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client: Add WL_MAP_ENTRY_ZOMBIE flag

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Add a new map entry flag to indicate that the object received is valid,
but a zombie. Previously this relied on a fixed object pointer, but
future patches in this series will have map entries returning either
NULL, or a different structure type entirely, for zombie objects.

wl_object_is_zombie() now solely uses the new flag to determine whether
or not the object is a zombie.

[daniels: Extracted from Derek's bespoke-zombie patch as an intermediate
          step.]

Signed-off-by: Derek Foreman <derekf@osg.samsung.com>
Reviewed-by: Daniel Stone <daniels@collabora.com>
This commit is contained in:
Derek Foreman 2017-12-28 15:22:25 +00:00 • committed by Daniel Stone
parent 69fab4fffc
commit 07d7a9968d
3 changed files with 21 additions and 9 deletions
Download patch file Download diff file Expand all files Collapse all files

13
src/connection.c
View file

@ -834,9 +834,18 @@ wl_connection_demarshal(struct wl_connection *connection,
bool
wl_object_is_zombie(struct wl_map *map, uint32_t id)
{
struct wl_object *object = wl_map_lookup(map, id);
uint32_t flags;
return (object == WL_ZOMBIE_OBJECT);
/* Zombie objects only exist on the client side. */
if (map->side == WL_MAP_SERVER_SIDE)
return false;
/* Zombie objects can only have been created by the client. */
if (id >= WL_SERVER_ID_START)
return false;
flags = wl_map_lookup_flags(map, id);
return !!(flags & WL_MAP_ENTRY_ZOMBIE);
}
int

14
src/wayland-client.c
View file

@ -405,15 +405,17 @@ wl_proxy_create_for_id(struct wl_proxy *factory,
static void
proxy_destroy(struct wl_proxy *proxy)
{
if (proxy->flags & WL_PROXY_FLAG_ID_DELETED)
if (proxy->flags & WL_PROXY_FLAG_ID_DELETED) {
wl_map_remove(&proxy->display->objects, proxy->object.id);
else if (proxy->object.id < WL_SERVER_ID_START)
wl_map_insert_at(&proxy->display->objects, 0,
proxy->object.id, WL_ZOMBIE_OBJECT);
else
} else if (proxy->object.id < WL_SERVER_ID_START) {
wl_map_insert_at(&proxy->display->objects,
WL_MAP_ENTRY_ZOMBIE,
proxy->object.id,
WL_ZOMBIE_OBJECT);
} else {
wl_map_insert_at(&proxy->display->objects, 0,
proxy->object.id, NULL);
}
proxy->flags |= WL_PROXY_FLAG_DESTROYED;

3
src/wayland-private.h
View file

@ -69,7 +69,8 @@ wl_interface_equal(const struct wl_interface *iface1,
* flags. If more flags are ever added, the implementation of wl_map will have
* to change to allow for new flags */
enum wl_map_entry_flags {
WL_MAP_ENTRY_LEGACY = (1 << 0)
WL_MAP_ENTRY_LEGACY = (1 << 0), /* Server side only */
WL_MAP_ENTRY_ZOMBIE = (1 << 0) /* Client side only */
};
struct wl_map {