Update SDL2 to version 2.28.1.

libs/SDL2/include/SDL_joystick.h

@@ -1,6 +1,6 @@
 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2022 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages
@@ -44,6 +44,7 @@
 #include "SDL_stdinc.h"
 #include "SDL_error.h"
 #include "SDL_guid.h"
+#include "SDL_mutex.h"
 
 #include "begin_code.h"
 /* Set up for C function definitions, even when using C++ */
@@ -66,6 +67,9 @@ extern "C" {
 /**
  * The joystick structure used to identify an SDL joystick
  */
+#ifdef SDL_THREAD_SAFETY_ANALYSIS
+extern SDL_mutex *SDL_joystick_lock;
+#endif
 struct _SDL_Joystick;
 typedef struct _SDL_Joystick SDL_Joystick;
 
@@ -124,9 +128,14 @@ typedef enum
  * the API functions that take a joystick index will be valid, and joystick
  * and game controller events will not be delivered.
  *
+ * As of SDL 2.26.0, you can take the joystick lock around reinitializing the
+ * joystick subsystem, to prevent other threads from seeing joysticks in an
+ * uninitialized state. However, all open joysticks will be closed and SDL
+ * functions called with them will fail.
+ *
  * \since This function is available since SDL 2.0.7.
  */
-extern DECLSPEC void SDLCALL SDL_LockJoysticks(void);
+extern DECLSPEC void SDLCALL SDL_LockJoysticks(void) SDL_ACQUIRE(SDL_joystick_lock);
 
 
 /**
@@ -141,7 +150,7 @@ extern DECLSPEC void SDLCALL SDL_LockJoysticks(void);
  *
  * \since This function is available since SDL 2.0.7.
  */
-extern DECLSPEC void SDLCALL SDL_UnlockJoysticks(void);
+extern DECLSPEC void SDLCALL SDL_UnlockJoysticks(void) SDL_RELEASE(SDL_joystick_lock);
 
 /**
  * Count the number of joysticks attached to the system.
@@ -279,13 +288,12 @@ extern DECLSPEC SDL_JoystickType SDLCALL SDL_JoystickGetDeviceType(int device_in
 /**
  * Get the instance ID of a joystick.
  *
- * This can be called before any joysticks are opened. If the index is out of
- * range, this function will return -1.
+ * This can be called before any joysticks are opened.
  *
  * \param device_index the index of the joystick to query (the N'th joystick
  *                     on the system
  * \returns the instance id of the selected joystick. If called on an invalid
- *          index, this function returns zero
+ *          index, this function returns -1.
  *
  * \since This function is available since SDL 2.0.6.
  */
@@ -425,6 +433,10 @@ extern DECLSPEC SDL_bool SDLCALL SDL_JoystickIsVirtual(int device_index);
  * the following: SDL_PollEvent, SDL_PumpEvents, SDL_WaitEventTimeout,
  * SDL_WaitEvent.
  *
+ * Note that when sending trigger axes, you should scale the value to the full
+ * range of Sint16. For example, a trigger at rest would have the value of
+ * `SDL_JOYSTICK_AXIS_MIN`.
+ *
  * \param joystick the virtual joystick on which to set state.
  * \param axis the specific axis on the virtual joystick to set.
  * \param value the new value for the specified axis.
@@ -514,7 +526,8 @@ extern DECLSPEC int SDLCALL SDL_JoystickGetPlayerIndex(SDL_Joystick *joystick);
  * Set the player index of an opened joystick.
  *
  * \param joystick the SDL_Joystick obtained from SDL_JoystickOpen()
- * \param player_index the player index to set.
+ * \param player_index Player index to assign to this joystick, or -1 to clear
+ *                     the player index and turn off player LEDs.
  *
  * \since This function is available since SDL 2.0.12.
  */
@@ -642,6 +655,25 @@ extern DECLSPEC void SDLCALL SDL_JoystickGetGUIDString(SDL_JoystickGUID guid, ch
  */
 extern DECLSPEC SDL_JoystickGUID SDLCALL SDL_JoystickGetGUIDFromString(const char *pchGUID);
 
+/**
+ * Get the device information encoded in a SDL_JoystickGUID structure
+ *
+ * \param guid the SDL_JoystickGUID you wish to get info about
+ * \param vendor A pointer filled in with the device VID, or 0 if not
+ *               available
+ * \param product A pointer filled in with the device PID, or 0 if not
+ *                available
+ * \param version A pointer filled in with the device version, or 0 if not
+ *                available
+ * \param crc16 A pointer filled in with a CRC used to distinguish different
+ *              products with the same VID/PID, or 0 if not available
+ *
+ * \since This function is available since SDL 2.26.0.
+ *
+ * \sa SDL_JoystickGetDeviceGUID
+ */
+extern DECLSPEC void SDLCALL SDL_GetJoystickGUIDInfo(SDL_JoystickGUID guid, Uint16 *vendor, Uint16 *product, Uint16 *version, Uint16 *crc16);
+
 /**
  * Get the status of a specified joystick.
  *