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godot/core/os/os.h
Ruslan Mustakov 3b88476130 Add a way to retrieve stack bottom of the main thread 
I'm working on Nim bindings and Nim GC needs to know the stack
boundaries to check whether certain pointers are located on the stack
or in the heap. This commit adds godot_get_stack_bottom procedure
to gdnative module which returns pointer to the stack bottom of the
main thread. Later on this may be improved to return stack bottom of
the current thread.
2017-07-25 10:53:31 +07:00

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/*************************************************************************/
/* os.h */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* http://www.godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2017 Godot Engine contributors (cf. AUTHORS.md) */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#ifndef OS_H
#define OS_H
#include "engine.h"
#include "image.h"
#include "list.h"
#include "os/main_loop.h"
#include "power.h"
#include "ustring.h"
#include "vector.h"
#include <stdarg.h>
/**
@author Juan Linietsky <reduzio@gmail.com>
*/
class OS {
static OS *singleton;
String _execpath;
List<String> _cmdline;
bool _keep_screen_on;
bool low_processor_usage_mode;
bool _verbose_stdout;
String _local_clipboard;
uint64_t _msec_splash;
bool _no_window;
int _exit_code;
int _orientation;
bool _allow_hidpi;
char *last_error;
void *_stack_bottom;
public:
enum RenderThreadMode {
RENDER_THREAD_UNSAFE,
RENDER_THREAD_SAFE,
RENDER_SEPARATE_THREAD
};
struct VideoMode {
int width, height;
bool fullscreen;
bool resizable;
bool borderless_window;
float get_aspect() const { return (float)width / (float)height; }
VideoMode(int p_width = 1024, int p_height = 600, bool p_fullscreen = false, bool p_resizable = true, bool p_borderless_window = false) {
width = p_width;
height = p_height;
fullscreen = p_fullscreen;
resizable = p_resizable;
borderless_window = p_borderless_window;
}
};
protected:
friend class Main;
RenderThreadMode _render_thread_mode;
// functions used by main to initialize/deintialize the OS
virtual int get_video_driver_count() const = 0;
virtual const char *get_video_driver_name(int p_driver) const = 0;
virtual VideoMode get_default_video_mode() const = 0;
virtual int get_audio_driver_count() const = 0;
virtual const char *get_audio_driver_name(int p_driver) const = 0;
virtual void initialize_core() = 0;
virtual void initialize(const VideoMode &p_desired, int p_video_driver, int p_audio_driver) = 0;
virtual void set_main_loop(MainLoop *p_main_loop) = 0;
virtual void delete_main_loop() = 0;
virtual void finalize() = 0;
virtual void finalize_core() = 0;
virtual void set_cmdline(const char *p_execpath, const List<String> &p_args);
void _ensure_data_dir();
virtual bool _check_internal_feature_support(const String &p_feature) = 0;
public:
typedef int64_t ProcessID;
static OS *get_singleton();
enum ErrorType {
ERR_ERROR,
ERR_WARNING,
ERR_SCRIPT,
ERR_SHADER
};
virtual void print_error(const char *p_function, const char *p_file, int p_line, const char *p_code, const char *p_rationale, ErrorType p_type = ERR_ERROR);
virtual void print(const char *p_format, ...);
virtual void printerr(const char *p_format, ...);
virtual void vprint(const char *p_format, va_list p_list, bool p_stderr = false) = 0;
virtual void alert(const String &p_alert, const String &p_title = "ALERT!") = 0;
virtual String get_stdin_string(bool p_block = true) = 0;
virtual void set_last_error(const char *p_error);
virtual const char *get_last_error() const;
virtual void clear_last_error();
enum MouseMode {
MOUSE_MODE_VISIBLE,
MOUSE_MODE_HIDDEN,
MOUSE_MODE_CAPTURED,
MOUSE_MODE_CONFINED
};
virtual void set_mouse_mode(MouseMode p_mode);
virtual MouseMode get_mouse_mode() const;
virtual void warp_mouse_pos(const Point2 &p_to) {}
virtual Point2 get_mouse_position() const = 0;
virtual int get_mouse_button_state() const = 0;
virtual void set_window_title(const String &p_title) = 0;
virtual void set_clipboard(const String &p_text);
virtual String get_clipboard() const;
virtual void set_video_mode(const VideoMode &p_video_mode, int p_screen = 0) = 0;
virtual VideoMode get_video_mode(int p_screen = 0) const = 0;
virtual void get_fullscreen_mode_list(List<VideoMode> *p_list, int p_screen = 0) const = 0;
virtual int get_screen_count() const { return 1; }
virtual int get_current_screen() const { return 0; }
virtual void set_current_screen(int p_screen) {}
virtual Point2 get_screen_position(int p_screen = 0) const { return Point2(); }
virtual Size2 get_screen_size(int p_screen = 0) const { return get_window_size(); }
virtual int get_screen_dpi(int p_screen = 0) const { return 72; }
virtual Point2 get_window_position() const { return Vector2(); }
virtual void set_window_position(const Point2 &p_position) {}
virtual Size2 get_window_size() const = 0;
virtual void set_window_size(const Size2 p_size) {}
virtual void set_window_fullscreen(bool p_enabled) {}
virtual bool is_window_fullscreen() const { return true; }
virtual void set_window_resizable(bool p_enabled) {}
virtual bool is_window_resizable() const { return false; }
virtual void set_window_minimized(bool p_enabled) {}
virtual bool is_window_minimized() const { return false; }
virtual void set_window_maximized(bool p_enabled) {}
virtual bool is_window_maximized() const { return true; }
virtual void request_attention() {}
virtual void set_borderless_window(int p_borderless) {}
virtual bool get_borderless_window() { return 0; }
virtual void set_ime_position(const Point2 &p_pos) {}
virtual Error open_dynamic_library(const String p_path, void *&p_library_handle) { return ERR_UNAVAILABLE; };
virtual Error close_dynamic_library(void *p_library_handle) { return ERR_UNAVAILABLE; };
virtual Error get_dynamic_library_symbol_handle(void *p_library_handle, const String p_name, void *&p_symbol_handle) { return ERR_UNAVAILABLE; };
virtual void set_keep_screen_on(bool p_enabled);
virtual bool is_keep_screen_on() const;
virtual void set_low_processor_usage_mode(bool p_enabled);
virtual bool is_in_low_processor_usage_mode() const;
virtual String get_installed_templates_path() const { return ""; }
virtual String get_executable_path() const;
virtual Error execute(const String &p_path, const List<String> &p_arguments, bool p_blocking, ProcessID *r_child_id = NULL, String *r_pipe = NULL, int *r_exitcode = NULL) = 0;
virtual Error kill(const ProcessID &p_pid) = 0;
virtual int get_process_ID() const;
virtual Error shell_open(String p_uri);
virtual Error set_cwd(const String &p_cwd);
virtual bool has_environment(const String &p_var) const = 0;
virtual String get_environment(const String &p_var) const = 0;
virtual String get_name() = 0;
virtual List<String> get_cmdline_args() const { return _cmdline; }
virtual String get_model_name() const;
virtual MainLoop *get_main_loop() const = 0;
virtual void yield();
enum Weekday {
DAY_SUNDAY,
DAY_MONDAY,
DAY_TUESDAY,
DAY_WEDNESDAY,
DAY_THURSDAY,
DAY_FRIDAY,
DAY_SATURDAY
};
enum Month {
/// Start at 1 to follow Windows SYSTEMTIME structure
/// https://msdn.microsoft.com/en-us/library/windows/desktop/ms724950(v=vs.85).aspx
MONTH_JANUARY = 1,
MONTH_FEBRUARY,
MONTH_MARCH,
MONTH_APRIL,
MONTH_MAY,
MONTH_JUNE,
MONTH_JULY,
MONTH_AUGUST,
MONTH_SEPTEMBER,
MONTH_OCTOBER,
MONTH_NOVEMBER,
MONTH_DECEMBER
};
struct Date {
int year;
Month month;
int day;
Weekday weekday;
bool dst;
};
struct Time {
int hour;
int min;
int sec;
};
struct TimeZoneInfo {
int bias;
String name;
};
virtual Date get_date(bool local = false) const = 0;
virtual Time get_time(bool local = false) const = 0;
virtual TimeZoneInfo get_time_zone_info() const = 0;
virtual uint64_t get_unix_time() const;
virtual uint64_t get_system_time_secs() const;
virtual void delay_usec(uint32_t p_usec) const = 0;
virtual uint64_t get_ticks_usec() const = 0;
uint32_t get_ticks_msec() const;
uint64_t get_splash_tick_msec() const;
virtual bool can_draw() const = 0;
bool is_stdout_verbose() const;
enum CursorShape {
CURSOR_ARROW,
CURSOR_IBEAM,
CURSOR_POINTING_HAND,
CURSOR_CROSS,
CURSOR_WAIT,
CURSOR_BUSY,
CURSOR_DRAG,
CURSOR_CAN_DROP,
CURSOR_FORBIDDEN,
CURSOR_VSIZE,
CURSOR_HSIZE,
CURSOR_BDIAGSIZE,
CURSOR_FDIAGSIZE,
CURSOR_MOVE,
CURSOR_VSPLIT,
CURSOR_HSPLIT,
CURSOR_HELP,
CURSOR_MAX
};
virtual bool has_virtual_keyboard() const;
virtual void show_virtual_keyboard(const String &p_existing_text, const Rect2 &p_screen_rect = Rect2());
virtual void hide_virtual_keyboard();
virtual void set_cursor_shape(CursorShape p_shape) = 0;
virtual bool get_swap_ok_cancel() { return false; }
virtual void dump_memory_to_file(const char *p_file);
virtual void dump_resources_to_file(const char *p_file);
virtual void print_resources_in_use(bool p_short = false);
virtual void print_all_resources(String p_to_file = "");
virtual int get_static_memory_usage() const;
virtual int get_static_memory_peak_usage() const;
virtual int get_dynamic_memory_usage() const;
virtual int get_free_static_memory() const;
RenderThreadMode get_render_thread_mode() const { return _render_thread_mode; }
virtual String get_locale() const;
String get_safe_application_name() const;
virtual String get_data_dir() const;
virtual String get_resource_dir() const;
enum SystemDir {
SYSTEM_DIR_DESKTOP,
SYSTEM_DIR_DCIM,
SYSTEM_DIR_DOCUMENTS,
SYSTEM_DIR_DOWNLOADS,
SYSTEM_DIR_MOVIES,
SYSTEM_DIR_MUSIC,
SYSTEM_DIR_PICTURES,
SYSTEM_DIR_RINGTONES,
};
virtual String get_system_dir(SystemDir p_dir) const;
virtual void set_no_window_mode(bool p_enable);
virtual bool is_no_window_mode_enabled() const;
virtual bool has_touchscreen_ui_hint() const;
enum ScreenOrientation {
SCREEN_LANDSCAPE,
SCREEN_PORTRAIT,
SCREEN_REVERSE_LANDSCAPE,
SCREEN_REVERSE_PORTRAIT,
SCREEN_SENSOR_LANDSCAPE,
SCREEN_SENSOR_PORTRAIT,
SCREEN_SENSOR,
};
virtual void set_screen_orientation(ScreenOrientation p_orientation);
ScreenOrientation get_screen_orientation() const;
virtual void enable_for_stealing_focus(ProcessID pid) {}
virtual void move_window_to_foreground() {}
virtual void debug_break();
virtual void release_rendering_thread();
virtual void make_rendering_thread();
virtual void swap_buffers();
virtual void set_icon(const Ref<Image> &p_icon);
virtual int get_exit_code() const;
virtual void set_exit_code(int p_code);
virtual int get_processor_count() const;
virtual String get_unique_ID() const;
virtual Error native_video_play(String p_path, float p_volume, String p_audio_track, String p_subtitle_track);
virtual bool native_video_is_playing() const;
virtual void native_video_pause();
virtual void native_video_unpause();
virtual void native_video_stop();
virtual bool can_use_threads() const;
virtual Error dialog_show(String p_title, String p_description, Vector<String> p_buttons, Object *p_obj, String p_callback);
virtual Error dialog_input_text(String p_title, String p_description, String p_partial, Object *p_obj, String p_callback);
enum LatinKeyboardVariant {
LATIN_KEYBOARD_QWERTY,
LATIN_KEYBOARD_QWERTZ,
LATIN_KEYBOARD_AZERTY,
LATIN_KEYBOARD_QZERTY,
LATIN_KEYBOARD_DVORAK,
LATIN_KEYBOARD_NEO,
};
virtual LatinKeyboardVariant get_latin_keyboard_variant() const;
virtual bool is_joy_known(int p_device);
virtual String get_joy_guid(int p_device) const;
enum EngineContext {
CONTEXT_EDITOR,
CONTEXT_PROJECTMAN,
};
virtual void set_context(int p_context);
virtual void set_use_vsync(bool p_enable);
virtual bool is_vsync_enabled() const;
virtual PowerState get_power_state();
virtual int get_power_seconds_left();
virtual int get_power_percent_left();
bool check_feature_support(const String &p_feature);
/**
* Returns the stack bottom of the main thread of the application.
* This may be of use when integrating languages with garbage collectors that
* need to check whether a pointer is on the stack.
*/
virtual void *get_stack_bottom() const;
bool is_hidpi_allowed() const { return _allow_hidpi; }
OS();
virtual ~OS();
};
VARIANT_ENUM_CAST(PowerState);
#endif
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