+using std::experimental::optional;
+
+struct id_allocator {
+ constexpr static const unsigned id_shift = 22;
+ constexpr static const unsigned id_mask = (1 << id_shift) - 1;
+
+ unsigned next = 1;
+
+ // Surfaces that where requested but not yet created
+ std::unordered_map<unsigned, std::string> id2name;
+ // std::unordered_set<unsigned> pending_surfaces;
+ std::unordered_map<std::string, unsigned> name2id;
+
+ id_allocator(id_allocator const &) = delete;
+ id_allocator(id_allocator &&) = delete;
+ id_allocator &operator=(id_allocator const &);
+ id_allocator &operator=(id_allocator &&) = delete;
+
+ // Insert and return a new ID
+ unsigned generate_id(std::string const &name) {
+ unsigned sid = this->next++;
+ this->id2name[sid] = name;
+ // this->pending_surfaces.insert({sid});
+ this->name2id[name] = sid;
+ logdebug("allocated new id %u with name %s", sid, name.c_str());
+ return sid;
+ }
+
+ // Lookup by ID or by name
+ optional<unsigned> lookup(std::string const &name) const {
+ auto i = this->name2id.find(name);
+ return i == this->name2id.end() ? nullopt : optional<unsigned>(i->second);
+ }
+
+ optional<std::string> lookup(unsigned id) const {
+ auto i = this->id2name.find(id);
+ return i == this->id2name.end() ? nullopt
+ : optional<std::string>(i->second);
+ }
+
+ // Remove a surface id and name
+ // I don't think I will need this, do I?
+ void remove_id(std::string const &name) {
+ auto i = this->name2id.find(name);
+ if (i != this->name2id.end()) {
+ this->id2name.erase(i->second);
+ this->name2id.erase(i);
+ }
+ }
+
+ void remove_id(unsigned id) {
+ auto i = this->id2name.find(id);
+ if (i != this->id2name.end()) {
+ this->name2id.erase(i->second);
+ this->id2name.erase(i);
+ }
+ }
+};
+
+struct App {
+ struct binding_api api;
+ struct controller_hooks chooks;
+
+ // This is the one thing, we do not own.
+ struct wl::display *display;
+
+ std::unique_ptr<struct genivi::controller> controller;
+ std::vector<std::unique_ptr<struct wl::output>> outputs;
+
+ struct config config;
+
+ // track current layouts separately
+ layer_map layers;
+
+ // ID allocation and proxy methods for lookup
+ struct id_allocator id_alloc;
+
+ // Set by AFB API when wayland events need to be dispatched
+ std::atomic<bool> pending_events;
+
+ std::vector<int> pending_end_draw;
+
+ Policy policy;
+
+ explicit App(wl::display *d);
+ ~App();
+
+ App(App const &) = delete;
+ App &operator=(App const &) = delete;
+ App(App &&) = delete;
+ App &operator=(App &&) = delete;
+
+ int init();
+
+ int dispatch_events();
+ int dispatch_pending_events();
+
+ void set_pending_events();
+
+ result<int> api_request_surface(char const *drawing_name);
+ char const *api_activate_surface(char const *drawing_name);
+ char const *api_deactivate_surface(char const *drawing_name);
+ char const *api_enddraw(char const *drawing_name);
+ void api_ping();
+
+ // Events from the compositor we are interested in
+ void surface_created(uint32_t surface_id);
+ void surface_removed(uint32_t surface_id);
+
+private:
+ optional<int> lookup_id(char const *name);
+ optional<std::string> lookup_name(int id);
+
+ bool pop_pending_events();
+
+ void enqueue_flushdraw(int surface_id);
+ void check_flushdraw(int surface_id);
+
+ int init_layers();