udev-seat: Make the udev_input structure an embedded structure

And as a result of this stop iterating through the compositor seat list
(of one item) and instead access the udev_input structure directly.

This enables a refactoring to pull out the weston_seat into a separate
structure permitting multiple seats.

src/compositor-drm.c

@@ -107,6 +107,7 @@ struct drm_compositor {
 	uint32_t prev_state;
 
 	clockid_t clock;
+	struct udev_input input;
 };
 
 struct drm_mode {
@@ -2222,10 +2223,8 @@ static void
 drm_destroy(struct weston_compositor *ec)
 {
 	struct drm_compositor *d = (struct drm_compositor *) ec;
-	struct udev_input *input, *next;
 
-	wl_list_for_each_safe(input, next, &ec->seat_list, base.link)
-		udev_input_destroy(input);
+	udev_input_destroy(&d->input);
 
 	wl_event_source_remove(d->udev_drm_source);
 	wl_event_source_remove(d->drm_source);
@@ -2282,7 +2281,6 @@ static void
 vt_func(struct weston_compositor *compositor, int event)
 {
 	struct drm_compositor *ec = (struct drm_compositor *) compositor;
-	struct udev_input *input;
 	struct drm_sprite *sprite;
 	struct drm_output *output;
 
@@ -2297,13 +2295,11 @@ vt_func(struct weston_compositor *compositor, int event)
 		compositor->state = ec->prev_state;
 		drm_compositor_set_modes(ec);
 		weston_compositor_damage_all(compositor);
-		wl_list_for_each(input, &compositor->seat_list, base.link)
-			udev_input_enable(input, ec->udev);
+		udev_input_enable(&ec->input, ec->udev);
 		break;
 	case TTY_LEAVE_VT:
 		weston_log("leaving VT\n");
-		wl_list_for_each(input, &compositor->seat_list, base.link)
-			udev_input_disable(input);
+		udev_input_disable(&ec->input);
 
 		compositor->focus = 0;
 		ec->prev_state = compositor->state;
@@ -2431,7 +2427,6 @@ drm_compositor_create(struct wl_display *display,
 	struct drm_compositor *ec;
 	struct udev_device *drm_device;
 	struct wl_event_loop *loop;
-	struct udev_input *udev_input, *next;
 	const char *path;
 	uint32_t key;
 
@@ -2520,7 +2515,7 @@ drm_compositor_create(struct wl_display *display,
 
 	path = NULL;
 
-	if (udev_input_create(&ec->base, ec->udev, seat_id) == NULL) {
+	if (udev_input_init(&ec->input, &ec->base, ec->udev, seat_id) < 0) {
 		weston_log("failed to create input devices\n");
 		goto err_sprite;
 	}
@@ -2563,8 +2558,7 @@ err_udev_monitor:
 	udev_monitor_unref(ec->udev_monitor);
 err_drm_source:
 	wl_event_source_remove(ec->drm_source);
-	wl_list_for_each_safe(udev_input, next, &ec->base.seat_list, base.link)
-		udev_input_destroy(udev_input);
+	udev_input_destroy(&ec->input);
 err_sprite:
 	ec->base.renderer->destroy(&ec->base);
 	gbm_device_destroy(ec->gbm);

src/compositor-fbdev.c

@@ -52,6 +52,7 @@ struct fbdev_compositor {
 
 	struct udev *udev;
 	struct tty *tty;
+	struct udev_input input;
 };
 
 struct fbdev_screeninfo {
@@ -751,11 +752,8 @@ static void
 fbdev_compositor_destroy(struct weston_compositor *base)
 {
 	struct fbdev_compositor *compositor = to_fbdev_compositor(base);
-	struct udev_input *input, *next;
 
-	/* Destroy all inputs. */
-	wl_list_for_each_safe(input, next, &compositor->base.seat_list, base.link)
-		udev_input_destroy(input);
+	udev_input_destroy(&compositor->input);
 
 	/* Destroy the output. */
 	weston_compositor_shutdown(&compositor->base);
@@ -771,7 +769,6 @@ static void
 vt_func(struct weston_compositor *base, int event)
 {
 	struct fbdev_compositor *compositor = to_fbdev_compositor(base);
-	struct udev_input *input;
 	struct weston_output *output;
 
 	switch (event) {
@@ -786,13 +783,11 @@ vt_func(struct weston_compositor *base, int event)
 
 		weston_compositor_damage_all(&compositor->base);
 
-		wl_list_for_each(input, &compositor->base.seat_list, base.link)
-			udev_input_enable(input, compositor->udev);
+		udev_input_enable(&compositor->input, compositor->udev);
 		break;
 	case TTY_LEAVE_VT:
 		weston_log("leaving VT\n");
-		wl_list_for_each(input, &compositor->base.seat_list, base.link)
-			udev_input_disable(input);
+		udev_input_disable(&compositor->input);
 
 		wl_list_for_each(output, &compositor->base.output_list, link) {
 			fbdev_output_disable(output);
@@ -884,7 +879,7 @@ fbdev_compositor_create(struct wl_display *display, int *argc, char *argv[],
 	if (fbdev_output_create(compositor, param->device) < 0)
 		goto out_pixman;
 
-	udev_input_create(&compositor->base, compositor->udev, seat);
+	udev_input_init(&compositor->input, &compositor->base, compositor->udev, seat);
 
 	return &compositor->base;
 

src/udev-seat.c

@@ -260,16 +260,10 @@ drm_led_update(struct weston_seat *seat_base, enum weston_led leds)
 		evdev_led_update(device, leds);
 }
 
-struct udev_input *
-udev_input_create(struct weston_compositor *c, struct udev *udev,
+int
+udev_input_init(struct udev_input *input, struct weston_compositor *c, struct udev *udev,
 		const char *seat_id)
 {
-	struct udev_input *input;
-
-	input = malloc(sizeof *input);
-	if (input == NULL)
-		return NULL;
-
 	memset(input, 0, sizeof *input);
 	weston_seat_init(&input->base, c, "default");
 	input->base.led_update = drm_led_update;
@@ -279,12 +273,11 @@ udev_input_create(struct weston_compositor *c, struct udev *udev,
 	if (udev_input_enable(input, udev) < 0)
 		goto err;
 
-	return input;
+	return 0;
 
  err:
 	free(input->seat_id);
-	free(input);
-	return NULL;
+	return -1;
 }
 
 void
@@ -294,5 +287,4 @@ udev_input_destroy(struct udev_input *input)
 
 	weston_seat_release(&input->base);
 	free(input->seat_id);
-	free(input);
 }

src/udev-seat.h

@@ -37,9 +37,10 @@ struct udev_input {
 
 int udev_input_enable(struct udev_input *input, struct udev *udev);
 void udev_input_disable(struct udev_input *input);
-struct udev_input *udev_input_create(struct weston_compositor *c,
-				   struct udev *udev,
-				   const char *seat_id);
+int udev_input_init(struct udev_input *input,
+		    struct weston_compositor *c,
+		    struct udev *udev,
+		    const char *seat_id);
 void udev_input_destroy(struct udev_input *input);
 
 #endif