Reactor.hh

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#ifndef REACTOR_HH
#define REACTOR_HH

#include "Observer.hh"
#include "EventListener.hh"
#include "string_view.hh"
#include <cassert>
#include <memory>
#include <mutex>
#include <string>
#include <vector>

namespace openmsx {

class RTScheduler;
class EventDistributor;
class CommandController;
class InfoCommand;
class GlobalCliComm;
class GlobalCommandController;
class GlobalSettings;
class CliComm;
class Interpreter;
class Display;
class Mixer;
class InputEventGenerator;
class DiskFactory;
class DiskManipulator;
class DiskChanger;
class FilePool;
class UserSettings;
class RomDatabase;
class TclCallbackMessages;
class MSXMotherBoard;
class Setting;
class CommandLineParser;
class AfterCommand;
class ExitCommand;
class MessageCommand;
class MachineCommand;
class TestMachineCommand;
class CreateMachineCommand;
class DeleteMachineCommand;
class ListMachinesCommand;
class ActivateMachineCommand;
class StoreMachineCommand;
class RestoreMachineCommand;
class AviRecorder;
class ConfigInfo;
class RealTimeInfo;
class SoftwareInfoTopic;
template <typename T> class EnumSetting;

extern int exitCode;

class Reactor final : private Observer<Setting>, private EventListener
{
public:
        Reactor();
        void init();
        ~Reactor();

        void run(CommandLineParser& parser);

        void enterMainLoop();

        RTScheduler& getRTScheduler() { return *rtScheduler; }
        EventDistributor& getEventDistributor() { return *eventDistributor; }
        GlobalCliComm& getGlobalCliComm() { return *globalCliComm; }
        GlobalCommandController& getGlobalCommandController() { return *globalCommandController; }
        InputEventGenerator& getInputEventGenerator() { return *inputEventGenerator; }
        Display& getDisplay() { assert(display); return *display; }
        Mixer& getMixer() { return *mixer; }
        DiskFactory& getDiskFactory() { return *diskFactory; }
        DiskManipulator& getDiskManipulator() { return *diskManipulator; }
        EnumSetting<int>& getMachineSetting() { return *machineSetting; }
        FilePool& getFilePool() { return *filePool; }

        RomDatabase& getSoftwareDatabase();

        void switchMachine(const std::string& machine);
        MSXMotherBoard* getMotherBoard() const;

        static std::vector<std::string> getHwConfigs(string_view type);

        void block();
        void unblock();

        // convenience methods
        GlobalSettings& getGlobalSettings() { return *globalSettings; }
        InfoCommand& getOpenMSXInfoCommand();
        CommandController& getCommandController();
        CliComm& getCliComm();
        Interpreter& getInterpreter();
        string_view getMachineID() const;

        using Board = std::unique_ptr<MSXMotherBoard>;
        Board createEmptyMotherBoard();
        void replaceBoard(MSXMotherBoard& oldBoard, Board newBoard); // for reverse

private:
        using Boards = std::vector<Board>;

        void createMachineSetting();
        void switchBoard(MSXMotherBoard* newBoard);
        void deleteBoard(MSXMotherBoard* board);
        MSXMotherBoard& getMachine(string_view machineID) const;
        std::vector<string_view> getMachineIDs() const;

        // Observer<Setting>
        void update(const Setting& setting) override;

        // EventListener
        int signalEvent(const std::shared_ptr<const Event>& event) override;

        void unpause();
        void pause();

        std::mutex mbMutex; // this should come first, because it's still used by
                            // the destructors of the unique_ptr below

        // note: order of unique_ptr's is important
        std::unique_ptr<RTScheduler> rtScheduler;
        std::unique_ptr<EventDistributor> eventDistributor;
        std::unique_ptr<GlobalCliComm> globalCliComm;
        std::unique_ptr<GlobalCommandController> globalCommandController;
        std::unique_ptr<GlobalSettings> globalSettings;
        std::unique_ptr<InputEventGenerator> inputEventGenerator;
        std::unique_ptr<Display> display;
        std::unique_ptr<Mixer> mixer;
        std::unique_ptr<DiskFactory> diskFactory;
        std::unique_ptr<DiskManipulator> diskManipulator;
        std::unique_ptr<DiskChanger> virtualDrive;
        std::unique_ptr<FilePool> filePool;

        std::unique_ptr<EnumSetting<int>> machineSetting;
        std::unique_ptr<UserSettings> userSettings;
        std::unique_ptr<RomDatabase> softwareDatabase;

        std::unique_ptr<AfterCommand> afterCommand;
        std::unique_ptr<ExitCommand> exitCommand;
        std::unique_ptr<MessageCommand> messageCommand;
        std::unique_ptr<MachineCommand> machineCommand;
        std::unique_ptr<TestMachineCommand> testMachineCommand;
        std::unique_ptr<CreateMachineCommand> createMachineCommand;
        std::unique_ptr<DeleteMachineCommand> deleteMachineCommand;
        std::unique_ptr<ListMachinesCommand> listMachinesCommand;
        std::unique_ptr<ActivateMachineCommand> activateMachineCommand;
        std::unique_ptr<StoreMachineCommand> storeMachineCommand;
        std::unique_ptr<RestoreMachineCommand> restoreMachineCommand;
        std::unique_ptr<AviRecorder> aviRecordCommand;
        std::unique_ptr<ConfigInfo> extensionInfo;
        std::unique_ptr<ConfigInfo> machineInfo;
        std::unique_ptr<RealTimeInfo> realTimeInfo;
        std::unique_ptr<SoftwareInfoTopic> softwareInfoTopic;
        std::unique_ptr<TclCallbackMessages> tclCallbackMessages;

        // Locking rules for activeBoard access:
        //  - main thread can always access activeBoard without taking a lock
        //  - changing activeBoard handle can only be done in the main thread
        //    and needs to take the mbMutex lock
        //  - non-main thread can only access activeBoard via specific
        //    member functions (atm only via enterMainLoop()), it needs to take
        //    the mbMutex lock
        Boards boards; // unordered
        Boards garbageBoards;
        MSXMotherBoard* activeBoard = nullptr; // either nullptr or a board inside 'boards'

        int blockedCounter = 0;
        bool paused = false;

        bool running = true;

        bool isInit = false; // has the init() method been run successfully

        friend class MachineCommand;
        friend class TestMachineCommand;
        friend class CreateMachineCommand;
        friend class DeleteMachineCommand;
        friend class ListMachinesCommand;
        friend class ActivateMachineCommand;
        friend class StoreMachineCommand;
        friend class RestoreMachineCommand;
};

} // namespace openmsx

#endif // REACTOR_HH