Advertise globals using a new display event.

wayland-client.c

@@ -41,6 +41,7 @@ static const char socket_name[] = "\0wayland";
 struct wl_global {
 	uint32_t id;
 	char *interface;
+	uint32_t version;
 	struct wl_list link;
 };
 
@@ -133,11 +134,8 @@ WL_EXPORT struct wl_display *
 wl_display_create(const char *name, size_t name_size)
 {
 	struct wl_display *display;
-	struct wl_global *global;
 	struct sockaddr_un addr;
 	socklen_t size;
-	char buffer[256];
-	uint32_t id, length, count, i;
 
 	display = malloc(sizeof *display);
 	if (display == NULL)
@@ -165,29 +163,8 @@ wl_display_create(const char *name, size_t name_size)
 	 * guess... */
 	read(display->fd, &display->id, sizeof display->id);
 
-	read(display->fd, &count, sizeof count);
-
 	wl_list_init(&display->global_list);
 	wl_list_init(&display->visual_list);
-	for (i = 0; i < count; i++) {
-		/* FIXME: actually discover advertised objects here. */
-		read(display->fd, &id, sizeof id);
-		read(display->fd, &length, sizeof length);
-		read(display->fd, buffer, (length + 3) & ~3);
-
-		global = malloc(sizeof *global);
-		if (global == NULL)
-			return NULL;
-
-		global->id = id;
-		global->interface = malloc(length + 1);
-		memcpy(global->interface, buffer, length);
-		global->interface[length] = '\0';
-		wl_list_insert(display->global_list.prev, &global->link);
-
-		if (strcmp(global->interface, "visual") == 0)
-			add_visual(display, global);
-	}
 
 	display->proxy.display = display;
 	display->proxy.id = wl_display_get_object_id(display, "display");
@@ -196,6 +173,9 @@ wl_display_create(const char *name, size_t name_size)
 						   connection_update,
 						   display);
 
+	/* Process connection events. */
+	wl_display_iterate(display, WL_CONNECTION_READABLE);
+
 	return display;
 }
 
@@ -237,14 +217,47 @@ wl_display_get_fd(struct wl_display *display,
 	return display->fd;
 }
 
+#define WL_DISPLAY_INVALID_OBJECT 0
+#define WL_DISPLAY_INVALID_METHOD 1
+#define WL_DISPLAY_NO_MEMORY 2
+#define WL_DISPLAY_GLOBAL 3
+
+static void
+handle_global(struct wl_display *display, uint32_t *p, uint32_t size)
+{
+	struct wl_global *global;
+	uint32_t length;
+
+	global = malloc(sizeof *global);
+	if (global == NULL)
+		return;
+
+	global->id = p[0];
+	length = p[1];
+	global->interface = malloc(length + 1);
+	if (global->interface == NULL) {
+		free(global);
+		return;
+	}
+	memcpy(global->interface, &p[2], length);
+	global->interface[length] = '\0';
+	global->version = p[2 + DIV_ROUNDUP(length, sizeof *p)];
+	wl_list_insert(display->global_list.prev, &global->link);
+
+	if (strcmp(global->interface, "visual") == 0)
+		add_visual(display, global);
+}
+
 static void
 handle_event(struct wl_display *display,
 	     uint32_t object, uint32_t opcode, uint32_t size)
 {
-	uint32_t p[10];
+	uint32_t p[32];
 
 	wl_connection_copy(display->connection, p, size);
-	if (display->event_handler != NULL)
+	if (object == 1 && opcode == WL_DISPLAY_GLOBAL) {
+		handle_global(display, p + 2, size);
+	} else if (display->event_handler != NULL)
 		display->event_handler(display, object, opcode, size, p + 2,
 				       display->event_handler_data);
 	wl_connection_consume(display->connection, size);

wayland-util.h

@@ -31,6 +31,8 @@
 #endif
 
 #define ARRAY_LENGTH(a) (sizeof (a) / sizeof (a)[0])
+#define ALIGN(n, a) ( ((n) + ((a) - 1)) & ~((a) - 1) )
+#define DIV_ROUNDUP(n, a) ( ((n) + ((a) - 1)) / (a) )
 
 #define container_of(ptr, type, member) ({			\
 	const typeof( ((type *)0)->member ) *__mptr = (ptr);	\

wayland.c

@@ -71,30 +71,31 @@ wl_client_vmarshal(struct wl_client *client, struct wl_object *sender,
 {
 	const struct wl_event *event;
 	struct wl_object *object;
-	uint32_t args[10], size;
+	uint32_t args[32], length, *p, size;
+	const char *s;
 	int i, count;
 
 	event = &sender->interface->events[opcode];
-	count = strlen(event->signature) + 2;
+	count = strlen(event->signature);
 	assert(count <= ARRAY_LENGTH(args));
 
-	size = 0;
-	for (i = 2; i < count; i++) {
-		switch (event->signature[i - 2]) {
+	p = &args[2];
+	for (i = 0; i < count; i++) {
+		switch (event->signature[i]) {
 		case 'u':
 		case 'i':
-			args[i] = va_arg(ap, uint32_t);
-			size += sizeof args[i];
+			*p++ = va_arg(ap, uint32_t);
 			break;
 		case 's':
-			/* FIXME */
-			args[i] = 0;
-			size += sizeof args[i];
+			s = va_arg(ap, const char *);
+			length = strlen(s);
+			*p++ = length;
+			memcpy(p, s, length);
+			p += DIV_ROUNDUP(length, sizeof(*p));
 			break;
 		case 'o':
 			object = va_arg(ap, struct wl_object *);
-			args[i] = object->id;
-			size += sizeof args[i];
+			*p++ = object->id;
 			break;
 		default:
 			assert(0);
@@ -102,7 +103,7 @@ wl_client_vmarshal(struct wl_client *client, struct wl_object *sender,
 		}
 	}
 
-	size += 2 * sizeof args[0];
+	size = (p - args) * sizeof *p;
 	args[0] = sender->id;
 	args[1] = opcode | (size << 16);
 	wl_connection_write(client->connection, args, size);
@@ -205,6 +206,7 @@ wl_client_demarshal(struct wl_client *client, struct wl_object *target,
 #define WL_DISPLAY_INVALID_OBJECT 0
 #define WL_DISPLAY_INVALID_METHOD 1
 #define WL_DISPLAY_NO_MEMORY 2
+#define WL_DISPLAY_GLOBAL 3
 
 static void
 wl_client_connection_data(int fd, uint32_t mask, void *data)
@@ -272,28 +274,11 @@ wl_client_connection_update(struct wl_connection *connection,
 	return wl_event_source_fd_update(client->source, mask);
 }
 
-static void
-advertise_object(struct wl_client *client, struct wl_object *object)
-{
-	const struct wl_interface *interface;
-	static const char pad[4];
-	uint32_t length, p[2];
-
-	interface = object->interface;
-	length = strlen(interface->name);
-	p[0] = object->id;
-	p[1] = length;
-	wl_connection_write(client->connection, p, sizeof p);
-	wl_connection_write(client->connection, interface->name, length);
-	wl_connection_write(client->connection, pad, -length & 3);
-}
-
 static struct wl_client *
 wl_client_create(struct wl_display *display, int fd)
 {
 	struct wl_client *client;
 	struct wl_object_ref *ref;
-	uint32_t count;
 
 	client = malloc(sizeof *client);
 	if (client == NULL)
@@ -315,14 +300,14 @@ wl_client_create(struct wl_display *display, int fd)
 			    sizeof display->client_id_range);
 	display->client_id_range += 256;
 
-	/* Write list of global objects to client. */
-	count = wl_list_length(&display->global_list);
-	wl_connection_write(client->connection, &count, sizeof count);
-	
 	ref = container_of(display->global_list.next,
 			   struct wl_object_ref, link);
 	while (&ref->link != &display->global_list) {
-		advertise_object(client, ref->object);
+		wl_client_marshal(client, &client->display->base,
+				  WL_DISPLAY_GLOBAL,
+				  ref->object,
+				  ref->object->interface->name,
+				  ref->object->interface->version);
 
 		ref = container_of(ref->link.next,
 				   struct wl_object_ref, link);
@@ -455,6 +440,7 @@ static const struct wl_event display_events[] = {
 	{ "invalid_object", "u" },
 	{ "invalid_method", "uu" },
 	{ "no_memory", "" },
+	{ "global", "osu" },
 };
 
 static const struct wl_interface display_interface = {