export-dmabuf-v1: add missing destroy request handler

Also document lists in the header file.

include/wlr/types/wlr_export_dmabuf_v1.h

@@ -13,12 +13,22 @@
 #include <wayland-server.h>
 #include <wlr/render/dmabuf.h>
 
-struct wlr_export_dmabuf_manager_v1;
+struct wlr_export_dmabuf_manager_v1 {
+	struct wl_global *global;
+	struct wl_list resources; // wl_resource_get_link
+	struct wl_list frames; // wlr_export_dmabuf_frame_v1::link
+
+	struct wl_listener display_destroy;
+
+	struct {
+		struct wl_signal destroy;
+	} events;
+};
 
 struct wlr_export_dmabuf_frame_v1 {
 	struct wl_resource *resource;
 	struct wlr_export_dmabuf_manager_v1 *manager;
-	struct wl_list link;
+	struct wl_list link; // wlr_export_dmabuf_manager_v1::frames
 
 	struct wlr_dmabuf_attributes attribs;
 	struct wlr_output *output;
@@ -28,18 +38,6 @@ struct wlr_export_dmabuf_frame_v1 {
 	struct wl_listener output_swap_buffers;
 };
 
-struct wlr_export_dmabuf_manager_v1 {
-	struct wl_global *global;
-	struct wl_list resources;
-	struct wl_list frames;
-
-	struct wl_listener display_destroy;
-
-	struct {
-		struct wl_signal destroy;
-	} events;
-};
-
 struct wlr_export_dmabuf_manager_v1 *wlr_export_dmabuf_manager_v1_create(
 	struct wl_display *display);
 void wlr_export_dmabuf_manager_v1_destroy(

types/wlr_export_dmabuf_v1.c

@@ -5,8 +5,9 @@
 #include <wlr/render/dmabuf.h>
 #include <wlr/types/wlr_export_dmabuf_v1.h>
 #include <wlr/types/wlr_output.h>
-#include "wlr-export-dmabuf-unstable-v1-protocol.h"
 #include <wlr/util/log.h>
+#include "util/signal.h"
+#include "wlr-export-dmabuf-unstable-v1-protocol.h"
 
 #define EXPORT_DMABUF_MANAGER_VERSION 1
 
@@ -146,8 +147,14 @@ static void manager_handle_capture_output(struct wl_client *client,
 	frame->output_swap_buffers.notify = frame_output_handle_swap_buffers;
 }
 
+static void manager_handle_destroy(struct wl_client *client,
+		struct wl_resource *manager_resource) {
+	wl_resource_destroy(manager_resource);
+}
+
 static const struct zwlr_export_dmabuf_manager_v1_interface manager_impl = {
 	.capture_output = manager_handle_capture_output,
+	.destroy = manager_handle_destroy,
 };
 
 static void manager_handle_resource_destroy(struct wl_resource *resource) {
@@ -185,6 +192,7 @@ struct wlr_export_dmabuf_manager_v1 *wlr_export_dmabuf_manager_v1_create(
 	}
 	wl_list_init(&manager->resources);
 	wl_list_init(&manager->frames);
+	wl_signal_init(&manager->events.destroy);
 
 	manager->global = wl_global_create(display,
 		&zwlr_export_dmabuf_manager_v1_interface, EXPORT_DMABUF_MANAGER_VERSION,
@@ -205,6 +213,7 @@ void wlr_export_dmabuf_manager_v1_destroy(
 	if (manager == NULL) {
 		return;
 	}
+	wlr_signal_emit_safe(&manager->events.destroy, manager);
 	wl_list_remove(&manager->display_destroy.link);
 	wl_global_destroy(manager->global);
 	struct wl_resource *resource, *resource_tmp;