Simplify transactions

Commit 4b8e3a885be74c588291c51f798de80bd81a92db makes it so only one
transaction is committed (ie. configures sent) at a time. This commit
removes the now-unnecessary code which was used to support concurrent
committed transactions.

* Instead of containers storing a list of instructions which they've
been sent, it now stores a single instruction.
* Containers now have an ntxnrefs property. Previously we knew how many
references there were by the length of the instruction list.
* Instructions no longer need a ready property. It was used to avoid
marking an instruction ready twice when they were in a list, but this is
now avoided because there is only one instruction and we nullify the
container->instruction pointer when it's ready.
* When a transaction applies, we no longer need to consider releasing
and resaving the surface, as we know there are no other committed
transactions.
* transaction_notify_view_ready has been renamed to
view_notify_view_ready_by_serial to make it consistent with
transaction_notify_view_ready_by_size.
* Out-of-memory checks have been added when creating transactions and
instructions.

1 files changed, 1 insertions, 1 deletions

diff --git a/sway/desktop/xwayland.c b/sway/desktop/xwayland.c
index 5e8afa65..14f59b9c 100644
--- a/sway/desktop/xwayland.c
+++ b/sway/desktop/xwayland.c
@@ -284,7 +284,7 @@ static void handle_commit(struct wl_listener *listener, void *data) {
         struct wlr_xwayland_surface *xsurface = view->wlr_xwayland_surface;
         struct wlr_surface_state *surface_state = &xsurface->surface->current;
 
-        if (view->swayc->instructions->length) {
+        if (view->swayc->instruction) {
                 transaction_notify_view_ready_by_size(view,
                                 surface_state->width, surface_state->height);
         } else if (container_is_floating(view->swayc)) {