// license:BSD-3-Clause // copyright-holders:Aaron Giles /*************************************************************************** device.h Device interface functions. ***************************************************************************/ #pragma once #ifndef __EMU_H__ #error Dont include this file directly; include emu.h instead. #endif #ifndef MAME_EMU_DEVICE_H #define MAME_EMU_DEVICE_H #include #include #include #include #include #include #include //************************************************************************** // MACROS //************************************************************************** // macro for specifying a clock derived from an owning device #define DERIVED_CLOCK(num, den) (0xff000000 | ((num) << 12) | ((den) << 0)) //************************************************************************** // DEVICE CONFIGURATION MACROS //************************************************************************** // configure devices #define DECLARE_READ_LINE_MEMBER(name) int name() #define READ_LINE_MEMBER(name) int name() #define DECLARE_WRITE_LINE_MEMBER(name) void name(ATTR_UNUSED int state) #define WRITE_LINE_MEMBER(name) void name(ATTR_UNUSED int state) //************************************************************************** // GLOBAL VARIABLES //************************************************************************** // use this to refer to the owning device when providing a device tag static const char DEVICE_SELF[] = ""; // use this to refer to the owning device's owner when providing a device tag static const char DEVICE_SELF_OWNER[] = "^"; //************************************************************************** // TYPE DEFINITIONS //************************************************************************** namespace emu { namespace detail { class device_type_impl_base; template struct is_device_implementation { static constexpr bool value = std::is_base_of::value; }; template struct is_device_interface { static constexpr bool value = std::is_base_of::value && !is_device_implementation::value; }; struct device_feature { enum type : u32 { // Functionality-related PROTECTION = u32(1) << 0, TIMING = u32(1) << 1, // Graphics GRAPHICS = u32(1) << 2, PALETTE = u32(1) << 3, // Sound SOUND = u32(1) << 4, // Capture/Media Output CAPTURE = u32(1) << 5, CAMERA = u32(1) << 6, MICROPHONE = u32(1) << 7, // Controls/HID CONTROLS = u32(1) << 8, KEYBOARD = u32(1) << 9, MOUSE = u32(1) << 10, // Media Output MEDIA = u32(1) << 11, DISK = u32(1) << 12, PRINTER = u32(1) << 13, TAPE = u32(1) << 14, PUNCH = u32(1) << 15, DRUM = u32(1) << 16, ROM = u32(1) << 17, // Comms/Network COMMS = u32(1) << 18, LAN = u32(1) << 19, WAN = u32(1) << 20, NONE = u32(0), ALL = (u32(1) << 21) - 1U }; }; DECLARE_ENUM_BITWISE_OPERATORS(device_feature::type); class device_registrar { private: class const_iterator_helper; public: class const_iterator { public: typedef std::ptrdiff_t difference_type; typedef device_type_impl_base value_type; typedef device_type_impl_base *pointer; typedef device_type_impl_base &reference; typedef std::forward_iterator_tag iterator_category; const_iterator() = default; const_iterator(const_iterator const &) = default; const_iterator &operator=(const_iterator const &) = default; bool operator==(const_iterator const &that) const { return m_type == that.m_type; } bool operator!=(const_iterator const &that) const { return m_type != that.m_type; } reference operator*() const { assert(m_type); return *m_type; } pointer operator->() const { return m_type; } const_iterator &operator++(); const_iterator operator++(int) { const_iterator const result(*this); ++*this; return result; } private: friend class const_iterator_helper; pointer m_type = nullptr; }; // explicit constructor is required for const variable initialization constexpr device_registrar() { } const_iterator begin() const { return cbegin(); } const_iterator end() const { return cend(); } const_iterator cbegin() const; const_iterator cend() const; private: friend class device_type_impl_base; class const_iterator_helper : public const_iterator { public: const_iterator_helper(device_type_impl_base *type) { m_type = type; } }; static device_type_impl_base *register_device(device_type_impl_base &type); }; template struct device_tag_struct { typedef DeviceClass type; }; template struct driver_tag_struct { typedef DriverClass type; }; template auto device_tag_func() { return device_tag_struct{ }; }; template auto driver_tag_func() { return driver_tag_struct{ }; }; class device_type_impl_base { private: friend class device_registrar; typedef std::unique_ptr (*create_func)(device_type_impl_base const &type, machine_config const &mconfig, char const *tag, device_t *owner, u32 clock); device_type_impl_base(device_type_impl_base const &) = delete; device_type_impl_base(device_type_impl_base &&) = delete; device_type_impl_base &operator=(device_type_impl_base const &) = delete; device_type_impl_base &operator=(device_type_impl_base &&) = delete; template static std::unique_ptr create_device(device_type_impl_base const &type, machine_config const &mconfig, char const *tag, device_t *owner, u32 clock) { return make_unique_clear(mconfig, tag, owner, clock); } template static std::unique_ptr create_driver(device_type_impl_base const &type, machine_config const &mconfig, char const *tag, device_t *owner, u32 clock) { assert(!owner); assert(!clock); return make_unique_clear(mconfig, type, tag); } create_func const m_creator; std::type_info const &m_type; char const *const m_shortname; char const *const m_fullname; char const *const m_source; device_feature::type const m_unemulated_features; device_feature::type const m_imperfect_features; device_type_impl_base *m_next; public: using exposed_type = device_t; device_type_impl_base(std::nullptr_t) : m_creator(nullptr) , m_type(typeid(std::nullptr_t)) , m_shortname(nullptr) , m_fullname(nullptr) , m_source(nullptr) , m_unemulated_features(device_feature::NONE) , m_imperfect_features(device_feature::NONE) , m_next(nullptr) { } template device_type_impl_base(device_tag_struct (*)()) : m_creator(&create_device) , m_type(typeid(DeviceClass)) , m_shortname(ShortName) , m_fullname(FullName) , m_source(Source) , m_unemulated_features(DeviceClass::unemulated_features()) , m_imperfect_features(DeviceClass::imperfect_features()) , m_next(device_registrar::register_device(*this)) { } template device_type_impl_base(driver_tag_struct (*)()) : m_creator(&create_driver) , m_type(typeid(DriverClass)) , m_shortname(ShortName) , m_fullname(FullName) , m_source(Source) , m_unemulated_features(DriverClass::unemulated_features() | Unemulated) , m_imperfect_features((DriverClass::imperfect_features() & ~Unemulated) | Imperfect) , m_next(nullptr) { } std::type_info const &type() const { return m_type; } char const *shortname() const { return m_shortname; } char const *fullname() const { return m_fullname; } char const *source() const { return m_source; } device_feature::type unemulated_features() const { return m_unemulated_features; } device_feature::type imperfect_features() const { return m_imperfect_features; } std::unique_ptr create(machine_config const &mconfig, char const *tag, device_t *owner, u32 clock) const { return m_creator(*this, mconfig, tag, owner, clock); } explicit operator bool() const { return bool(m_creator); } bool operator==(device_type_impl_base const &that) const { return &that == this; } bool operator!=(device_type_impl_base const &that) const { return &that != this; } }; template class device_type_impl : public device_type_impl_base { public: using exposed_type = DeviceClass; using device_type_impl_base::device_type_impl_base; using device_type_impl_base::create; template std::unique_ptr create(machine_config &mconfig, char const *tag, device_t *owner, Params &&... args) const { return make_unique_clear(mconfig, tag, owner, std::forward(args)...); } template DeviceClass &operator()(machine_config &mconfig, char const *tag, Params &&... args) const; template DeviceClass &operator()(machine_config &mconfig, device_finder &finder, Params &&... args) const; template DeviceClass &operator()(machine_config_replace replace, char const *tag, Params &&... args) const; template DeviceClass &operator()(machine_config_replace replace, device_finder &finder, Params &&... args) const; }; inline device_registrar::const_iterator &device_registrar::const_iterator::operator++() { m_type = m_type->m_next; return *this; } } } // namespace emu::detail // device types typedef emu::detail::device_type_impl_base const &device_type; typedef std::add_pointer_t device_type_ptr; extern emu::detail::device_registrar const registered_device_types; template < typename DeviceClass, char const *ShortName, char const *FullName, char const *Source> constexpr auto device_creator = &emu::detail::device_tag_func; template < typename DriverClass, char const *ShortName, char const *FullName, char const *Source, emu::detail::device_feature::type Unemulated, emu::detail::device_feature::type Imperfect> constexpr auto driver_device_creator = &emu::detail::driver_tag_func; #define DECLARE_DEVICE_TYPE(Type, Class) \ class Class; \ extern emu::detail::device_type_impl const &Type; \ extern template class device_finder; \ extern template class device_finder; #define DECLARE_DEVICE_TYPE_NS(Type, Namespace, Class) \ extern emu::detail::device_type_impl const &Type; \ extern template class device_finder; \ extern template class device_finder; #define DEFINE_DEVICE_TYPE(Type, Class, ShortName, FullName) \ namespace { \ struct Class##_device_traits { static constexpr char const shortname[] = ShortName, fullname[] = FullName, source[] = __FILE__; }; \ constexpr char const Class##_device_traits::shortname[], Class##_device_traits::fullname[], Class##_device_traits::source[]; \ } \ emu::detail::device_type_impl const &Type = device_creator; \ template class device_finder; \ template class device_finder; #define DEFINE_DEVICE_TYPE_PRIVATE(Type, Base, Class, ShortName, FullName) \ namespace { \ struct Class##_device_traits { static constexpr char const shortname[] = ShortName, fullname[] = FullName, source[] = __FILE__; }; \ constexpr char const Class##_device_traits::shortname[], Class##_device_traits::fullname[], Class##_device_traits::source[]; \ } \ emu::detail::device_type_impl const &Type = device_creator; #define DEFINE_DEVICE_TYPE_NS(Type, Namespace, Class, ShortName, FullName) \ namespace { \ struct Class##_device_traits { static constexpr char const shortname[] = ShortName, fullname[] = FullName, source[] = __FILE__; }; \ constexpr char const Class##_device_traits::shortname[], Class##_device_traits::fullname[], Class##_device_traits::source[]; \ } \ emu::detail::device_type_impl const &Type = device_creator; \ template class device_finder; \ template class device_finder; // exception classes class device_missing_dependencies : public emu_exception { }; // timer IDs for devices typedef u32 device_timer_id; // ======================> device_t // device_t represents a device class device_t : public delegate_late_bind { DISABLE_COPYING(device_t); friend class simple_list; friend class running_machine; friend class finder_base; friend class devcb_base; class subdevice_list { friend class device_t; friend class machine_config; public: // construction/destruction subdevice_list() { } // getters device_t *first() const { return m_list.first(); } int count() const { return m_list.count(); } bool empty() const { return m_list.empty(); } // range iterators using auto_iterator = simple_list::auto_iterator; auto_iterator begin() const { return m_list.begin(); } auto_iterator end() const { return m_list.end(); } private: // private helpers device_t *find(const std::string &name) const { device_t *curdevice; for (curdevice = m_list.first(); curdevice != nullptr; curdevice = curdevice->next()) if (name.compare(curdevice->m_basetag) == 0) return curdevice; return nullptr; } // private state simple_list m_list; // list of sub-devices we own mutable std::unordered_map m_tagmap; // map of devices looked up and found by subtag }; class interface_list { friend class device_t; friend class device_interface; friend class device_memory_interface; friend class device_state_interface; friend class device_execute_interface; public: class auto_iterator { public: typedef std::ptrdiff_t difference_type; typedef device_interface value_type; typedef device_interface *pointer; typedef device_interface &reference; typedef std::forward_iterator_tag iterator_category; // construction/destruction auto_iterator(device_interface *intf) : m_current(intf) { } // required operator overloads bool operator==(const auto_iterator &iter) const { return m_current == iter.m_current; } bool operator!=(const auto_iterator &iter) const { return m_current != iter.m_current; } device_interface &operator*() const { return *m_current; } device_interface *operator->() const { return m_current; } auto_iterator &operator++(); auto_iterator operator++(int); private: // private state device_interface *m_current; }; // construction/destruction interface_list() : m_head(nullptr), m_execute(nullptr), m_memory(nullptr), m_state(nullptr) { } // getters device_interface *first() const { return m_head; } // range iterators auto_iterator begin() const { return auto_iterator(m_head); } auto_iterator end() const { return auto_iterator(nullptr); } private: device_interface *m_head; // head of interface list device_execute_interface *m_execute; // pre-cached pointer to execute interface device_memory_interface *m_memory; // pre-cached pointer to memory interface device_state_interface *m_state; // pre-cached pointer to state interface }; protected: // construction/destruction device_t( const machine_config &mconfig, device_type type, const char *tag, device_t *owner, u32 clock); public: // device flags using feature = emu::detail::device_feature; using feature_type = emu::detail::device_feature::type; /// \brief Report unemulated features /// /// Implement this member in a derived class to declare features /// that are not emulated. This will propagate to all other devices /// and systems that use the device. Unemulated features are shown /// in the system selection UI, and cause a red warning to be /// displayed on starting a system. /// \return Bitwise or of the feature constants for unemulated /// features of the device. /// \sa imperfect_features static constexpr feature_type unemulated_features() { return feature::NONE; } /// \brief Report imperfectly emulated features /// /// Implement this member in a derived class to declare features /// that are imperfectly emulated. This will propagate to all other /// devices and systems that use the device. Imperfectly emulated /// features are shown in the system selection UI, and cause a /// yellow warning to be displayed on starting a system (provided /// there are no unemulated features, which take precedence and /// cause the warning to be red). /// /// An exception is imperfectly emulated protection, which results /// in a red warning being displayed when starting a system. /// \return Bitwise or of the feature constants for imperfectly /// emulated features of the device. /// \sa unemulated_features static constexpr feature_type imperfect_features() { return feature::NONE; } virtual ~device_t(); // getters bool has_running_machine() const { return m_machine != nullptr; } running_machine &machine() const { /*assert(m_machine != nullptr);*/ return *m_machine; } const char *tag() const { return m_tag.c_str(); } const char *basetag() const { return m_basetag.c_str(); } device_type type() const { return m_type; } const char *name() const { return m_type.fullname(); } const char *shortname() const { return m_type.shortname(); } virtual std::vector searchpath() const; const char *source() const { return m_type.source(); } device_t *owner() const { return m_owner; } device_t *next() const { return m_next; } u32 configured_clock() const { return m_configured_clock; } const machine_config &mconfig() const { return m_machine_config; } const input_device_default *input_ports_defaults() const { return m_input_defaults; } const std::vector &rom_region_vector() const; const tiny_rom_entry *rom_region() const { return device_rom_region(); } ioport_constructor input_ports() const { return device_input_ports(); } std::string const &get_default_bios_tag() const { return m_default_bios_tag; } u8 default_bios() const { assert(configured()); return m_default_bios; } u8 system_bios() const { return m_system_bios; } // interface helpers interface_list &interfaces() { return m_interfaces; } const interface_list &interfaces() const { return m_interfaces; } template bool interface(DeviceClass *&intf) { intf = dynamic_cast(this); return (intf != nullptr); } template bool interface(DeviceClass *&intf) const { intf = dynamic_cast(this); return (intf != nullptr); } // specialized helpers for common core interfaces bool interface(device_execute_interface *&intf) { intf = m_interfaces.m_execute; return (intf != nullptr); } bool interface(device_execute_interface *&intf) const { intf = m_interfaces.m_execute; return (intf != nullptr); } bool interface(device_memory_interface *&intf) { intf = m_interfaces.m_memory; return (intf != nullptr); } bool interface(device_memory_interface *&intf) const { intf = m_interfaces.m_memory; return (intf != nullptr); } bool interface(device_state_interface *&intf) { intf = m_interfaces.m_state; return (intf != nullptr); } bool interface(device_state_interface *&intf) const { intf = m_interfaces.m_state; return (intf != nullptr); } device_execute_interface &execute() const { assert(m_interfaces.m_execute != nullptr); return *m_interfaces.m_execute; } device_memory_interface &memory() const { assert(m_interfaces.m_memory != nullptr); return *m_interfaces.m_memory; } device_state_interface &state() const { assert(m_interfaces.m_state != nullptr); return *m_interfaces.m_state; } // owned object helpers subdevice_list &subdevices() { return m_subdevices; } const subdevice_list &subdevices() const { return m_subdevices; } // device-relative tag lookups std::string subtag(std::string tag) const; std::string siblingtag(std::string tag) const { return (m_owner != nullptr) ? m_owner->subtag(tag) : tag; } memory_region *memregion(std::string tag) const; memory_share *memshare(std::string tag) const; memory_bank *membank(std::string tag) const; ioport_port *ioport(std::string tag) const; device_t *subdevice(const char *tag) const; device_t *siblingdevice(const char *tag) const; template DeviceClass *subdevice(const char *tag) const { return downcast(subdevice(tag)); } template DeviceClass *siblingdevice(const char *tag) const { return downcast(siblingdevice(tag)); } std::string parameter(const char *tag) const; // configuration helpers void add_machine_configuration(machine_config &config); void set_clock(u32 clock); void set_clock(const XTAL &xtal) { set_clock(xtal.value()); } void set_input_default(const input_device_default *config) { m_input_defaults = config; } template void set_default_bios_tag(Params &&... args) { assert(!configured()); m_default_bios_tag.assign(std::forward(args)...); } // state helpers void config_complete(); bool configured() const { return m_config_complete; } void validity_check(validity_checker &valid) const; bool started() const { return m_started; } void reset(); // clock/timing accessors u32 clock() const { return m_clock; } u32 unscaled_clock() const { return m_unscaled_clock; } void set_unscaled_clock(u32 clock); void set_unscaled_clock(const XTAL &xtal) { set_unscaled_clock(xtal.value()); } void set_unscaled_clock_int(u32 clock) { set_unscaled_clock(clock); } // non-overloaded name because binding to overloads is ugly double clock_scale() const { return m_clock_scale; } void set_clock_scale(double clockscale); attotime clocks_to_attotime(u64 clocks) const noexcept; u64 attotime_to_clocks(const attotime &duration) const noexcept; // timer interfaces emu_timer *timer_alloc(device_timer_id id = 0, void *ptr = nullptr); void timer_set(const attotime &duration, device_timer_id id = 0, int param = 0, void *ptr = nullptr); void synchronize(device_timer_id id = 0, int param = 0, void *ptr = nullptr) { timer_set(attotime::zero, id, param, ptr); } void timer_expired(emu_timer &timer, device_timer_id id, int param, void *ptr) { device_timer(timer, id, param, ptr); } // state saving interfaces template void ATTR_COLD save_item(ItemType &value, const char *valname, int index = 0) { assert(m_save); m_save->save_item(this, name(), tag(), index, value, valname); } template void ATTR_COLD save_item(ItemType &value, ElementType StructType::*element, const char *valname, int index = 0) { assert(m_save); m_save->save_item(this, name(), tag(), index, value, element, valname); } template void ATTR_COLD save_pointer(ItemType &&value, const char *valname, u32 count, int index = 0) { assert(m_save); m_save->save_pointer(this, name(), tag(), index, std::forward(value), valname, count); } template void ATTR_COLD save_pointer(ItemType &&value, ElementType StructType::*element, const char *valname, u32 count, int index = 0) { assert(m_save); m_save->save_pointer(this, name(), tag(), index, std::forward(value), element, valname, count); } // debugging device_debug *debug() const { return m_debug.get(); } void set_system_bios(u8 bios) { m_system_bios = bios; } bool findit(bool isvalidation) const; // misc template void popmessage(Format &&fmt, Params &&... args) const; template void logerror(Format &&fmt, Params &&... args) const; protected: // miscellaneous helpers void set_machine(running_machine &machine); void resolve_pre_map(); void resolve_post_map(); void start(); void stop(); void debug_setup(); void pre_save(); void post_load(); void notify_clock_changed(); finder_base *register_auto_finder(finder_base &autodev); void register_callback(devcb_base &callback); //------------------- begin derived class overrides // device-level overrides virtual const tiny_rom_entry *device_rom_region() const; virtual void device_add_mconfig(machine_config &config); virtual ioport_constructor device_input_ports() const; /// \brief Finalise device configuration /// /// Perform any final configuration tasks after all devices in the /// system have added machine configuration. This is called after /// any #device_interface mix-in interface_config_complete members /// have completed. /// /// Note that automatic object finders will not have been resolved /// at the time this member is called. virtual void device_config_complete(); /// \brief Additional device validity checks /// /// Implement this member to provide additional validity checks. /// Report errors using #osd_printf_error and report warnings using /// #osd_printf_warning. The system being validated, device type /// and device tag are collected automatically. Do not throw /// exceptions to report errors. /// /// This provides an opportunity to check that the device has been /// configured correctly. Systems are validated on start, and also /// when the user manually runs a validity check. Validity checks /// are only run for devices configured in runnable systems, not /// when checking that a device can be instantiated in isolation. /// \param [in] valid Reference to the validity checker object /// performing validation (provides some helper member functions). /// \sa device_interface::interface_validity_check virtual void device_validity_check(validity_checker &valid) const ATTR_COLD; /// \brief Resolve objects that may be needed while starting /// /// Implement this member to complete object resolution before any /// devices are started. For example it may be necessary to resolve /// callbacks before any devices start so initial input conditions /// can be set. This is called after all registerd automatic object /// finders are resolved. virtual void device_resolve_objects() ATTR_COLD; /// \brief Device start handler /// /// Implement this member to set up the initial state of the device /// on start. This will be called after all #device_interface // /mix-in interface_pre_start members have completed successfully. /// If the device can't start until another device has completed /// starting, throw a #device_missing_dependencies exception. /// Starting will be postponed until additional devices have been /// started. /// /// If a device's base class is not device_t, it's good practice to /// check start order dependencies (and throw /// #device_missing_dependencies if necessary) before calling the /// base implementation. This will ensure that the base /// implementation won't be called twice if starting needs to be /// postponed. /// /// This is the correct place to register for save states. /// \sa device_reset device_stop /// device_interface::interface_pre_start /// device_interface::interface_post_start virtual void device_start() ATTR_COLD = 0; /// \brief Device stop handler /// /// Implement this member to perform additional tasks on ending an /// emulation session. You may deallocate memory here. This is /// called after interface_pre_stop is called for all /// #device_interface mix-ins, and before interface_post_stop is /// called for any #device_interface mix-ins. /// \sa device_interface::interface_pre_stop /// device_interface::interface_post_stop virtual void device_stop() ATTR_COLD; /// \brief Device reset handler /// /// Implement this member to provide reset behaviour. This is /// called after all #device_interface mix-in interface_pre_reset /// members have completed, and before any child devices are reset. /// All devices are reset at the beginning of an emulation session /// (after all devices have been started), and also when the user /// requests a soft reset (by pressing F3 by default, and also /// available from the debugger). /// /// Note that child devices are reset automatically when a device is /// reset. You should not reset child devices manually from this /// member. If you need to provide additional behaviour after child /// devices are reset, implement #device_reset_after_children. /// /// Only implement warm reset behaviour in this member. Initial /// cold reset conditions should be set up in #device_start. /// \sa device_reset_after_children device_start /// device_interface::interface_pre_reset /// device_interface::interface_post_reset virtual void device_reset() ATTR_COLD; /// \brief Additional reset behaviour after child device reset /// /// Implement this member to provide additional reset behaviour /// after child devices are reset. This is called when resetting a /// device after #device_reset has been called and all child devices /// have been reset, and before any #device_interface mix-in /// interface_post_reset members are called. /// \sa device_reset device_interface::interface_pre_reset /// device_interface::interface_post_reset virtual void device_reset_after_children() ATTR_COLD; /// \brief Prepare for a save state to be written /// /// Implement this member to perform any tasks necessary before any /// registered save state items are recorded. For example it may be /// necessary to flush caches, serialise self-referencing members or /// pointers into data structures. This is called after all /// #device_interface mix-in interface_pre_save members are called. /// \sa device_post_load device_interface::interface_pre_save virtual void device_pre_save() ATTR_COLD; /// \brief Complete save state loading /// /// Implement this member to perform any tasks necessary after /// registered save state items are loaded. For example it may be /// necessary to update or invalidate caches, or de-serialise /// pointers into data structures. This is called after all /// #device_interface mix-in interface_post_load members are called. /// \sa device_pre_save device_interface::interface_post_load virtual void device_post_load() ATTR_COLD; virtual void device_clock_changed(); virtual void device_debug_setup(); virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr); //------------------- end derived class overrides // core device properties device_type m_type; // device type // device relationships & interfaces device_t * m_owner; // device that owns us device_t * m_next; // next device by the same owner (of any type/class) subdevice_list m_subdevices; // container for list of subdevices interface_list m_interfaces; // container for list of interfaces // device clocks u32 m_configured_clock; // originally configured device clock u32 m_unscaled_clock; // current unscaled device clock u32 m_clock; // current device clock, after scaling double m_clock_scale; // clock scale factor attoseconds_t m_attoseconds_per_clock;// period in attoseconds std::unique_ptr m_debug; const machine_config & m_machine_config; // reference to the machine's configuration const input_device_default *m_input_defaults; // devices input ports default overrides u8 m_system_bios; // the system BIOS we wish to load u8 m_default_bios; // the default system BIOS std::string m_default_bios_tag; // tag of the default system BIOS private: // internal helpers device_t *subdevice_slow(const char *tag) const; void calculate_derived_clock(); // private state; accessor use required running_machine * m_machine; save_manager * m_save; std::string m_tag; // full tag for this instance std::string m_basetag; // base part of the tag bool m_config_complete; // have we completed our configuration? bool m_started; // true if the start function has succeeded finder_base * m_auto_finder_list; // list of objects to auto-find mutable std::vector m_rom_entries; std::list m_callbacks; // string formatting buffer for logerror mutable util::ovectorstream m_string_buffer; }; /// \brief Device mix-in base /// /// Provides a base for #device_t mix-ins that integrate with the device /// lifecycle. Derived classes are used to implement a number of /// standard concepts and interfaces, and integrate with the scheduler, /// debugger and user interface. class device_interface { DISABLE_COPYING(device_interface); protected: // construction/destruction device_interface(device_t &device, const char *type); virtual ~device_interface(); public: const char *interface_type() const { return m_type; } // casting helpers device_t &device() { return m_device; } const device_t &device() const { return m_device; } operator device_t &() { return m_device; } // iteration helpers device_interface *interface_next() const { return m_interface_next; } // optional operation overrides /// \brief Finalise mix-in configuration /// /// Perform any final configuration tasks after all devices in the /// system have added machine configuration. This is called before /// device_config_complete is called for the device. /// /// Note that automatic object finders will not have been resolved /// at this time. /// \sa device_t::device_config_complete virtual void interface_config_complete(); /// \brief Additional mix-in validity checks /// /// Implement this member to provide additional validity checks. /// Report errors using #osd_printf_error and report warnings using /// #osd_printf_warning. The system being validated, device type /// and device tag are collected automatically. Do not throw /// exceptions to report errors. /// /// This provides an opportunity to check that the mix-in has been /// configured correctly. Systems are validated on start, and also /// when the user manually runs a validity check. Validity checks /// are only run for devices configured in runnable systems, not /// when checking that a device can be instantiated in isolation. /// \param [in] valid Reference to the validity checker object /// performing validation (provides some helper member functions). /// \sa device_t::device_validity_check virtual void interface_validity_check(validity_checker &valid) const ATTR_COLD; /// \brief Mix-in start handler /// /// Implement this member to set up the initial state of the mix-in /// on start. This is called before the device_start member is /// called for the device. If the mix-in can't be started until /// another device has started, throw a #device_missing_dependencies /// exception. Starting will be postponed until additional devices /// have been started. /// /// Note that this member may be called multiple times if another /// device_interface mix-in throws a #device_missing_dependencies /// exception from its interface_pre_start member, or if the device /// throws a #device_missing_dependencies exception from its /// device_start member. You must check to ensure that operations /// like resource allocation are not performed multiple times, or /// postpone them until #interface_post_start is called. /// /// It's simpler to register for save states when /// #interface_post_start is called. /// \sa interface_post_start device_t::device_start virtual void interface_pre_start() ATTR_COLD; /// \brief Mix-in start completion handler /// /// Implement this member to complete mix-in start-up. This is /// called after #interface_pre_start is called for all /// device_interface mix-ins, and after device_start is called for /// the device. This member will only be called once, it will not /// be called multiple times if device starting is postponed. /// /// This member must not throw #device_missing_dependencies (start /// order dependencies should be checked in #interface_pre_start). /// This is the appropriate place to allocate resources like /// timers and register for save states. /// \sa interface_pre_start device_t::device_start virtual void interface_post_start() ATTR_COLD; /// \brief Mix-in reset handler /// /// Implement this member to provide reset behaviour. This is /// called before device_reset is called for the device, and before /// any child devices are reset. Only implement warm reset /// behaviour in this member. Initial cold reset conditions should /// be set up in #interface_pre_start and/or #interface_post_start. /// If you need to provide additional behaviour after child devices /// are reset, implement #interface_post_reset. /// \sa interface_post_reset device_t::device_reset virtual void interface_pre_reset() ATTR_COLD; /// \brief Mix-in reset completion handler /// /// Implement this member to provide additional reset behaviour /// after child devices are reset. This is called after /// device_reset_after_children has been called for the device. /// \sa interface_pre_reset device_t::device_reset /// device_t::device_reset_after_children virtual void interface_post_reset() ATTR_COLD; /// \brief Mix-in stop handler /// /// Implement this member to perform additional tasks on ending an /// emulation session. Do not deallocate anything that may need to /// be referenced from another device_interface mix-in's /// interface_pre_stop member or from the device's device_stop /// member. This is called before device_stop is called for the /// device. /// \sa interface_post_stop device_t::device_stop virtual void interface_pre_stop() ATTR_COLD; /// \brief Mix-in stop completion handler /// /// Implement this member to perform additional tasks on ending an /// emulation session after the device is stopped. You can /// deallocate memory here. This is called after device_stop is /// called for the device. /// \sa interface_pre_stop device_t::device_stop virtual void interface_post_stop() ATTR_COLD; /// \brief Prepare for a save state to be written /// /// Implement this member to perform any tasks necessary before any /// registered save state items are recorded. For example it may be /// necessary to flush caches, serialise self-referencing members or /// pointers into data structures. This is called before /// device_pre_save is called for the device. /// \sa interface_post_load device_t::device_pre_save virtual void interface_pre_save() ATTR_COLD; /// \brief Complete save state loading /// /// Implement this member to perform any tasks necessary after /// registered save state items are loaded. For example it may be /// necessary to update or invalidate caches, or de-serialise /// pointers into data structures. This is called before /// device_post_load is called for the device. /// \sa interface_pre_save device_t::device_post_load virtual void interface_post_load() ATTR_COLD; virtual void interface_clock_changed(); virtual void interface_debug_setup(); private: // internal state device_interface * m_interface_next; device_t & m_device; const char * m_type; }; // ======================> device_iterator // helper class to iterate over the hierarchy of devices depth-first class device_iterator { public: class auto_iterator { public: typedef std::ptrdiff_t difference_type; typedef device_t value_type; typedef device_t *pointer; typedef device_t &reference; typedef std::forward_iterator_tag iterator_category; // construction auto_iterator(device_t *devptr, int curdepth, int maxdepth) : m_curdevice(devptr) , m_curdepth(curdepth) , m_maxdepth(maxdepth) { } // getters device_t *current() const { return m_curdevice; } int depth() const { return m_curdepth; } // required operator overrides bool operator==(auto_iterator const &iter) const { return m_curdevice == iter.m_curdevice; } bool operator!=(auto_iterator const &iter) const { return m_curdevice != iter.m_curdevice; } device_t &operator*() const { assert(m_curdevice); return *m_curdevice; } device_t *operator->() const { return m_curdevice; } auto_iterator &operator++() { advance(); return *this; } auto_iterator operator++(int) { auto_iterator const result(*this); ++*this; return result; } protected: // search depth-first for the next device void advance() { // remember our starting position, and end immediately if we're nullptr if (m_curdevice) { device_t *start = m_curdevice; // search down first if (m_curdepth < m_maxdepth) { m_curdevice = start->subdevices().first(); if (m_curdevice) { m_curdepth++; return; } } // search next for neighbors up the ownership chain while (m_curdepth > 0 && start) { // found a neighbor? great! m_curdevice = start->next(); if (m_curdevice) return; // no? try our parent start = start->owner(); m_curdepth--; } // returned to the top; we're done m_curdevice = nullptr; } } // protected state device_t * m_curdevice; int m_curdepth; const int m_maxdepth; }; // construction device_iterator(device_t &root, int maxdepth = 255) : m_root(root), m_maxdepth(maxdepth) { } // standard iterators auto_iterator begin() const { return auto_iterator(&m_root, 0, m_maxdepth); } auto_iterator end() const { return auto_iterator(nullptr, 0, m_maxdepth); } // return first item device_t *first() const { return begin().current(); } // return the number of items available int count() const { int result = 0; for (device_t &item : *this) { (void)&item; result++; } return result; } // return the index of a given item in the virtual list int indexof(device_t &device) const { int index = 0; for (device_t &item : *this) { if (&item == &device) return index; else index++; } return -1; } // return the indexed item in the list device_t *byindex(int index) const { for (device_t &item : *this) if (index-- == 0) return &item; return nullptr; } private: // internal state device_t & m_root; int m_maxdepth; }; // ======================> device_type_iterator // helper class to find devices of a given type in the device hierarchy template class device_type_iterator { public: class auto_iterator : protected device_iterator::auto_iterator { public: using device_iterator::auto_iterator::difference_type; using device_iterator::auto_iterator::iterator_category; using device_iterator::auto_iterator::depth; typedef DeviceClass value_type; typedef DeviceClass *pointer; typedef DeviceClass &reference; // construction auto_iterator(device_t *devptr, int curdepth, int maxdepth) : device_iterator::auto_iterator(devptr, curdepth, maxdepth) { // make sure the first device is of the specified type while (m_curdevice && (m_curdevice->type().type() != typeid(DeviceType))) advance(); } // required operator overrides bool operator==(auto_iterator const &iter) const { return m_curdevice == iter.m_curdevice; } bool operator!=(auto_iterator const &iter) const { return m_curdevice != iter.m_curdevice; } // getters returning specified device type DeviceClass *current() const { return downcast(m_curdevice); } DeviceClass &operator*() const { assert(m_curdevice); return downcast(*m_curdevice); } DeviceClass *operator->() const { return downcast(m_curdevice); } // search for devices of the specified type auto_iterator &operator++() { advance(); while (m_curdevice && (m_curdevice->type().type() != typeid(DeviceType))) advance(); return *this; } auto_iterator operator++(int) { auto_iterator const result(*this); ++*this; return result; } }; // construction device_type_iterator(device_t &root, int maxdepth = 255) : m_root(root), m_maxdepth(maxdepth) { } // standard iterators auto_iterator begin() const { return auto_iterator(&m_root, 0, m_maxdepth); } auto_iterator end() const { return auto_iterator(nullptr, 0, m_maxdepth); } auto_iterator cbegin() const { return auto_iterator(&m_root, 0, m_maxdepth); } auto_iterator cend() const { return auto_iterator(nullptr, 0, m_maxdepth); } // return first item DeviceClass *first() const { return begin().current(); } // return the number of items available int count() const { return std::distance(cbegin(), cend()); } // return the index of a given item in the virtual list int indexof(DeviceClass &device) const { int index = 0; for (DeviceClass &item : *this) { if (&item == &device) return index; else index++; } return -1; } // return the indexed item in the list DeviceClass *byindex(int index) const { for (DeviceClass &item : *this) if (index-- == 0) return &item; return nullptr; } private: // internal state device_t & m_root; int m_maxdepth; }; // ======================> device_interface_iterator // helper class to find devices with a given interface in the device hierarchy // also works for finding devices derived from a given subclass template class device_interface_iterator { public: class auto_iterator : public device_iterator::auto_iterator { public: // construction auto_iterator(device_t *devptr, int curdepth, int maxdepth) : device_iterator::auto_iterator(devptr, curdepth, maxdepth) { // set the iterator for the first device with the interface find_interface(); } // getters returning specified interface type InterfaceClass *current() const { return m_interface; } InterfaceClass &operator*() const { assert(m_interface != nullptr); return *m_interface; } // search for devices with the specified interface const auto_iterator &operator++() { advance(); find_interface(); return *this; } private: // private helper void find_interface() { // advance until finding a device with the interface for ( ; m_curdevice != nullptr; advance()) if (m_curdevice->interface(m_interface)) return; // if we run out of devices, make sure the interface pointer is null m_interface = nullptr; } // private state InterfaceClass *m_interface; }; public: // construction device_interface_iterator(device_t &root, int maxdepth = 255) : m_root(root), m_maxdepth(maxdepth) { } // standard iterators auto_iterator begin() const { return auto_iterator(&m_root, 0, m_maxdepth); } auto_iterator end() const { return auto_iterator(nullptr, 0, m_maxdepth); } // return first item InterfaceClass *first() const { return begin().current(); } // return the number of items available int count() const { int result = 0; for (InterfaceClass &item : *this) { (void)&item; result++; } return result; } // return the index of a given item in the virtual list int indexof(InterfaceClass &intrf) const { int index = 0; for (InterfaceClass &item : *this) { if (&item == &intrf) return index; else index++; } return -1; } // return the indexed item in the list InterfaceClass *byindex(int index) const { for (InterfaceClass &item : *this) if (index-- == 0) return &item; return nullptr; } private: // internal state device_t & m_root; int m_maxdepth; }; //************************************************************************** // INLINE FUNCTIONS //************************************************************************** //------------------------------------------------- // subdevice - given a tag, find the device by // name relative to this device //------------------------------------------------- inline device_t *device_t::subdevice(const char *tag) const { // empty string or nullptr means this device if (tag == nullptr || *tag == 0) return const_cast(this); // do a quick lookup and return that if possible auto quick = m_subdevices.m_tagmap.find(tag); return (quick != m_subdevices.m_tagmap.end()) ? quick->second : subdevice_slow(tag); } //------------------------------------------------- // siblingdevice - given a tag, find the device // by name relative to this device's parent //------------------------------------------------- inline device_t *device_t::siblingdevice(const char *tag) const { // empty string or nullptr means this device if (tag == nullptr || *tag == 0) return const_cast(this); // leading caret implies the owner, just skip it if (tag[0] == '^') tag++; // query relative to the parent, if we have one if (m_owner != nullptr) return m_owner->subdevice(tag); // otherwise, it's nullptr unless the tag is absolute return (tag[0] == ':') ? subdevice(tag) : nullptr; } // these operators requires device_interface to be a complete type inline device_t::interface_list::auto_iterator &device_t::interface_list::auto_iterator::operator++() { m_current = m_current->interface_next(); return *this; } inline device_t::interface_list::auto_iterator device_t::interface_list::auto_iterator::operator++(int) { auto_iterator result(*this); m_current = m_current->interface_next(); return result; } #endif /* MAME_EMU_DEVICE_H */