mirror of
https://github.com/libretro/RetroArch.git
synced 2026-11-07 08:36:02 -10:00
notaz
f724cc370f
* Makefile.ctr: enable gc-sections This frees ~160k of RAM without any downsides that I know of. It's not much, but helps pcsx_rearmed on old3ds where it barely fits in RAM. * remove some dupe logic Regardless if `save_state_in_background` is enabled or not, it does exactly the same so the check can be removed. * optimize RAM state load content_load_state_from_ram() doesn't need the backup copy, content_save_state() never touches the ram_buf. It seems the whole logic was copy-pasted from content_undo_load_state() without thinking. * avoid useless memory use and copying Just take the source pointer instead of making a copy and then freeing it. This is a big deal on slow platforms having to deal with large states, like psx on old3ds. * allow the core to disable the savestate undo feature The undo feature may amount to at least 4 simultaneous buffers: save undo, load undo, the current save/load buffer, temporary buffer. When emulating a system with relatively large states on a system with little RAM (like PSX on old3ds) that amounts to something like ~18MB of ~42MB available to the core. Under memory pressure the libctru variation in RetroArch tries to salvage some memory from the main stack and linear memory, but since those are variable, they start to overlap creating instability. The solution is to just disable the undo feature.
148 lines
4.7 KiB
C
148 lines
4.7 KiB
C
/* RetroArch - A frontend for libretro.
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* Copyright (C) 2010-2014 - Hans-Kristian Arntzen
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* Copyright (C) 2011-2017 - Daniel De Matteis
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* Copyright (C) 2016-2019 - Brad Parker
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*
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* RetroArch is free software: you can redistribute it and/or modify it under the terms
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* of the GNU General Public License as published by the Free Software Found-
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* ation, either version 3 of the License, or (at your option) any later version.
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*
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* RetroArch is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
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* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along with RetroArch.
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* If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef __RARCH_FILE_H
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#define __RARCH_FILE_H
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#include <stdio.h>
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#include <stdint.h>
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#include <stddef.h>
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#include <sys/types.h>
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#include <boolean.h>
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#include <retro_common_api.h>
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#include <retro_miscellaneous.h>
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#include "frontend/frontend_driver.h"
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RETRO_BEGIN_DECLS
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typedef struct content_ctx_info
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{
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char **argv; /* Argument variable list. */
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void *args; /* Arguments passed from callee */
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environment_get_t environ_get; /* Function passed for environment_get function */
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int argc; /* Argument count. */
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} content_ctx_info_t;
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/* Load a state from memory. */
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bool content_load_state_from_ram(void);
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/* Save a state to memory. */
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bool content_save_state_to_ram(void);
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/* Save a ram state from memory to disk. */
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bool content_ram_state_to_file(const char *path);
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/* Load a state from disk to memory. */
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bool content_load_state(const char* path, bool load_to_backup_buffer, bool autoload);
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/* Save a state from memory to disk. */
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bool content_save_state(const char *path, bool save_to_disk);
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/* Save an automatic savestate to disk. */
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bool content_auto_save_state(const char *path);
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/* Check a ram state write to disk. */
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bool content_ram_state_pending(void);
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/* Gets the number of bytes required to serialize the state. */
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size_t content_get_serialized_size(void);
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/* Gets the number of bytes required to serialize the state for rewind. */
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size_t content_get_serialized_size_rewind(void);
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/* Serializes the current state for rewinding. buffer must be at least content_get_serialized_size bytes */
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bool content_serialize_state_rewind(void* buffer, size_t buffer_size);
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/* Deserializes the current state. */
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bool content_deserialize_state(const void* serialized_data, size_t serialized_size);
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/* Waits for any in-progress save state tasks to finish */
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void content_wait_for_save_state_task(void);
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/* Waits for any in-progress load state tasks to finish */
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void content_wait_for_load_state_task(void);
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/* Copy a save state. */
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bool content_rename_state(const char *origin, const char *dest);
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/* Undoes the last load state operation that was done */
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bool content_undo_load_state(void);
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/* Restores the last savestate file which was overwritten */
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bool content_undo_save_state(void);
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uint8_t content_get_flags(void);
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void content_set_does_not_need_content(void);
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void content_unset_does_not_need_content(void);
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uint32_t content_get_crc(void);
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void content_deinit(void);
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/* Initializes and loads a content file for the currently
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* selected libretro core. */
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bool content_init(void);
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/* Resets the state and savefile backup buffers */
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void content_reset_savestate_backups(void);
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/* Checks if the buffers are empty, or undo feature is disabled */
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bool content_undo_load_buf_is_empty(void);
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bool content_undo_save_buf_is_empty(void);
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bool content_undo_save_disabled(void);
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/* Clears the pending subsystem rom buffer */
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bool content_is_subsystem_pending_load(void);
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/* Clears the pending subsystem rom buffer */
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void content_clear_subsystem(void);
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/* Set the current subsystem*/
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void content_set_subsystem(unsigned subsystem);
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/* Get the current subsystem*/
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int content_get_subsystem(void);
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/* Add a rom to the subsystem rom buffer */
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void content_add_subsystem(const char* path);
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/* Get the current subsystem rom id */
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unsigned content_get_subsystem_rom_id(void);
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/* Set environment variables before a subsystem load */
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void content_set_subsystem_info(void);
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/* Get the path to the last selected subsystem rom */
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char* content_get_subsystem_rom(unsigned index);
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/* Sets the subsystem by name */
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bool content_set_subsystem_by_name(const char* subsystem_name);
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/* Get the current subsystem "friendly name" */
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size_t content_get_subsystem_friendly_name(const char* subsystem_name, char *s, size_t len);
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/* Sets overrides which modify frontend handling of
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* specific content file types */
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bool content_file_override_set(const struct retro_system_content_info_override *overrides);
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RETRO_END_DECLS
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#endif
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