App Loading via Loader (#1)

* app loading wip

* various improvements

irq/isr stuff is now working
lvgl locking where needed
hello world now uses proper mutex for app unlocking
etc?

* various improvements

* cmsis_esp improvements

* implement interrupts

components/nanobake/CMakeLists.txt

@@ -1,10 +1,9 @@
 idf_component_register(
     SRC_DIRS "src"
-    "src/applications"
-    "src/applications/system/system_info"
-    "src/applications/services/desktop"
-    "src/applications/services/loader"
-    "src/applications/services/gui"
+    "src/apps/system/system_info"
+    "src/apps/services/desktop"
+    "src/apps/services/loader"
+    "src/apps/services/gui"
     INCLUDE_DIRS "src"
     REQUIRES esp_lvgl_port esp_lcd esp_lcd_touch driver mlib cmsis_core furi
 )

components/nanobake/src/app.c

@@ -1,19 +0,0 @@
-#include "app_i.h"
-#include "check.h"
-
-const char* prv_type_service = "service";
-const char* prv_type_system = "system";
-const char* prv_type_user = "user";
-
-const char* nb_app_type_to_string(AppType type) {
-    switch (type) {
-        case SERVICE:
-            return prv_type_service;
-        case SYSTEM:
-            return prv_type_system;
-        case USER:
-            return prv_type_user;
-        default:
-            furi_crash();
-    }
-}

components/nanobake/src/app.h

@@ -1,41 +0,0 @@
-#pragma once
-
-#include "esp_err.h"
-#include "lvgl.h"
-#include <stdio.h>
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-#define NB_APP_ID_LENGTH 32
-#define NB_APP_NAME_LENGTH 32
-
-typedef enum {
-    SERVICE,
-    SYSTEM,
-    USER
-} AppType;
-
-typedef enum {
-    NB_TASK_PRIORITY_DEFAULT = 10
-} AppPriority;
-
-typedef enum {
-    NB_TASK_STACK_SIZE_DEFAULT = 2048
-} AppStackSize;
-
-typedef int32_t (*AppEntryPoint)(void _Nonnull* parameter);
-
-typedef struct {
-    const char id[NB_APP_ID_LENGTH];
-    const char name[NB_APP_NAME_LENGTH];
-    const AppType type;
-    const AppEntryPoint _Nullable entry_point;
-    const AppStackSize stack_size;
-    const AppPriority priority;
-} App;
-
-#ifdef __cplusplus
-}
-#endif

components/nanobake/src/app_i.h

@@ -1,13 +0,0 @@
-#pragma once
-
-#include "app.h"
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-const char* nb_app_type_to_string(AppType type);
-
-#ifdef __cplusplus
-}
-#endif

components/nanobake/src/applications/applications.c

@@ -1,28 +0,0 @@
-#include "applications_i.h"
-
-// System services
-extern const App desktop_app;
-extern const App gui_app;
-extern const App loader_app;
-
-// System apps
-extern const App system_info_app;
-
-const App* const NANOBAKE_SERVICES[] = {
-    &desktop_app,
-    &gui_app,
-    &loader_app
-};
-
-const size_t NANOBAKE_SERVICES_COUNT = sizeof(NANOBAKE_SERVICES) / sizeof(App*);
-
-const App* const NANOBAKE_SYSTEM_APPS[] = {
-    &system_info_app
-};
-
-const size_t NANOBAKE_SYSTEM_APPS_COUNT = sizeof(NANOBAKE_SYSTEM_APPS) / sizeof(App*);
-
-const OnSystemStart NANOBAKE_ON_SYSTEM_START[] = {
-};
-
-const size_t NANOBAKE_ON_SYSTEM_START_COUNT = sizeof(NANOBAKE_ON_SYSTEM_START) / sizeof(OnSystemStart);

components/nanobake/src/applications/applications_i.h

@@ -1,23 +0,0 @@
-#pragma once
-
-#include "app.h"
-#include "devices.h"
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-typedef void (*OnSystemStart)(Devices* hardware);
-
-extern const App* const NANOBAKE_SERVICES[];
-extern const size_t NANOBAKE_SERVICES_COUNT;
-
-extern const App* const NANOBAKE_SYSTEM_APPS[];
-extern const size_t NANOBAKE_SYSTEM_APPS_COUNT;
-
-extern const OnSystemStart NANOBAKE_ON_SYSTEM_START[];
-extern const size_t NANOBAKE_ON_SYSTEM_START_COUNT;
-
-#ifdef __cplusplus
-}
-#endif

components/nanobake/src/applications/services/loader/loader.c

@@ -1,17 +0,0 @@
-#include "loader.h"
-#include "core_defines.h"
-
-static int32_t prv_loader_main(void* param) {
-    UNUSED(param);
-    printf("loader app init\n");
-    return 0;
-}
-
-const App loader_app = {
-    .id = "loader",
-    .name = "Loader",
-    .type = SERVICE,
-    .entry_point = &prv_loader_main,
-    .stack_size = NB_TASK_STACK_SIZE_DEFAULT,
-    .priority = NB_TASK_PRIORITY_DEFAULT
-};

components/nanobake/src/applications/services/loader/loader.h

@@ -1,13 +0,0 @@
-#pragma once
-
-#include "app.h"
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-extern const App loader_app;
-
-#ifdef __cplusplus
-}
-#endif

components/nanobake/src/applications/system/system_info/system_info.c

@@ -1,39 +0,0 @@
-#include "system_info.h"
-#include "core_defines.h"
-#include "nanobake.h"
-#include "thread.h"
-
-static int32_t system_info_entry_point(void* param) {
-    UNUSED(param);
-
-    // Wait for all apps to start
-    vTaskDelay(1000 / portTICK_PERIOD_MS);
-
-    size_t system_service_count = nanobake_get_app_thread_count();
-    printf("Running apps:\n");
-    for (int i = 0; i < system_service_count; ++i) {
-        FuriThreadId thread_id = nanobake_get_app_thread_id(i);
-        const char* appid = furi_thread_get_appid(thread_id);
-        const char* name = furi_thread_get_name(thread_id);
-        bool is_suspended = furi_thread_is_suspended(thread_id);
-        const char* status = is_suspended ? "suspended" : "active";
-        printf(" - [%s] %s (%s)\n", status, name, appid);
-    }
-
-    printf(
-        "Heap memory available: %d / %d\n",
-        heap_caps_get_free_size(MALLOC_CAP_DEFAULT),
-        heap_caps_get_total_size(MALLOC_CAP_DEFAULT)
-    );
-
-    return 0;
-}
-
-App system_info_app = {
-    .id = "systeminfo",
-    .name = "System Info",
-    .type = SYSTEM,
-    .entry_point = &system_info_entry_point,
-    .stack_size = NB_TASK_STACK_SIZE_DEFAULT,
-    .priority = NB_TASK_PRIORITY_DEFAULT
-};

components/nanobake/src/apps/services/desktop/desktop.c

@@ -1,6 +1,5 @@
 #include "desktop.h"
-#include "core_defines.h"
-#include "devices.h"
+#include "furi_extra_defines.h"
 
 static int32_t prv_desktop_main(void* param) {
     UNUSED(param);
@@ -8,11 +7,11 @@ static int32_t prv_desktop_main(void* param) {
     return 0;
 }
 
-const App desktop_app = {
+const AppManifest desktop_app = {
     .id = "desktop",
     .name = "Desktop",
-    .type = SERVICE,
+    .icon = NULL,
+    .type = AppTypeService,
     .entry_point = &prv_desktop_main,
-    .stack_size = NB_TASK_STACK_SIZE_DEFAULT,
-    .priority = NB_TASK_PRIORITY_DEFAULT
+    .stack_size = AppStackSizeNormal
 };

components/nanobake/src/apps/services/desktop/desktop.h

@@ -1,12 +1,12 @@
 #pragma once
 
-#include "app.h"
+#include "app_manifest.h"
 
 #ifdef __cplusplus
 extern "C" {
 #endif
 
-extern const App desktop_app;
+extern const AppManifest desktop_app;
 
 #ifdef __cplusplus
 }

components/nanobake/src/apps/services/gui/gui.c

@@ -1,5 +1,6 @@
 #include "check.h"
-#include "core_defines.h"
+#include "esp_lvgl_port.h"
+#include "furi_extra_defines.h"
 #include "gui_i.h"
 #include "record.h"
 
@@ -184,7 +185,11 @@ Gui* gui_alloc() {
     Gui* gui = malloc(sizeof(Gui));
     gui->thread_id = furi_thread_get_current_id();
     gui->mutex = furi_mutex_alloc(FuriMutexTypeNormal);
+
+    furi_check(lvgl_port_lock(100));
     gui->lvgl_parent = lv_scr_act();
+    lvgl_port_unlock();
+
     gui->lockdown = false;
     furi_check(gui->mutex);
     for (size_t i = 0; i < GuiLayerMAX; i++) {
@@ -231,11 +236,11 @@ __attribute((__noreturn__)) int32_t prv_gui_main(void* parameter) {
     }
 }
 
-const App gui_app = {
+const AppManifest gui_app = {
     .id = "gui",
     .name = "GUI",
-    .type = SERVICE,
+    .icon = NULL,
+    .type = AppTypeService,
     .entry_point = &prv_gui_main,
-    .stack_size = NB_TASK_STACK_SIZE_DEFAULT,
-    .priority = NB_TASK_PRIORITY_DEFAULT
+    .stack_size = AppStackSizeNormal
 };

components/nanobake/src/apps/services/gui/gui.h

@@ -1,22 +1,13 @@
 #pragma once
 
-#include "app.h"
-#include "lvgl.h"
+#include "app_manifest.h"
 #include "view_port.h"
 
 #ifdef __cplusplus
 extern "C" {
 #endif
 
-extern const App gui_app;
-
-/** Canvas Orientation */
-typedef enum {
-    CanvasOrientationHorizontal,
-    CanvasOrientationHorizontalFlip,
-    CanvasOrientationVertical,
-    CanvasOrientationVerticalFlip,
-} CanvasOrientation;
+extern const AppManifest gui_app;
 
 /** Gui layers */
 typedef enum {
@@ -36,7 +27,6 @@ typedef enum {
 typedef void (*GuiCanvasCommitCallback)(
     uint8_t* data,
     size_t size,
-    CanvasOrientation orientation,
     void* context
 );
 

components/nanobake/src/apps/services/gui/icon.c

@@ -0,0 +1,13 @@
+#include "icon_i.h"
+
+uint8_t icon_get_width(const Icon* instance) {
+    return instance->width;
+}
+
+uint8_t icon_get_height(const Icon* instance) {
+    return instance->height;
+}
+
+const uint8_t* icon_get_data(const Icon* instance) {
+    return instance->frames[0];
+}

components/nanobake/src/apps/services/gui/icon.h

@@ -0,0 +1,11 @@
+#pragma once
+
+#include <stdio.h>
+
+struct Icon {
+   const uint8_t width;
+   const uint8_t height;
+   const uint8_t frame_count;
+   const uint8_t frame_rate;
+   const uint8_t* const* frames;
+};

components/nanobake/src/apps/services/gui/icon_i.h

@@ -0,0 +1,10 @@
+#pragma once
+#include "icon.h"
+
+typedef struct {
+   const uint8_t width;
+   const uint8_t height;
+   const uint8_t frame_count;
+   const uint8_t frame_rate;
+   const uint8_t* const* frames;
+} Icon;

components/nanobake/src/apps/services/gui/view_port.c

@@ -2,6 +2,7 @@
 #include "gui.h"
 #include "gui_i.h"
 #include "view_port_i.h"
+#include "esp_lvgl_port.h"
 
 #define TAG "viewport"
 
@@ -88,7 +89,10 @@ void view_port_draw(ViewPort* view_port, lv_obj_t* parent) {
     furi_check(view_port->gui);
 
     if (view_port->draw_callback) {
+        furi_check(lvgl_port_lock(100));
         lv_obj_clean(parent);
+        lvgl_port_unlock();
+
         view_port->draw_callback(parent, view_port->draw_callback_context);
     }
 

components/nanobake/src/apps/services/loader/loader.c

@@ -0,0 +1,290 @@
+#include "loader.h"
+#include "app_i.h"
+#include "app_manifest.h"
+#include "app_manifest_registry.h"
+#include "loader_i.h"
+#include <sys/cdefs.h>
+#include "esp_heap_caps.h"
+
+#define TAG "Loader"
+#define LOADER_MAGIC_THREAD_VALUE 0xDEADBEEF
+
+LoaderStatus loader_start(Loader* loader, const char* id, const char* args, FuriString* error_message) {
+    LoaderMessage message;
+    LoaderMessageLoaderStatusResult result;
+
+    message.type = LoaderMessageTypeStartByName;
+    message.start.id = id;
+    message.start.args = args;
+    message.start.error_message = error_message;
+    message.api_lock = api_lock_alloc_locked();
+    message.status_value = &result;
+    furi_message_queue_put(loader->queue, &message, FuriWaitForever);
+    api_lock_wait_unlock_and_free(message.api_lock);
+    return result.value;
+}
+
+bool loader_lock(Loader* loader) {
+    LoaderMessage message;
+    LoaderMessageBoolResult result;
+    message.type = LoaderMessageTypeLock;
+    message.api_lock = api_lock_alloc_locked();
+    message.bool_value = &result;
+    furi_message_queue_put(loader->queue, &message, FuriWaitForever);
+    api_lock_wait_unlock_and_free(message.api_lock);
+    return result.value;
+}
+
+void loader_unlock(Loader* loader) {
+    LoaderMessage message;
+    message.type = LoaderMessageTypeUnlock;
+    furi_message_queue_put(loader->queue, &message, FuriWaitForever);
+}
+
+bool loader_is_locked(Loader* loader) {
+    LoaderMessage message;
+    LoaderMessageBoolResult result;
+    message.type = LoaderMessageTypeIsLocked;
+    message.api_lock = api_lock_alloc_locked();
+    message.bool_value = &result;
+    furi_message_queue_put(loader->queue, &message, FuriWaitForever);
+    api_lock_wait_unlock_and_free(message.api_lock);
+    return result.value;
+}
+
+FuriPubSub* loader_get_pubsub(Loader* loader) {
+    furi_assert(loader);
+    // it's safe to return pubsub without locking
+    // because it's never freed and loader is never exited
+    // also the loader instance cannot be obtained until the pubsub is created
+    return loader->pubsub;
+}
+
+// callbacks
+
+static void loader_thread_state_callback(FuriThreadState thread_state, void* context) {
+    furi_assert(context);
+
+    Loader* loader = context;
+
+    if (thread_state == FuriThreadStateRunning) {
+        LoaderEvent event;
+        event.type = LoaderEventTypeApplicationStarted;
+        furi_pubsub_publish(loader->pubsub, &event);
+    } else if (thread_state == FuriThreadStateStopped) {
+        LoaderMessage message;
+        message.type = LoaderMessageTypeAppClosed;
+        furi_message_queue_put(loader->queue, &message, FuriWaitForever);
+    }
+}
+
+// implementation
+
+static Loader* loader_alloc() {
+    Loader* loader = malloc(sizeof(Loader));
+    loader->pubsub = furi_pubsub_alloc();
+    loader->queue = furi_message_queue_alloc(1, sizeof(LoaderMessage));
+    loader->app_data.args = NULL;
+    loader->app_data.thread = NULL;
+    loader->app_data.app = NULL;
+    return loader;
+}
+
+static void loader_start_app_thread(Loader* loader) {
+    // setup thread state callbacks
+    furi_thread_set_state_context(loader->app_data.thread, loader);
+    furi_thread_set_state_callback(loader->app_data.thread, loader_thread_state_callback);
+
+    // start app thread
+    furi_thread_start(loader->app_data.thread);
+}
+
+static void loader_log_status_error(
+    LoaderStatus status,
+    FuriString* error_message,
+    const char* format,
+    va_list args
+) {
+    if (error_message) {
+        furi_string_vprintf(error_message, format, args);
+        FURI_LOG_E(TAG, "Status [%d]: %s", status, furi_string_get_cstr(error_message));
+    } else {
+        FURI_LOG_E(TAG, "Status [%d]", status);
+    }
+}
+
+static LoaderStatus loader_make_status_error(
+    LoaderStatus status,
+    FuriString* error_message,
+    const char* format,
+    ...
+) {
+    va_list args;
+    va_start(args, format);
+    loader_log_status_error(status, error_message, format, args);
+    va_end(args);
+    return status;
+}
+
+static LoaderStatus loader_make_success_status(FuriString* error_message) {
+    if (error_message) {
+        furi_string_set(error_message, "App started");
+    }
+
+    return LoaderStatusOk;
+}
+
+static void loader_start_app(
+    Loader* loader,
+    const AppManifest* _Nonnull manifest,
+    const char* args
+) {
+    FURI_LOG_I(TAG, "Starting %s", manifest->id);
+
+    App* _Nonnull app = furi_app_alloc(manifest);
+    loader->app_data.app = app;
+
+    FuriThread* thread = furi_app_alloc_thread(loader->app_data.app, args);
+    loader->app_data.app->thread = thread;
+    loader->app_data.thread = thread;
+
+    loader_start_app_thread(loader);
+}
+
+// process messages
+
+static bool loader_do_is_locked(Loader* loader) {
+    return loader->app_data.thread != NULL;
+}
+
+static LoaderStatus loader_do_start_by_id(
+    Loader* loader,
+    const char* id,
+    const char* args,
+    FuriString* error_message
+) {
+    // check lock
+    if (loader_do_is_locked(loader)) {
+        const char* current_thread_name =
+            furi_thread_get_name(furi_thread_get_id(loader->app_data.thread));
+        return loader_make_status_error(
+            LoaderStatusErrorAppStarted,
+            error_message,
+            "Loader is locked, please close the \"%s\" first",
+            current_thread_name
+        );
+    }
+
+    const AppManifest* manifest = app_manifest_registry_find_by_id(id);
+    if (manifest == NULL) {
+        return loader_make_status_error(
+            LoaderStatusErrorUnknownApp,
+            error_message,
+            "Application \"%s\" not found",
+            id
+        );
+    }
+
+    loader_start_app(loader, manifest, args);
+    return loader_make_success_status(error_message);
+}
+
+static bool loader_do_lock(Loader* loader) {
+    if (loader->app_data.thread) {
+        return false;
+    }
+
+    loader->app_data.thread = (FuriThread*)LOADER_MAGIC_THREAD_VALUE;
+    return true;
+}
+
+static void loader_do_unlock(Loader* loader) {
+    furi_check(loader->app_data.thread == (FuriThread*)LOADER_MAGIC_THREAD_VALUE);
+    loader->app_data.thread = NULL;
+}
+
+static void loader_do_app_closed(Loader* loader) {
+    furi_assert(loader->app_data.thread);
+
+    furi_thread_join(loader->app_data.thread);
+    FURI_LOG_I(
+        TAG,
+        "App %s returned: %li",
+        loader->app_data.app->manifest->id,
+        furi_thread_get_return_code(loader->app_data.thread)
+    );
+
+    if (loader->app_data.args) {
+        free(loader->app_data.args);
+        loader->app_data.args = NULL;
+    }
+
+    if (loader->app_data.app) {
+        furi_app_free(loader->app_data.app);
+        loader->app_data.app = NULL;
+    } else {
+        assert(loader->app_data.thread == NULL);
+        furi_thread_free(loader->app_data.thread);
+    }
+
+    loader->app_data.thread = NULL;
+
+    FURI_LOG_I(
+        TAG,
+        "Application stopped. Free heap: %zu",
+        heap_caps_get_free_size(MALLOC_CAP_DEFAULT)
+    );
+
+    LoaderEvent event;
+    event.type = LoaderEventTypeApplicationStopped;
+    furi_pubsub_publish(loader->pubsub, &event);
+}
+
+// app
+
+_Noreturn int32_t loader_main(void* p) {
+    UNUSED(p);
+
+    Loader* loader = loader_alloc();
+    furi_record_create(RECORD_LOADER, loader);
+
+    LoaderMessage message;
+    while (true) {
+        if (furi_message_queue_get(loader->queue, &message, FuriWaitForever) == FuriStatusOk) {
+            switch (message.type) {
+                case LoaderMessageTypeStartByName:
+                    message.status_value->value = loader_do_start_by_id(
+                        loader,
+                        message.start.id,
+                        message.start.args,
+                        message.start.error_message
+                    );
+                    api_lock_unlock(message.api_lock);
+                    break;
+                case LoaderMessageTypeIsLocked:
+                    message.bool_value->value = loader_do_is_locked(loader);
+                    api_lock_unlock(message.api_lock);
+                    break;
+                case LoaderMessageTypeAppClosed:
+                    loader_do_app_closed(loader);
+                    break;
+                case LoaderMessageTypeLock:
+                    message.bool_value->value = loader_do_lock(loader);
+                    api_lock_unlock(message.api_lock);
+                    break;
+                case LoaderMessageTypeUnlock:
+                    loader_do_unlock(loader);
+                    break;
+            }
+        }
+    }
+}
+
+const AppManifest loader_app = {
+    .id = "loader",
+    .name = "Loader",
+    .icon = NULL,
+    .type = AppTypeService,
+    .entry_point = &loader_main,
+    .stack_size = AppStackSizeNormal
+};

components/nanobake/src/apps/services/loader/loader.h

@@ -0,0 +1,84 @@
+#pragma once
+#include "furi_core.h"
+#include "furi_string.h"
+#include "pubsub.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define RECORD_LOADER "loader"
+
+typedef struct Loader Loader;
+
+typedef enum {
+    LoaderStatusOk,
+    LoaderStatusErrorAppStarted,
+    LoaderStatusErrorUnknownApp,
+    LoaderStatusErrorInternal,
+} LoaderStatus;
+
+typedef enum {
+    LoaderEventTypeApplicationStarted,
+    LoaderEventTypeApplicationStopped
+} LoaderEventType;
+
+typedef struct {
+    LoaderEventType type;
+} LoaderEvent;
+
+/**
+ * @brief Start application
+ * @param[in] instance loader instance
+ * @param[in] id application name or id
+ * @param[in] args application arguments
+ * @param[out] error_message detailed error message, can be NULL
+ * @return LoaderStatus
+ */
+LoaderStatus loader_start(Loader* instance, const char* id, const char* args, FuriString* error_message);
+
+/**
+ * @brief Start application with GUI error message
+ * @param[in] instance loader instance
+ * @param[in] name application name or id
+ * @param[in] args application arguments
+ * @return LoaderStatus
+ */
+//LoaderStatus loader_start_with_gui_error(Loader* loader, const char* name, const char* args);
+
+/**
+ * @brief Lock application start
+ * @param[in] instance loader instance
+ * @return true on success
+ */
+bool loader_lock(Loader* instance);
+
+/**
+ * @brief Unlock application start
+ * @param[in] instance loader instance
+ */
+void loader_unlock(Loader* instance);
+
+/**
+ * @brief Check if loader is locked
+ * @param[in] instance loader instance
+ * @return true if locked
+ */
+bool loader_is_locked(Loader* instance);
+
+/**
+ * @brief Show loader menu
+ * @param[in] instance loader instance
+ */
+void loader_show_menu(Loader* instance);
+
+/**
+ * @brief Get loader pubsub
+ * @param[in] instance loader instance
+ * @return FuriPubSub*
+ */
+FuriPubSub* loader_get_pubsub(Loader* instance);
+
+#ifdef __cplusplus
+}
+#endif

components/nanobake/src/apps/services/loader/loader_i.h

@@ -0,0 +1,55 @@
+#pragma once
+#include "api_lock.h"
+#include "app_manifest.h"
+#include "loader.h"
+#include "message_queue.h"
+#include "pubsub.h"
+#include "thread.h"
+
+typedef struct {
+    char* args;
+    FuriThread* thread;
+    App* app;
+} LoaderAppData;
+
+struct Loader {
+    FuriPubSub* pubsub;
+    FuriMessageQueue* queue;
+    LoaderAppData app_data;
+};
+
+typedef enum {
+    LoaderMessageTypeStartByName,
+    LoaderMessageTypeAppClosed,
+    LoaderMessageTypeLock,
+    LoaderMessageTypeUnlock,
+    LoaderMessageTypeIsLocked,
+} LoaderMessageType;
+
+typedef struct {
+    const char* id;
+    const char* args;
+    FuriString* error_message;
+} LoaderMessageStartById;
+
+typedef struct {
+    LoaderStatus value;
+} LoaderMessageLoaderStatusResult;
+
+typedef struct {
+    bool value;
+} LoaderMessageBoolResult;
+
+typedef struct {
+    FuriApiLock api_lock;
+    LoaderMessageType type;
+
+    union {
+        LoaderMessageStartById start;
+    };
+
+    union {
+        LoaderMessageLoaderStatusResult* status_value;
+        LoaderMessageBoolResult* bool_value;
+    };
+} LoaderMessage;

components/nanobake/src/apps/system/system_info/system_info.c

@@ -0,0 +1,24 @@
+#include "system_info.h"
+#include "furi_extra_defines.h"
+#include "thread.h"
+
+static int32_t system_info_entry_point(void* param) {
+    UNUSED(param);
+
+    printf(
+        "Heap memory available: %d / %d\n",
+        heap_caps_get_free_size(MALLOC_CAP_DEFAULT),
+        heap_caps_get_total_size(MALLOC_CAP_DEFAULT)
+    );
+
+    return 0;
+}
+
+AppManifest system_info_app = {
+    .id = "systeminfo",
+    .name = "System Info",
+    .icon = NULL,
+    .type = AppTypeSystem,
+    .entry_point = &system_info_entry_point,
+    .stack_size = AppStackSizeNormal
+};

components/nanobake/src/apps/system/system_info/system_info.h

@@ -1,12 +1,12 @@
 #pragma once
 
-#include "app.h"
+#include "app_manifest.h"
 
 #ifdef __cplusplus
 extern "C" {
 #endif
 
-extern App system_info_app;
+extern AppManifest system_info_app;
 
 #ifdef __cplusplus
 }

components/nanobake/src/devices.c

@@ -9,7 +9,7 @@ Devices nb_devices_create(Config _Nonnull* config) {
     furi_check(config->display_driver != NULL, "no display driver configured");
     DisplayDriver display_driver = config->display_driver();
     ESP_LOGI(TAG, "display with driver %s", display_driver.name);
-    DisplayDevice* display = nb_display_alloc(&display_driver);
+    DisplayDevice* display = nb_display_device_alloc(&display_driver);
 
     TouchDevice* touch = NULL;
     if (config->touch_driver != NULL) {

components/nanobake/src/display.c

@@ -1,10 +1,10 @@
 #include "check.h"
 #include "display.h"
 
-DisplayDevice _Nonnull* nb_display_alloc(DisplayDriver _Nonnull* driver) {
+DisplayDevice _Nonnull* nb_display_device_alloc(DisplayDriver _Nonnull* driver) {
     DisplayDevice _Nonnull* display = malloc(sizeof(DisplayDevice));
     memset(display, 0, sizeof(DisplayDevice));
-    furi_check(driver->create_display(display), "failed to create display");
+    furi_check(driver->create_display_device(display), "failed to create display");
     furi_check(display->io_handle != NULL);
     furi_check(display->display_handle != NULL);
     furi_check(display->horizontal_resolution != 0);

components/nanobake/src/display.h

@@ -16,20 +16,21 @@ typedef struct {
     bool mirror_x;
     bool mirror_y;
     bool swap_xy;
+    bool monochrome;
 } DisplayDevice;
 
 typedef bool (*CreateDisplay)(DisplayDevice* display);
 
 typedef struct {
     char name[32];
-    CreateDisplay create_display;
+    CreateDisplay create_display_device;
 } DisplayDriver;
 
 /**
  * @param[in] driver
  * @return allocated display object
  */
-DisplayDevice _Nonnull* nb_display_alloc(DisplayDriver _Nonnull* driver);
+DisplayDevice _Nonnull* nb_display_device_alloc(DisplayDriver _Nonnull* driver);
 
 #ifdef __cplusplus
 }

components/nanobake/src/graphics.c

@@ -25,7 +25,7 @@ Lvgl nb_graphics_init(Devices _Nonnull* hardware) {
         .double_buffer = 0,
         .hres = display->horizontal_resolution,
         .vres = display->vertical_resolution,
-        .monochrome = false,
+        .monochrome = display->monochrome,
         .rotation = {
             .swap_xy = display->swap_xy,
             .mirror_x = display->mirror_x,
@@ -37,6 +37,8 @@ Lvgl nb_graphics_init(Devices _Nonnull* hardware) {
     };
 
     lv_disp_t _Nonnull* disp = lvgl_port_add_disp(&disp_cfg);
+    furi_check(disp != NULL, "failed to add display");
+
     lv_indev_t _Nullable* touch_indev = NULL;
 
     // Add touch

components/nanobake/src/nanobake.c

@@ -1,86 +1,61 @@
 #include "nanobake.h"
 #include "app_i.h"
-#include "applications/applications_i.h"
+#include "app_manifest_registry.h"
 #include "devices_i.h"
-#include "esp_log.h"
+#include "furi.h"
 #include "graphics_i.h"
-#include "m-list.h"
-// Furi
-#include "kernel.h"
-#include "record.h"
-#include "thread.h"
-
-M_LIST_DEF(thread_ids, FuriThreadId);
 
 #define TAG "nanobake"
 
-thread_ids_t prv_thread_ids;
+// System services
+extern const AppManifest desktop_app;
+extern const AppManifest gui_app;
+extern const AppManifest loader_app;
 
-static void prv_furi_init() {
-    // TODO: can we remove the suspend-resume logic?
-    if (xTaskGetSchedulerState() == taskSCHEDULER_RUNNING) {
-        vTaskSuspendAll();
-    }
-
-    furi_record_init();
-
-    xTaskResumeAll();
-}
-
-FuriThreadId nanobake_get_app_thread_id(size_t index) {
-    return *thread_ids_get(prv_thread_ids, index);
-}
-
-size_t nanobake_get_app_thread_count() {
-    return thread_ids_size(prv_thread_ids);
-}
-
-static void prv_start_app(const App _Nonnull* app) {
-    ESP_LOGI(TAG, "Starting %s app \"%s\"", nb_app_type_to_string(app->type), app->name);
+// System apps
+extern const AppManifest system_info_app;
 
+void start_service(const AppManifest* _Nonnull manifest) {
+    // TODO: keep track of running services
+    FURI_LOG_I(TAG, "Starting service %s", manifest->name);
     FuriThread* thread = furi_thread_alloc_ex(
-        app->name,
-        app->stack_size,
-        app->entry_point,
+        manifest->name,
+        manifest->stack_size,
+        manifest->entry_point,
         NULL
     );
-
-    if (app->type == SERVICE) {
-        furi_thread_mark_as_service(thread);
-    }
-
-    furi_thread_set_appid(thread, app->id);
-    furi_thread_set_priority(thread, app->priority);
+    furi_thread_mark_as_service(thread);
+    furi_thread_set_appid(thread, manifest->id);
     furi_thread_start(thread);
-
-    FuriThreadId thread_id = furi_thread_get_id(thread);
-    thread_ids_push_back(prv_thread_ids, thread_id);
 }
 
-__attribute__((unused)) extern void nanobake_start(Config _Nonnull* config) {
-    prv_furi_init();
+static void register_apps(Config* _Nonnull config) {
+    FURI_LOG_I(TAG, "Registering core apps");
+    app_manifest_registry_add(&desktop_app);
+    app_manifest_registry_add(&gui_app);
+    app_manifest_registry_add(&loader_app);
+    app_manifest_registry_add(&system_info_app);
+
+    FURI_LOG_I(TAG, "Registering user apps");
+    for (size_t i = 0; i < config->apps_count; i++) {
+        app_manifest_registry_add(config->apps[i]);
+    }
+}
+
+static void start_services() {
+    FURI_LOG_I(TAG, "Starting services");
+    app_manifest_registry_for_each_of_type(AppTypeService, start_service);
+    FURI_LOG_I(TAG, "Startup complete");
+}
+
+__attribute__((unused)) extern void nanobake_start(Config* _Nonnull config) {
+    furi_init();
 
     Devices hardware = nb_devices_create(config);
     /*NbLvgl lvgl =*/nb_graphics_init(&hardware);
 
-    thread_ids_init(prv_thread_ids);
+    register_apps(config);
 
-    ESP_LOGI(TAG, "Starting apps");
-
-    // Services
-    for (size_t i = 0; i < NANOBAKE_SERVICES_COUNT; i++) {
-        prv_start_app(NANOBAKE_SERVICES[i]);
-    }
-
-    // System
-    for (size_t i = 0; i < NANOBAKE_SYSTEM_APPS_COUNT; i++) {
-        prv_start_app(NANOBAKE_SYSTEM_APPS[i]);
-    }
-
-    // User
-    for (size_t i = 0; i < config->apps_count; i++) {
-        prv_start_app(config->apps[i]);
-    }
-
-    ESP_LOGI(TAG, "Startup complete");
+    start_services();
+    // TODO: option to await starting services?
 }

components/nanobake/src/nanobake.h

@@ -1,9 +1,8 @@
 #pragma once
 
-#include "app.h"
+#include "app_manifest.h"
 #include "devices.h"
-#include "core_defines.h"
-#include "base.h"
+#include "furi_extra_defines.h"
 
 #ifdef __cplusplus
 extern "C" {
@@ -21,7 +20,7 @@ typedef struct {
     const CreateTouchDriver _Nullable touch_driver;
     // List of user applications
     const size_t apps_count;
-    const App* const apps[];
+    const AppManifest* const apps[];
 } Config;
 
 __attribute__((unused)) extern void nanobake_start(Config _Nonnull* config);

components/nanobake/src/touch.c

@@ -3,7 +3,7 @@
 
 TouchDevice _Nonnull* nb_touch_alloc(TouchDriver _Nonnull* driver) {
     TouchDevice _Nonnull* touch = malloc(sizeof(TouchDevice));
-    bool success = driver->create_touch(
+    bool success = driver->create_touch_device(
         &(touch->io_handle),
         &(touch->touch_handle)
     );

components/nanobake/src/touch.h

@@ -11,7 +11,7 @@ typedef bool (*CreateTouch)(esp_lcd_panel_io_handle_t* io_handle, esp_lcd_touch_
 
 typedef struct {
     char name[32];
-    CreateTouch create_touch;
+    CreateTouch create_touch_device;
 } TouchDriver;
 
 typedef struct {