!wl_list_empty(&link->link_to_layer)) {
wl_list_remove(&link->link_to_layer);
}
if (!wl_list_empty(&link->link)) {
wl_list_remove(&link->link);
}
wl_list_remove(&link->link_to_layer);
wl_list_remove(&link->link);
free(link);
}
@ -173,7 +169,6 @@ static void
add_link_to_layer(struct ivi_layout_screen *iviscrn,
struct link_screen *link_screen)
{
wl_list_init(&link_screen->link_to_screen);
wl_list_insert(&iviscrn->link_to_layer, &link_screen->link_to_screen);
}
@ -193,7 +188,6 @@ add_ordersurface_to_layer(struct ivi_layout_surface *ivisurf,
}
link_layer->ivilayer = ivilayer;
wl_list_init(&link_layer->link);
wl_list_insert(&ivisurf->layer_list, &link_layer->link);
add_link_to_surface(ivilayer, link_layer);
}
@ -205,12 +199,8 @@ remove_ordersurface_from_layer(struct ivi_layout_surface *ivisurf)
struct link_layer *next = NULL;
wl_list_for_each_safe(link_layer, next, &ivisurf->layer_list, link) {
if (!wl_list_empty(&link_layer->link)) {
wl_list_remove(&link_layer->link);
}
if (!wl_list_empty(&link_layer->link_to_layer)) {
wl_list_remove(&link_layer->link_to_layer);
}
wl_list_remove(&link_layer->link);
wl_list_remove(&link_layer->link_to_layer);
free(link_layer);
}
wl_list_init(&ivisurf->layer_list);
@ -232,7 +222,6 @@ add_orderlayer_to_screen(struct ivi_layout_layer *ivilayer,
}
link_scrn->iviscrn = iviscrn;
wl_list_init(&link_scrn->link);
wl_list_insert(&ivilayer->screen_list, &link_scrn->link);
add_link_to_layer(iviscrn, link_scrn);
}
@ -244,12 +233,8 @@ remove_orderlayer_from_screen(struct ivi_layout_layer *ivilayer)
struct link_screen *next = NULL;
wl_list_for_each_safe(link_scrn, next, &ivilayer->screen_list, link) {
if (!wl_list_empty(&link_scrn->link)) {
wl_list_remove(&link_scrn->link);
}
if (!wl_list_empty(&link_scrn->link_to_screen)) {
wl_list_remove(&link_scrn->link_to_screen);
}
wl_list_remove(&link_scrn->link);
wl_list_remove(&link_scrn->link_to_screen);
free(link_scrn);
}
wl_list_init(&ivilayer->screen_list);
@ -305,9 +290,7 @@ remove_all_notification(struct wl_list *listener_list)
wl_list_for_each_safe(listener, next, listener_list, link) {
struct listener_layout_notification *notification = NULL;
if (!wl_list_empty(&listener->link)) {
wl_list_remove(&listener->link);
}
wl_list_remove(&listener->link);
notification =
container_of(listener,
@ -424,7 +407,6 @@ create_screen(struct weston_compositor *ec)
continue;
}
wl_list_init(&iviscrn->link);
iviscrn->layout = layout;
iviscrn->id_screen = count;
@ -951,10 +933,7 @@ clear_surface_pending_list(struct ivi_layout_layer *ivilayer)
wl_list_for_each_safe(surface_link, surface_next,
&ivilayer->pending.surface_list, pending.link) {
if (!wl_list_empty(&surface_link->pending.link)) {
wl_list_remove(&surface_link->pending.link);
}
wl_list_remove(&surface_link->pending.link);
wl_list_init(&surface_link->pending.link);
}
}
@ -967,10 +946,7 @@ clear_surface_order_list(struct ivi_layout_layer *ivilayer)
wl_list_for_each_safe(surface_link, surface_next,
&ivilayer->order.surface_list, order.link) {
if (!wl_list_empty(&surface_link->order.link)) {
wl_list_remove(&surface_link->order.link);
}
wl_list_remove(&surface_link->order.link);
wl_list_init(&surface_link->order.link);
}
}
@ -1139,9 +1115,7 @@ remove_notification(struct wl_list *listener_list, void *callback, void *userdat
continue;
}
if (!wl_list_empty(&listener->link)) {
wl_list_remove(&listener->link);
}
wl_list_remove(&listener->link);
free(notification->userdata);
free(notification);
@ -1705,7 +1679,6 @@ ivi_layout_layer_create_with_dimension(uint32_t id_layer,
}
ivilayer->ref_count = 1;
wl_list_init(&ivilayer->link);
wl_signal_init(&ivilayer->property_changed);
wl_list_init(&ivilayer->screen_list);
wl_list_init(&ivilayer->link_to_surface);
@ -1771,15 +1744,10 @@ ivi_layout_layer_destroy(struct ivi_layout_layer *ivilayer)
clear_surface_pending_list(ivilayer);
clear_surface_order_list(ivilayer);
if (!wl_list_empty(&ivilayer->pending.link)) {
wl_list_remove(&ivilayer->pending.link);
}
if (!wl_list_empty(&ivilayer->order.link)) {
wl_list_remove(&ivilayer->order.link);
}
if (!wl_list_empty(&ivilayer->link)) {
wl_list_remove(&ivilayer->link);
}
wl_list_remove(&ivilayer->pending.link);
wl_list_remove(&ivilayer->order.link);
wl_list_remove(&ivilayer->link);
remove_orderlayer_from_screen(ivilayer);
remove_link_to_surface(ivilayer);
ivi_layout_layer_remove_notification(ivilayer);
@ -2048,10 +2016,7 @@ ivi_layout_layer_set_render_order(struct ivi_layout_layer *ivilayer,
continue;
}
if (!wl_list_empty(&ivisurf->pending.link)) {
wl_list_remove(&ivisurf->pending.link);
}
wl_list_init(&ivisurf->pending.link);
wl_list_remove(&ivisurf->pending.link);
wl_list_insert(&ivilayer->pending.surface_list,
&ivisurf->pending.link);
break;
@ -2295,10 +2260,7 @@ ivi_layout_screen_add_layer(struct ivi_layout_screen *iviscrn,
wl_list_for_each_safe(ivilayer, next, &layout->layer_list, link) {
if (ivilayer->id_layer == addlayer->id_layer) {
if (!wl_list_empty(&ivilayer->pending.link)) {
wl_list_remove(&ivilayer->pending.link);
}
wl_list_init(&ivilayer->pending.link);
wl_list_remove(&ivilayer->pending.link);
wl_list_insert(&iviscrn->pending.layer_list,
&ivilayer->pending.link);
break;
@ -2457,10 +2419,7 @@ ivi_layout_layer_add_surface(struct ivi_layout_layer *ivilayer,
wl_list_for_each_safe(ivisurf, next, &layout->surface_list, link) {
if (ivisurf->id_surface == addsurf->id_surface) {
if (!wl_list_empty(&ivisurf->pending.link)) {
wl_list_remove(&ivisurf->pending.link);
}
wl_list_init(&ivisurf->pending.link);
wl_list_remove(&ivisurf->pending.link);
wl_list_insert(&ivilayer->pending.surface_list,
&ivisurf->pending.link);
break;
@ -2487,9 +2446,7 @@ ivi_layout_layer_remove_surface(struct ivi_layout_layer *ivilayer,
wl_list_for_each_safe(ivisurf, next,
&ivilayer->pending.surface_list, pending.link) {
if (ivisurf->id_surface == remsurf->id_surface) {
if (!wl_list_empty(&ivisurf->pending.link)) {
wl_list_remove(&ivisurf->pending.link);
}
wl_list_remove(&ivisurf->pending.link);
wl_list_init(&ivisurf->pending.link);
break;
}
@ -2703,7 +2660,6 @@ ivi_layout_surface_create(struct weston_surface *wl_surface,
return NULL;
}
wl_list_init(&ivisurf->link);
wl_signal_init(&ivisurf->property_changed);
wl_signal_init(&ivisurf->configured);
wl_list_init(&ivisurf->layer_list);

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