1 files changed, 94 insertions, 0 deletions
diff --git a/src/core/hle/service/am/applets/applets.h b/src/core/hle/service/am/applets/applets.h
new file mode 100644
index 000000000..136445649
--- /dev/null
+++ b/src/core/hle/service/am/applets/applets.h
@@ -0,0 +1,94 @@
+// Copyright 2018 yuzu emulator team
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <functional>
+#include <memory>
+#include <queue>
+#include "common/swap.h"
+#include "core/hle/kernel/event.h"
+
+union ResultCode;
+
+namespace Service::AM {
+
+class IStorage;
+
+namespace Applets {
+
+class AppletDataBroker final {
+public:
+    AppletDataBroker();
+    ~AppletDataBroker();
+
+    std::unique_ptr<IStorage> PopNormalDataToGame();
+    std::unique_ptr<IStorage> PopNormalDataToApplet();
+
+    std::unique_ptr<IStorage> PopInteractiveDataToGame();
+    std::unique_ptr<IStorage> PopInteractiveDataToApplet();
+
+    void PushNormalDataFromGame(IStorage storage);
+    void PushNormalDataFromApplet(IStorage storage);
+
+    void PushInteractiveDataFromGame(IStorage storage);
+    void PushInteractiveDataFromApplet(IStorage storage);
+
+    void SignalStateChanged() const;
+
+    Kernel::SharedPtr<Kernel::Event> GetNormalDataEvent() const;
+    Kernel::SharedPtr<Kernel::Event> GetInteractiveDataEvent() const;
+    Kernel::SharedPtr<Kernel::Event> GetStateChangedEvent() const;
+
+private:
+    // Queues are named from applet's perspective
+    std::queue<std::unique_ptr<IStorage>>
+        in_channel; // PopNormalDataToApplet and PushNormalDataFromGame
+    std::queue<std::unique_ptr<IStorage>>
+        out_channel; // PopNormalDataToGame and PushNormalDataFromApplet
+    std::queue<std::unique_ptr<IStorage>>
+        in_interactive_channel; // PopInteractiveDataToApplet and PushInteractiveDataFromGame
+    std::queue<std::unique_ptr<IStorage>>
+        out_interactive_channel; // PopInteractiveDataToGame and PushInteractiveDataFromApplet
+
+    Kernel::SharedPtr<Kernel::Event> state_changed_event;
+    Kernel::SharedPtr<Kernel::Event> pop_out_data_event; // Signaled on PushNormalDataFromApplet
+    Kernel::SharedPtr<Kernel::Event>
+        pop_interactive_out_data_event; // Signaled on PushInteractiveDataFromApplet
+};
+
+class Applet {
+public:
+    Applet();
+    virtual ~Applet();
+
+    virtual void Initialize(std::shared_ptr<AppletDataBroker> broker);
+
+    virtual bool TransactionComplete() const = 0;
+    virtual ResultCode GetStatus() const = 0;
+    virtual void ExecuteInteractive() = 0;
+    virtual void Execute() = 0;
+
+    bool IsInitialized() const {
+        return initialized;
+    }
+
+protected:
+    struct CommonArguments {
+        u32_le arguments_version;
+        u32_le size;
+        u32_le library_version;
+        u32_le theme_color;
+        u8 play_startup_sound;
+        u64_le system_tick;
+    };
+    static_assert(sizeof(CommonArguments) == 0x20, "CommonArguments has incorrect size.");
+
+    CommonArguments common_args;
+    std::shared_ptr<AppletDataBroker> broker;
+    bool initialized = false;
+};
+
+} // namespace Applets
+} // namespace Service::AM