[PATCH 3/4] xwayland: Keep a list of wayland globals

[Marek Chalupa]

On Tue, May 12, 2015 at 7:21 PM, Dima Ryazanov <dima at gmail.com> wrote:

> The logic is pretty much copied from weston's clients/window.c.
>
> Signed-off-by: Dima Ryazanov <dima at gmail.com>
> ---
>  hw/xwayland/xwayland.c | 25 ++++++++++++++++++++++++-
>  hw/xwayland/xwayland.h |  8 ++++++++
>  2 files changed, 32 insertions(+), 1 deletion(-)
>
> diff --git a/hw/xwayland/xwayland.c b/hw/xwayland/xwayland.c
> index 7e8d667..e99fbac 100644
> --- a/hw/xwayland/xwayland.c
> +++ b/hw/xwayland/xwayland.c
> @@ -383,6 +383,17 @@ registry_global(void *data, struct wl_registry
> *registry, uint32_t id,
>                  const char *interface, uint32_t version)
>  {
>      struct xwl_screen *xwl_screen = data;
> +    struct xwl_global *xwl_global;
> +
> +    xwl_global = calloc(sizeof *xwl_global, 1);
> +    if (xwl_global == NULL) {
> +        ErrorF("registry_global ENOMEM\n");
> +        return;
> +    }
> +    xwl_global->name = id;
> +    xwl_global->interface = strdup(interface);
>

You should probably check if the strdup succeeds here. In the following
patch you do
  if (strcmp(xwl_global->interface, "wl_output") == 0)
and if the strdup returns NULL, then this contition will be false even
thoug it should be true.



> +    xwl_global->version = version;
> +    xorg_list_add(&xwl_global->link, &xwl_screen->global_list);
>
>      if (strcmp(interface, "wl_compositor") == 0) {
>          xwl_screen->compositor =
> @@ -410,7 +421,18 @@ registry_global(void *data, struct wl_registry
> *registry, uint32_t id,
>  static void
>  global_remove(void *data, struct wl_registry *registry, uint32_t name)
>  {
> -    /* Nothing to do here, wl_compositor and wl_shm should not be removed
> */
> +    struct xwl_screen *xwl_screen = data;
> +    struct xwl_global *xwl_global, *next_xwl_global;
> +
> +    xorg_list_for_each_entry_safe(xwl_global, next_xwl_global,
> +                                  &xwl_screen->global_list, link) {
> +        if (xwl_global->name != name)
> +            continue;
> +
> +        xorg_list_del(&xwl_global->link);
> +        free(xwl_global->interface);
> +        free(xwl_global);
>

Here a break would be handy, so that we won't iterate over the rest of
globals after we found the one we need.

+    }
>  }
>
>  static const struct wl_registry_listener registry_listener = {
> @@ -562,6 +584,7 @@ xwl_screen_init(ScreenPtr pScreen, int argc, char
> **argv)
>              listen_on_fds(xwl_screen);
>      }
>
> +    xorg_list_init(&xwl_screen->global_list);
>      xorg_list_init(&xwl_screen->output_list);
>      xorg_list_init(&xwl_screen->seat_list);
>      xorg_list_init(&xwl_screen->damage_window_list);
> diff --git a/hw/xwayland/xwayland.h b/hw/xwayland/xwayland.h
> index cfb343d..2ba5312 100644
> --- a/hw/xwayland/xwayland.h
> +++ b/hw/xwayland/xwayland.h
> @@ -64,6 +64,7 @@ struct xwl_screen {
>      UnrealizeWindowProcPtr UnrealizeWindow;
>      XYToWindowProcPtr XYToWindow;
>
> +    struct xorg_list global_list;
>      struct xorg_list output_list;
>      struct xorg_list seat_list;
>      struct xorg_list damage_window_list;
> @@ -95,6 +96,13 @@ struct xwl_screen {
>      struct glamor_context *glamor_ctx;
>  };
>
> +struct xwl_global {
> +    uint32_t name;
> +    char *interface;
> +    uint32_t version;
> +    struct xorg_list link;
> +};
> +
>  struct xwl_window {
>      struct xwl_screen *xwl_screen;
>      struct wl_surface *surface;
> --
> 2.4.0
>
> _______________________________________________
> wayland-devel mailing list
> wayland-devel at lists.freedesktop.org
> http://lists.freedesktop.org/mailman/listinfo/wayland-devel
>

Isn't storing all globals redundant for this purpose? Couldn't we add the
name (id) into struct xwl_output and then
iterate just over the output_list?

Thanks,
Marek
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