[PATCH weston v3] libweston-desktop/xdg-shell: Properly handle ack_configure

Jonas Ã…dahl jadahl at gmail.com
Thu Jul 20 08:24:00 UTC 2017


On Thu, Jul 20, 2017 at 09:17:23AM +0200, Quentin Glidic wrote:
> From: Quentin Glidic <sardemff7+git at sardemff7.net>
> 
> Now we keep track of serial->state association and we discard the states
> that the client ignored.
> 
> Signed-off-by: Quentin Glidic <sardemff7+git at sardemff7.net>
> ---
> v3:
>  Fixed a tiny style issue
>  Now send an error on wrong serial

Noticed one more thing I missed in the previous review: cleanup of the
pending configure allocations on surface destruction.


Jonas

> 
>  libweston-desktop/xdg-shell-v5.c | 56 ++++++++++++++++++++++++++----
>  libweston-desktop/xdg-shell-v6.c | 75 ++++++++++++++++++++++++++++++++++------
>  2 files changed, 114 insertions(+), 17 deletions(-)
> 
> diff --git a/libweston-desktop/xdg-shell-v5.c b/libweston-desktop/xdg-shell-v5.c
> index b32b7812..f428e02e 100644
> --- a/libweston-desktop/xdg-shell-v5.c
> +++ b/libweston-desktop/xdg-shell-v5.c
> @@ -46,6 +46,13 @@ struct weston_desktop_xdg_surface_state {
>  	bool activated;
>  };
>  
> +struct weston_desktop_xdg_surface_configure {
> +	struct wl_list link; /* weston_desktop_xdg_surface::configure_list */
> +	uint32_t serial;
> +	struct weston_desktop_xdg_surface_state state;
> +	struct weston_size size;
> +};
> +
>  struct weston_desktop_xdg_surface {
>  	struct wl_resource *resource;
>  	struct weston_desktop_surface *surface;
> @@ -53,7 +60,7 @@ struct weston_desktop_xdg_surface {
>  	bool added;
>  	struct wl_event_source *add_idle;
>  	struct wl_event_source *configure_idle;
> -	uint32_t configure_serial;
> +	struct wl_list configure_list; /* weston_desktop_xdg_surface_configure::link */
>  	struct {
>  		struct weston_desktop_xdg_surface_state state;
>  		struct weston_size size;
> @@ -94,13 +101,26 @@ static void
>  weston_desktop_xdg_surface_send_configure(void *data)
>  {
>  	struct weston_desktop_xdg_surface *surface = data;
> +	struct weston_desktop_xdg_surface_configure *configure;
>  	uint32_t *s;
>  	struct wl_array states;
>  
>  	surface->configure_idle = NULL;
>  
> -	surface->configure_serial =
> +	configure = zalloc(sizeof(struct weston_desktop_xdg_surface_configure));
> +	if (configure == NULL) {
> +		struct weston_desktop_client *client =
> +			weston_desktop_surface_get_client(surface->surface);
> +		struct wl_client *wl_client =
> +			weston_desktop_client_get_client(client);
> +		wl_client_post_no_memory(wl_client);
> +		return;
> +	}
> +	wl_list_insert(surface->configure_list.prev, &configure->link);
> +	configure->serial =
>  		wl_display_next_serial(weston_desktop_get_display(surface->desktop));
> +	configure->state = surface->pending.state;
> +	configure->size = surface->pending.size;
>  
>  	wl_array_init(&states);
>  	if (surface->pending.state.maximized) {
> @@ -124,7 +144,7 @@ weston_desktop_xdg_surface_send_configure(void *data)
>  				   surface->pending.size.width,
>  				   surface->pending.size.height,
>  				   &states,
> -				   surface->configure_serial);
> +				   configure->serial);
>  
>  	wl_array_release(&states);
>  };
> @@ -443,12 +463,34 @@ weston_desktop_xdg_surface_protocol_ack_configure(struct wl_client *wl_client,
>  		wl_resource_get_user_data(resource);
>  	struct weston_desktop_xdg_surface *surface =
>  		weston_desktop_surface_get_implementation_data(dsurface);
> -
> -	if (surface->configure_serial != serial)
> +	struct weston_desktop_xdg_surface_configure *configure, *temp;
> +	bool found = false;
> +
> +	wl_list_for_each_safe(configure, temp, &surface->configure_list, link) {
> +		if (configure->serial < serial) {
> +			wl_list_remove(&configure->link);
> +			free(configure);
> +		} else if (configure->serial == serial) {
> +			wl_list_remove(&configure->link);
> +			found = true;
> +		}
> +		break;
> +	}
> +	if (!found) {
> +		struct weston_desktop_client *client =
> +			weston_desktop_surface_get_client(dsurface);
> +		struct wl_resource *client_resource =
> +			weston_desktop_client_get_resource(client);
> +		wl_resource_post_error(client_resource,
> +				       XDG_SHELL_ERROR_DEFUNCT_SURFACES,
> +				       "Wrong configure serial: %u", serial);
>  		return;
> +	}
> +
> +	surface->next.state = configure->state;
> +	surface->next.size = configure->size;
>  
> -	surface->next.state = surface->pending.state;
> -	surface->next.size = surface->pending.size;
> +	free(configure);
>  }
>  
>  static void
> diff --git a/libweston-desktop/xdg-shell-v6.c b/libweston-desktop/xdg-shell-v6.c
> index f5e46daa..cd02ec76 100644
> --- a/libweston-desktop/xdg-shell-v6.c
> +++ b/libweston-desktop/xdg-shell-v6.c
> @@ -69,7 +69,7 @@ struct weston_desktop_xdg_surface {
>  	struct weston_desktop_surface *desktop_surface;
>  	bool configured;
>  	struct wl_event_source *configure_idle;
> -	uint32_t configure_serial;
> +	struct wl_list configure_list; /* weston_desktop_xdg_surface_configure::link */
>  
>  	bool has_next_geometry;
>  	struct weston_geometry next_geometry;
> @@ -77,6 +77,11 @@ struct weston_desktop_xdg_surface {
>  	enum weston_desktop_xdg_surface_role role;
>  };
>  
> +struct weston_desktop_xdg_surface_configure {
> +	struct wl_list link; /* weston_desktop_xdg_surface::configure_list */
> +	uint32_t serial;
> +};
> +
>  struct weston_desktop_xdg_toplevel_state {
>  	bool maximized;
>  	bool fullscreen;
> @@ -84,6 +89,12 @@ struct weston_desktop_xdg_toplevel_state {
>  	bool activated;
>  };
>  
> +struct weston_desktop_xdg_toplevel_configure {
> +	struct weston_desktop_xdg_surface_configure base;
> +	struct weston_desktop_xdg_toplevel_state state;
> +	struct weston_size size;
> +};
> +
>  struct weston_desktop_xdg_toplevel {
>  	struct weston_desktop_xdg_surface base;
>  
> @@ -115,6 +126,7 @@ struct weston_desktop_xdg_popup {
>  };
>  
>  #define weston_desktop_surface_role_biggest_size (sizeof(struct weston_desktop_xdg_toplevel))
> +#define weston_desktop_surface_configure_biggest_size (sizeof(struct weston_desktop_xdg_toplevel))
>  
>  
>  static struct weston_geometry
> @@ -422,10 +434,11 @@ weston_desktop_xdg_toplevel_protocol_resize(struct wl_client *wl_client,
>  }
>  
>  static void
> -weston_desktop_xdg_toplevel_ack_configure(struct weston_desktop_xdg_toplevel *toplevel)
> +weston_desktop_xdg_toplevel_ack_configure(struct weston_desktop_xdg_toplevel *toplevel,
> +					  struct weston_desktop_xdg_toplevel_configure *configure)
>  {
> -	toplevel->next.state = toplevel->pending.state;
> -	toplevel->next.size = toplevel->pending.size;
> +	toplevel->next.state = configure->state;
> +	toplevel->next.size = configure->size;
>  }
>  
>  static void
> @@ -529,11 +542,15 @@ weston_desktop_xdg_toplevel_protocol_set_minimized(struct wl_client *wl_client,
>  }
>  
>  static void
> -weston_desktop_xdg_toplevel_send_configure(struct weston_desktop_xdg_toplevel *toplevel)
> +weston_desktop_xdg_toplevel_send_configure(struct weston_desktop_xdg_toplevel *toplevel,
> +					   struct weston_desktop_xdg_toplevel_configure *configure)
>  {
>  	uint32_t *s;
>  	struct wl_array states;
>  
> +	configure->state = toplevel->pending.state;
> +	configure->size = toplevel->pending.size;
> +
>  	wl_array_init(&states);
>  	if (toplevel->pending.state.maximized) {
>  		s = wl_array_add(&states, sizeof(uint32_t));
> @@ -848,9 +865,21 @@ static void
>  weston_desktop_xdg_surface_send_configure(void *user_data)
>  {
>  	struct weston_desktop_xdg_surface *surface = user_data;
> +	struct weston_desktop_xdg_surface_configure *configure;
>  
>  	surface->configure_idle = NULL;
> -	surface->configure_serial =
> +
> +	configure = zalloc(weston_desktop_surface_configure_biggest_size);
> +	if (configure == NULL) {
> +		struct weston_desktop_client *client =
> +			weston_desktop_surface_get_client(surface->desktop_surface);
> +		struct wl_client *wl_client =
> +			weston_desktop_client_get_client(client);
> +		wl_client_post_no_memory(wl_client);
> +		return;
> +	}
> +	wl_list_insert(surface->configure_list.prev, &configure->link);
> +	configure->serial =
>  		wl_display_next_serial(weston_desktop_get_display(surface->desktop));
>  
>  	switch (surface->role) {
> @@ -858,14 +887,15 @@ weston_desktop_xdg_surface_send_configure(void *user_data)
>  		assert(0 && "not reached");
>  		break;
>  	case WESTON_DESKTOP_XDG_SURFACE_ROLE_TOPLEVEL:
> -		weston_desktop_xdg_toplevel_send_configure((struct weston_desktop_xdg_toplevel *) surface);
> +		weston_desktop_xdg_toplevel_send_configure((struct weston_desktop_xdg_toplevel *) surface,
> +							   (struct weston_desktop_xdg_toplevel_configure *) configure);
>  		break;
>  	case WESTON_DESKTOP_XDG_SURFACE_ROLE_POPUP:
>  		weston_desktop_xdg_popup_send_configure((struct weston_desktop_xdg_popup *) surface);
>  		break;
>  	}
>  
> -	zxdg_surface_v6_send_configure(surface->resource, surface->configure_serial);
> +	zxdg_surface_v6_send_configure(surface->resource, configure->serial);
>  }
>  
>  static bool
> @@ -1060,12 +1090,32 @@ weston_desktop_xdg_surface_protocol_ack_configure(struct wl_client *wl_client,
>  		wl_resource_get_user_data(resource);
>  	struct weston_desktop_xdg_surface *surface =
>  		weston_desktop_surface_get_implementation_data(dsurface);
> +	struct weston_desktop_xdg_surface_configure *configure, *temp;
> +	bool found = false;
>  
>  	if (!weston_desktop_xdg_surface_check_role(surface))
>  		return;
>  
> -	if (surface->configure_serial != serial)
> +	wl_list_for_each_safe(configure, temp, &surface->configure_list, link) {
> +		if (configure->serial < serial) {
> +			wl_list_remove(&configure->link);
> +			free(configure);
> +		} else if (configure->serial == serial) {
> +			wl_list_remove(&configure->link);
> +			found = true;
> +		}
> +		break;
> +	}
> +	if (!found) {
> +		struct weston_desktop_client *client =
> +			weston_desktop_surface_get_client(dsurface);
> +		struct wl_resource *client_resource =
> +			weston_desktop_client_get_resource(client);
> +		wl_resource_post_error(client_resource,
> +				       ZXDG_SHELL_V6_ERROR_INVALID_SURFACE_STATE,
> +				       "Wrong configure serial: %u", serial);
>  		return;
> +	}
>  
>  	surface->configured = true;
>  
> @@ -1074,11 +1124,14 @@ weston_desktop_xdg_surface_protocol_ack_configure(struct wl_client *wl_client,
>  		assert(0 && "not reached");
>  		break;
>  	case WESTON_DESKTOP_XDG_SURFACE_ROLE_TOPLEVEL:
> -		weston_desktop_xdg_toplevel_ack_configure((struct weston_desktop_xdg_toplevel *) surface);
> +		weston_desktop_xdg_toplevel_ack_configure((struct weston_desktop_xdg_toplevel *) surface,
> +							  (struct weston_desktop_xdg_toplevel_configure *) configure);
>  		break;
>  	case WESTON_DESKTOP_XDG_SURFACE_ROLE_POPUP:
>  		break;
>  	}
> +
> +	free(configure);
>  }
>  
>  static void
> @@ -1290,6 +1343,8 @@ weston_desktop_xdg_shell_protocol_get_xdg_surface(struct wl_client *wl_client,
>  				       "xdg_surface must not have a buffer at creation");
>  		return;
>  	}
> +
> +	wl_list_init(&surface->configure_list);
>  }
>  
>  static void
> -- 
> 2.13.3
> 


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