backend/wayland: take wl_event_loop instead of wl_display

backend/backend.c

@@ -194,7 +194,8 @@ static struct wlr_auto_backend_monitor *auto_backend_monitor_create(
 }
 
 static struct wlr_backend *attempt_wl_backend(struct wl_display *display) {
-	struct wlr_backend *backend = wlr_wl_backend_create(display, NULL);
+	struct wl_event_loop *loop = wl_display_get_event_loop(display);
+	struct wlr_backend *backend = wlr_wl_backend_create(loop, NULL);
 	if (backend == NULL) {
 		return NULL;
 	}

backend/wayland/backend.c

@@ -480,7 +480,7 @@ static void backend_destroy(struct wlr_backend *backend) {
 
 	wlr_backend_finish(backend);
 
-	wl_list_remove(&wl->local_display_destroy.link);
+	wl_list_remove(&wl->event_loop_destroy.link);
 
 	wl_event_source_remove(wl->remote_display_src);
 
@@ -561,13 +561,12 @@ bool wlr_backend_is_wl(struct wlr_backend *b) {
 	return b->impl == &backend_impl;
 }
 
-static void handle_display_destroy(struct wl_listener *listener, void *data) {
-	struct wlr_wl_backend *wl =
-		wl_container_of(listener, wl, local_display_destroy);
+static void handle_event_loop_destroy(struct wl_listener *listener, void *data) {
+	struct wlr_wl_backend *wl = wl_container_of(listener, wl, event_loop_destroy);
 	backend_destroy(&wl->backend);
 }
 
-struct wlr_backend *wlr_wl_backend_create(struct wl_display *display,
+struct wlr_backend *wlr_wl_backend_create(struct wl_event_loop *loop,
 		struct wl_display *remote_display) {
 	wlr_log(WLR_INFO, "Creating wayland backend");
 
@@ -579,7 +578,7 @@ struct wlr_backend *wlr_wl_backend_create(struct wl_display *display,
 
 	wlr_backend_init(&wl->backend, &backend_impl);
 
-	wl->local_display = display;
+	wl->event_loop = loop;
 	wl_list_init(&wl->outputs);
 	wl_list_init(&wl->seats);
 	wl_list_init(&wl->buffers);
@@ -644,7 +643,6 @@ struct wlr_backend *wlr_wl_backend_create(struct wl_display *display,
 		zwp_linux_dmabuf_feedback_v1_destroy(linux_dmabuf_feedback_v1);
 	}
 
-	struct wl_event_loop *loop = wl_display_get_event_loop(wl->local_display);
 	int fd = wl_display_get_fd(wl->remote_display);
 	wl->remote_display_src = wl_event_loop_add_fd(loop, fd, WL_EVENT_READABLE,
 		dispatch_events, wl);
@@ -666,8 +664,8 @@ struct wlr_backend *wlr_wl_backend_create(struct wl_display *display,
 		wl->drm_fd = -1;
 	}
 
-	wl->local_display_destroy.notify = handle_display_destroy;
-	wl_display_add_destroy_listener(display, &wl->local_display_destroy);
+	wl->event_loop_destroy.notify = handle_event_loop_destroy;
+	wl_event_loop_add_destroy_listener(loop, &wl->event_loop_destroy);
 
 	const char *token = getenv("XDG_ACTIVATION_TOKEN");
 	if (token != NULL) {

backend/wayland/output.c

@@ -774,7 +774,7 @@ static struct wlr_wl_output *output_create(struct wlr_wl_backend *backend,
 	wlr_output_state_set_custom_mode(&state, 1280, 720, 0);
 
 	wlr_output_init(wlr_output, &backend->backend, &output_impl,
-		wl_display_get_event_loop(backend->local_display), &state);
+		backend->event_loop, &state);
 	wlr_output_state_finish(&state);
 
 	wlr_output->adaptive_sync_status = WLR_OUTPUT_ADAPTIVE_SYNC_ENABLED;
@@ -871,9 +871,8 @@ struct wlr_output *wlr_wl_output_create(struct wlr_backend *wlr_backend) {
 			&xdg_toplevel_listener, output);
 	wl_surface_commit(output->surface);
 
-	struct wl_event_loop *event_loop = wl_display_get_event_loop(backend->local_display);
 	while (!output->configured) {
-		int ret = wl_event_loop_dispatch(event_loop, -1);
+		int ret = wl_event_loop_dispatch(backend->event_loop, -1);
 		if (ret < 0) {
 			wlr_log(WLR_ERROR, "wl_event_loop_dispatch() failed");
 			goto error;

examples/embedded.c

@@ -159,7 +159,8 @@ int main(int argc, char *argv[]) {
 	init_egl(remote_display);
 
 	struct wl_display *local_display = wl_display_create();
-	struct wlr_backend *backend = wlr_wl_backend_create(local_display, remote_display);
+	struct wl_event_loop *event_loop = wl_display_get_event_loop(local_display);
+	struct wlr_backend *backend = wlr_wl_backend_create(event_loop, remote_display);
 	struct wlr_renderer *renderer = wlr_renderer_autocreate(backend);
 	wlr_renderer_init_wl_display(renderer, local_display);
 	struct wlr_allocator *allocator = wlr_allocator_autocreate(backend, renderer);

include/backend/wayland.h

@@ -20,12 +20,12 @@ struct wlr_wl_backend {
 
 	/* local state */
 	bool started;
-	struct wl_display *local_display;
+	struct wl_event_loop *event_loop;
 	struct wl_list outputs;
 	int drm_fd;
 	struct wl_list buffers; // wlr_wl_buffer.link
 	size_t requested_outputs;
-	struct wl_listener local_display_destroy;
+	struct wl_listener event_loop_destroy;
 	char *activation_token;
 
 	/* remote state */

include/wlr/backend/wayland.h

@@ -15,7 +15,7 @@ struct wlr_input_device;
  * The remote_display argument is an existing libwayland-client struct wl_display
  * to use. Leave it NULL to create a new connection to the compositor.
  */
-struct wlr_backend *wlr_wl_backend_create(struct wl_display *display,
+struct wlr_backend *wlr_wl_backend_create(struct wl_event_loop *loop,
 		struct wl_display *remote_display);
 
 /**