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wayland-surface: Don't crash if a client destroys a buffer in use

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This is considered "undefined" by upstream. Right now GTK+ does this
a lot, so we shouldn't crash. Let's make them crash instead and send
them an error instead.
This commit is contained in:
Jasper St. Pierre 2014-02-03 18:36:46 -05:00
parent 0a9754f305
commit 3e98ffaf99
2 changed files with 24 additions and 3 deletions
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23
src/wayland/meta-wayland-surface.c
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@ -71,6 +71,17 @@ typedef struct
struct wl_listener sibling_destroy_listener;
} MetaWaylandSubsurfacePlacementOp;
static void
surface_handle_buffer_destroy (struct wl_listener *listener, void *data)
{
MetaWaylandSurface *surface = wl_container_of (listener, surface, buffer_destroy_listener);
wl_resource_post_error (surface->resource, WL_DISPLAY_ERROR_INVALID_OBJECT,
"Destroyed buffer while it was attached to the surface");
surface->buffer = NULL;
wl_list_remove (&surface->buffer_destroy_listener.link);
}
static void
surface_set_buffer (MetaWaylandSurface *surface,
MetaWaylandBuffer *buffer)
@ -79,12 +90,18 @@ surface_set_buffer (MetaWaylandSurface *surface,
return;
if (surface->buffer)
meta_wayland_buffer_unref (surface->buffer);
{
meta_wayland_buffer_unref (surface->buffer);
wl_list_remove (&surface->buffer_destroy_listener.link);
}
surface->buffer = buffer;
if (surface->buffer)
meta_wayland_buffer_ref (surface->buffer);
{
meta_wayland_buffer_ref (surface->buffer);
wl_signal_add (&surface->buffer->destroy_signal, &surface->buffer_destroy_listener);
}
}
static void
@ -621,6 +638,8 @@ meta_wayland_surface_create (MetaWaylandCompositor *compositor,
double_buffered_state_init (&surface->pending);
surface->buffer_destroy_listener.notify = surface_handle_buffer_destroy;
surface->surface_actor = g_object_ref_sink (meta_surface_actor_new ());
return surface;
}

4
src/wayland/meta-wayland-surface.h
View file

@ -71,7 +71,6 @@ struct _MetaWaylandSurface
{
struct wl_resource *resource;
MetaWaylandCompositor *compositor;
MetaWaylandBuffer *buffer;
MetaSurfaceActor *surface_actor;
MetaWindow *window;
MetaWaylandSurfaceExtension xdg_surface;
@ -79,6 +78,9 @@ struct _MetaWaylandSurface
MetaWaylandSurfaceExtension gtk_surface;
MetaWaylandSurfaceExtension subsurface;
MetaWaylandBuffer *buffer;
struct wl_listener buffer_destroy_listener;
GList *subsurfaces;
struct {