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RetroArch/runloop.h

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/* RetroArch - A frontend for libretro.
* Copyright (C) 2010-2014 - Hans-Kristian Arntzen
* Copyright (C) 2011-2021 - Daniel De Matteis
*
* RetroArch is free software: you can redistribute it and/or modify it under the terms
* of the GNU General Public License as published by the Free Software Found-
* ation, either version 3 of the License, or (at your option) any later version.
*
* RetroArch is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
* PURPOSE. See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along with RetroArch.
* If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef __RUNLOOP_H
#define __RUNLOOP_H
#include <stdint.h>
#include <stddef.h>
#include <stdlib.h>
#include <boolean.h>
#include <retro_inline.h>
#include <retro_common_api.h>
#include <libretro.h>
#include <dynamic/dylib.h>
#include <queues/message_queue.h>
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#ifdef HAVE_THREADS
#include <rthreads/rthreads.h>
#endif
#include "dynamic.h"
#include "core_option_manager.h"
#include "performance_counters.h"
#include "state_manager.h"
/* Arbitrary twenty subsystems limit */
#define SUBSYSTEM_MAX_SUBSYSTEMS 20
/* Arbitrary 10 roms for each subsystem limit */
#define SUBSYSTEM_MAX_SUBSYSTEM_ROMS 10
#ifdef HAVE_THREADS
#define RUNLOOP_MSG_QUEUE_LOCK(runloop_st) slock_lock((runloop_st)->msg_queue_lock)
#define RUNLOOP_MSG_QUEUE_UNLOCK(runloop_st) slock_unlock((runloop_st)->msg_queue_lock)
#else
#define RUNLOOP_MSG_QUEUE_LOCK(runloop_st) (void)(runloop_st)
#define RUNLOOP_MSG_QUEUE_UNLOCK(runloop_st) (void)(runloop_st)
#endif
enum runloop_state_enum
{
RUNLOOP_STATE_ITERATE = 0,
RUNLOOP_STATE_POLLED_AND_SLEEP,
RUNLOOP_STATE_MENU_ITERATE,
RUNLOOP_STATE_END,
RUNLOOP_STATE_QUIT
};
enum poll_type_override_t
{
POLL_TYPE_OVERRIDE_DONTCARE = 0,
POLL_TYPE_OVERRIDE_EARLY,
POLL_TYPE_OVERRIDE_NORMAL,
POLL_TYPE_OVERRIDE_LATE
};
typedef struct runloop_ctx_msg_info
{
const char *msg;
unsigned prio;
unsigned duration;
bool flush;
} runloop_ctx_msg_info_t;
/* Contains the current retro_fastforwarding_override
* parameters along with any pending updates triggered
* by RETRO_ENVIRONMENT_SET_FASTFORWARDING_OVERRIDE */
typedef struct fastmotion_overrides
{
struct retro_fastforwarding_override current;
struct retro_fastforwarding_override next;
bool pending;
} fastmotion_overrides_t;
typedef struct
{
unsigned priority;
float duration;
char str[128];
bool set;
} runloop_core_status_msg_t;
/* Contains all callbacks associated with
* core options.
* > At present there is only a single
* callback, 'update_display' - but we
* may wish to add more in the future
* (e.g. for directly informing a core of
* core option value changes, or getting/
* setting extended/non-standard option
* value data types) */
typedef struct core_options_callbacks
{
retro_core_options_update_display_callback_t update_display;
} core_options_callbacks_t;
#ifdef HAVE_RUNAHEAD
typedef bool(*runahead_load_state_function)(const void*, size_t);
typedef void *(*constructor_t)(void);
typedef void (*destructor_t )(void*);
typedef struct my_list_t
{
void **data;
constructor_t constructor;
destructor_t destructor;
int capacity;
int size;
} my_list;
#endif
struct runloop
{
#if defined(HAVE_CG) || defined(HAVE_GLSL) || defined(HAVE_SLANG) || defined(HAVE_HLSL)
rarch_timer_t shader_delay_timer; /* int64_t alignment */
#endif
retro_time_t core_runtime_last;
retro_time_t core_runtime_usec;
retro_time_t frame_limit_minimum_time;
retro_time_t frame_limit_last_time;
retro_usec_t frame_time_last; /* int64_t alignment */
struct retro_core_t current_core; /* uint64_t alignment */
#if defined(HAVE_RUNAHEAD)
uint64_t runahead_last_frame_count; /* uint64_t alignment */
#if defined(HAVE_DYNAMIC) || defined(HAVE_DYLIB)
struct retro_core_t secondary_core; /* uint64_t alignment */
#endif
retro_ctx_load_content_info_t *load_content_info;
#if defined(HAVE_DYNAMIC) || defined(HAVE_DYLIB)
char *secondary_library_path;
#endif
my_list *runahead_save_state_list;
my_list *input_state_list;
#endif
#ifdef HAVE_REWIND
struct state_manager_rewind_state rewind_st;
#endif
struct retro_perf_counter *perf_counters_libretro[MAX_COUNTERS];
bool *load_no_content_hook;
struct string_list *subsystem_fullpaths;
struct retro_subsystem_info subsystem_data[SUBSYSTEM_MAX_SUBSYSTEMS];
struct retro_callbacks retro_ctx; /* ptr alignment */
msg_queue_t msg_queue; /* ptr alignment */
retro_input_state_t input_state_callback_original; /* ptr alignment */
#ifdef HAVE_RUNAHEAD
function_t retro_reset_callback_original; /* ptr alignment */
function_t original_retro_deinit; /* ptr alignment */
function_t original_retro_unload; /* ptr alignment */
runahead_load_state_function
retro_unserialize_callback_original; /* ptr alignment */
#if defined(HAVE_DYNAMIC) || defined(HAVE_DYLIB)
struct retro_callbacks secondary_callbacks; /* ptr alignment */
#endif
#endif
#ifdef HAVE_THREADS
slock_t *msg_queue_lock;
#endif
content_state_t content_st; /* ptr alignment */
struct retro_subsystem_rom_info
subsystem_data_roms[SUBSYSTEM_MAX_SUBSYSTEMS]
[SUBSYSTEM_MAX_SUBSYSTEM_ROMS]; /* ptr alignment */
core_option_manager_t *core_options;
core_options_callbacks_t core_options_callback;/* ptr alignment */
retro_keyboard_event_t key_event; /* ptr alignment */
retro_keyboard_event_t frontend_key_event; /* ptr alignment */
rarch_system_info_t system; /* ptr alignment */
struct retro_frame_time_callback frame_time; /* ptr alignment */
struct retro_audio_buffer_status_callback audio_buffer_status; /* ptr alignment */
#ifdef HAVE_DYNAMIC
dylib_t lib_handle; /* ptr alignment */
#endif
#if defined(HAVE_RUNAHEAD)
#if defined(HAVE_DYNAMIC) || defined(HAVE_DYLIB)
dylib_t secondary_lib_handle; /* ptr alignment */
#endif
size_t runahead_save_state_size;
#endif
size_t msg_queue_size;
#if defined(HAVE_RUNAHEAD)
#if defined(HAVE_DYNAMIC) || defined(HAVE_DYLIB)
int port_map[MAX_USERS];
#endif
#endif
runloop_core_status_msg_t core_status_msg;
unsigned pending_windowed_scale;
unsigned max_frames;
unsigned audio_latency;
unsigned fastforward_after_frames;
unsigned perf_ptr_libretro;
unsigned subsystem_current_count;
fastmotion_overrides_t fastmotion_override; /* float alignment */
retro_bits_t has_set_libretro_device; /* uint32_t alignment */
enum rarch_core_type current_core_type;
enum rarch_core_type explicit_current_core_type;
enum poll_type_override_t core_poll_type_override;
#if defined(HAVE_RUNAHEAD)
enum rarch_core_type last_core_type;
#endif
char runtime_content_path_basename[8192];
char current_library_name[256];
char current_library_version[256];
char current_valid_extensions[256];
char subsystem_path[256];
#ifdef HAVE_SCREENSHOTS
char max_frames_screenshot_path[PATH_MAX_LENGTH];
#endif
#if defined(HAVE_CG) || defined(HAVE_GLSL) || defined(HAVE_SLANG) || defined(HAVE_HLSL)
char runtime_shader_preset_path[PATH_MAX_LENGTH];
#endif
char runtime_content_path[PATH_MAX_LENGTH];
char runtime_core_path[PATH_MAX_LENGTH];
char savefile_dir[PATH_MAX_LENGTH];
char savestate_dir[PATH_MAX_LENGTH];
struct
{
char *remapfile;
char savefile[8192];
char savestate[8192];
char cheatfile[8192];
char ups[8192];
char bps[8192];
char ips[8192];
char label[8192];
} name;
bool is_inited;
bool missing_bios;
bool force_nonblock;
bool paused;
bool idle;
bool focused;
bool slowmotion;
bool fastmotion;
bool shutdown_initiated;
bool core_shutdown_initiated;
bool core_running;
bool perfcnt_enable;
bool game_options_active;
bool folder_options_active;
bool autosave;
#ifdef HAVE_CONFIGFILE
bool overrides_active;
#endif
bool remaps_core_active;
bool remaps_game_active;
bool remaps_content_dir_active;
#ifdef HAVE_SCREENSHOTS
bool max_frames_screenshot;
#endif
#ifdef HAVE_RUNAHEAD
bool has_variable_update;
bool input_is_dirty;
bool runahead_save_state_size_known;
bool request_fast_savestate;
bool runahead_available;
bool runahead_secondary_core_available;
bool runahead_force_input_dirty;
#endif
#ifdef HAVE_PATCH
bool patch_blocked;
#endif
bool is_sram_load_disabled;
bool is_sram_save_disabled;
bool use_sram;
bool ignore_environment_cb;
bool core_set_shared_context;
bool has_set_core;
};
typedef struct runloop runloop_state_t;
#ifdef HAVE_BSV_MOVIE
#define BSV_MOVIE_IS_EOF() || (input_st->bsv_movie_state.movie_end && \
input_st->bsv_movie_state.eof_exit)
#else
#define BSV_MOVIE_IS_EOF()
#endif
/* Time to exit out of the main loop?
* Reasons for exiting:
* a) Shutdown environment callback was invoked.
* b) Quit key was pressed.
* c) Frame count exceeds or equals maximum amount of frames to run.
* d) Video driver no longer alive.
* e) End of BSV movie and BSV EOF exit is true. (TODO/FIXME - explain better)
*/
#define RUNLOOP_TIME_TO_EXIT(quit_key_pressed) (runloop_state.shutdown_initiated || quit_key_pressed || !is_alive BSV_MOVIE_IS_EOF() || ((runloop_state.max_frames != 0) && (frame_count >= runloop_state.max_frames)) || runloop_exec)
RETRO_BEGIN_DECLS
void runloop_path_fill_names(void);
/**
* runloop_environment_cb:
* @cmd : Identifier of command.
* @data : Pointer to data.
*
* Environment callback function implementation.
*
* Returns: true (1) if environment callback command could
* be performed, otherwise false (0).
**/
bool runloop_environment_cb(unsigned cmd, void *data);
void runloop_msg_queue_push(const char *msg,
unsigned prio, unsigned duration,
bool flush,
char *title,
enum message_queue_icon icon,
enum message_queue_category category);
void runloop_set_current_core_type(
enum rarch_core_type type, bool explicitly_set);
/**
* runloop_iterate:
*
* Run Libretro core in RetroArch for one frame.
*
* Returns: 0 on successful run,
* Returns 1 if we have to wait until button input in order
* to wake up the loop.
* Returns -1 if we forcibly quit out of the
* RetroArch iteration loop.
**/
int runloop_iterate(void);
runloop_state_t *runloop_state_get_ptr(void);
RETRO_END_DECLS
#endif
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