// license:BSD-3-Clause // copyright-holders:Aaron Giles /*************************************************************************** save.h Save state management functions. ***************************************************************************/ #pragma once #ifndef __EMU_H__ #error Dont include this file directly; include emu.h instead. #endif #ifndef __SAVE_H__ #define __SAVE_H__ //************************************************************************** // CONSTANTS //************************************************************************** enum save_error { STATERR_NONE, STATERR_ILLEGAL_REGISTRATIONS, STATERR_INVALID_HEADER, STATERR_READ_ERROR, STATERR_WRITE_ERROR }; //************************************************************************** // MACROS //************************************************************************** // callback delegate for presave/postload typedef delegate save_prepost_delegate; // use this to declare a given type is a simple, non-pointer type that can be // saved; in general, this is intended only to be used for specific enum types // defined by your device #define ALLOW_SAVE_TYPE(TYPE) \ template<> struct save_manager::type_checker { static const bool is_atom = true; static const bool is_pointer = false; } // use this as above, but also to declare that std::vector is safe as well #define ALLOW_SAVE_TYPE_AND_ARRAY(TYPE) \ ALLOW_SAVE_TYPE(TYPE); \ template<> inline void save_manager::save_item(device_t *device, const char *module, const char *tag, int index, std::vector &value, const char *name) { save_memory(device, module, tag, index, name, &value[0], sizeof(TYPE), value.size()); } //************************************************************************** // TYPE DEFINITIONS //************************************************************************** class state_entry { public: // construction/destruction state_entry(void *data, const char *name, device_t *device, const char *module, const char *tag, int index, uint8_t size, uint32_t count); // helpers void flip_data(); // state void * m_data; // pointer to the memory to save/restore std::string m_name; // full name device_t * m_device; // associated device, nullptr if none std::string m_module; // module name std::string m_tag; // tag name int m_index; // index uint8_t m_typesize; // size of the raw data type uint32_t m_typecount; // number of items uint32_t m_offset; // offset within the final structure }; class save_manager { // type_checker is a set of templates to identify valid save types template struct type_checker { static const bool is_atom = false; static const bool is_pointer = false; }; template struct type_checker<_ItemType*> { static const bool is_atom = false; static const bool is_pointer = true; }; public: // construction/destruction save_manager(running_machine &machine); // getters running_machine &machine() const { return m_machine; } int registration_count() const { return m_entry_list.size(); } bool registration_allowed() const { return m_reg_allowed; } // registration control void allow_registration(bool allowed = true); const char *indexed_item(int index, void *&base, uint32_t &valsize, uint32_t &valcount) const; // function registration void register_presave(save_prepost_delegate func); void register_postload(save_prepost_delegate func); // callback dispatching void dispatch_presave(); void dispatch_postload(); // generic memory registration void save_memory(device_t *device, const char *module, const char *tag, uint32_t index, const char *name, void *val, uint32_t valsize, uint32_t valcount = 1); // templatized wrapper for general objects template void save_item(device_t *device, const char *module, const char *tag, int index, _ItemType &value, const char *valname) { if (type_checker<_ItemType>::is_pointer) throw emu_fatalerror("Called save_item on a pointer with no count!"); if (!type_checker<_ItemType>::is_atom) throw emu_fatalerror("Called save_item on a non-fundamental type!"); save_memory(device, module, tag, index, valname, &value, sizeof(value)); } // templatized wrapper for 1-dimensional arrays template void save_item(device_t *device, const char *module, const char *tag, int index, _ItemType (&value)[N], const char *valname) { if (!type_checker<_ItemType>::is_atom) throw emu_fatalerror("Called save_item on a non-fundamental type!"); save_memory(device, module, tag, index, valname, &value[0], sizeof(value[0]), N); } // templatized wrapper for 2-dimensional arrays template void save_item(device_t *device, const char *module, const char *tag, int index, _ItemType (&value)[M][N], const char *valname) { if (!type_checker<_ItemType>::is_atom) throw emu_fatalerror("Called save_item on a non-fundamental type!"); save_memory(device, module, tag, index, valname, &value[0][0], sizeof(value[0][0]), M * N); } // templatized wrapper for pointers template void save_pointer(device_t *device, const char *module, const char *tag, int index, _ItemType *value, const char *valname, uint32_t count) { if (!type_checker<_ItemType>::is_atom) throw emu_fatalerror("Called save_item on a non-fundamental type!"); save_memory(device, module, tag, index, valname, value, sizeof(*value), count); } // global memory registration template void save_item(_ItemType &value, const char *valname, int index = 0) { save_item(nullptr, "global", nullptr, index, value, valname); } template void save_pointer(_ItemType *value, const char *valname, uint32_t count, int index = 0) { save_pointer(nullptr, "global", nullptr, index, value, valname, count); } // file processing static save_error check_file(running_machine &machine, emu_file &file, const char *gamename, void (CLIB_DECL *errormsg)(const char *fmt, ...)); save_error write_file(emu_file &file); save_error read_file(emu_file &file); private: // internal helpers uint32_t signature() const; void dump_registry() const; static save_error validate_header(const uint8_t *header, const char *gamename, uint32_t signature, void (CLIB_DECL *errormsg)(const char *fmt, ...), const char *error_prefix); // state callback item class state_callback { public: // construction/destruction state_callback(save_prepost_delegate callback); save_prepost_delegate m_func; // delegate }; // internal state running_machine & m_machine; // reference to our machine bool m_reg_allowed; // are registrations allowed? int m_illegal_regs; // number of illegal registrations std::vector> m_entry_list; // list of reigstered entries std::vector> m_presave_list; // list of pre-save functions std::vector> m_postload_list; // list of post-load functions }; // template specializations to enumerate the fundamental atomic types you are allowed to save ALLOW_SAVE_TYPE_AND_ARRAY(char) ALLOW_SAVE_TYPE (bool); // std::vector may be packed internally ALLOW_SAVE_TYPE_AND_ARRAY(int8_t) ALLOW_SAVE_TYPE_AND_ARRAY(uint8_t) ALLOW_SAVE_TYPE_AND_ARRAY(int16_t) ALLOW_SAVE_TYPE_AND_ARRAY(uint16_t) ALLOW_SAVE_TYPE_AND_ARRAY(int32_t) ALLOW_SAVE_TYPE_AND_ARRAY(uint32_t) ALLOW_SAVE_TYPE_AND_ARRAY(int64_t) ALLOW_SAVE_TYPE_AND_ARRAY(uint64_t) ALLOW_SAVE_TYPE_AND_ARRAY(PAIR) ALLOW_SAVE_TYPE_AND_ARRAY(PAIR64) ALLOW_SAVE_TYPE_AND_ARRAY(float) ALLOW_SAVE_TYPE_AND_ARRAY(double) ALLOW_SAVE_TYPE_AND_ARRAY(endianness_t) ALLOW_SAVE_TYPE_AND_ARRAY(rgb_t) //************************************************************************** // INLINE FUNCTIONS //************************************************************************** //------------------------------------------------- // save_item - specialized save_item for bitmaps //------------------------------------------------- template<> inline void save_manager::save_item(device_t *device, const char *module, const char *tag, int index, bitmap_ind8 &value, const char *name) { save_memory(device, module, tag, index, name, &value.pix(0), value.bpp() / 8, value.rowpixels() * value.height()); } template<> inline void save_manager::save_item(device_t *device, const char *module, const char *tag, int index, bitmap_ind16 &value, const char *name) { save_memory(device, module, tag, index, name, &value.pix(0), value.bpp() / 8, value.rowpixels() * value.height()); } template<> inline void save_manager::save_item(device_t *device, const char *module, const char *tag, int index, bitmap_ind32 &value, const char *name) { save_memory(device, module, tag, index, name, &value.pix(0), value.bpp() / 8, value.rowpixels() * value.height()); } template<> inline void save_manager::save_item(device_t *device, const char *module, const char *tag, int index, bitmap_rgb32 &value, const char *name) { save_memory(device, module, tag, index, name, &value.pix(0), value.bpp() / 8, value.rowpixels() * value.height()); } //------------------------------------------------- // save_item - specialized save_item for attotimes //------------------------------------------------- template<> inline void save_manager::save_item(device_t *device, const char *module, const char *tag, int index, attotime &value, const char *name) { std::string tempstr = std::string(name).append(".attoseconds"); save_memory(device, module, tag, index, tempstr.c_str(), &value.m_attoseconds, sizeof(value.m_attoseconds)); tempstr.assign(name).append(".seconds"); save_memory(device, module, tag, index, tempstr.c_str(), &value.m_seconds, sizeof(value.m_seconds)); } #endif /* __SAVE_H__ */