Provided by: libsdl3-doc_3.2.20+ds-2_all 

NAME
SDL_GetJoystickPlayerIndex - Get the player index of an opened joystick.
SYNOPSIS
#include <SDL3/SDL_joystick.h>
int SDL_GetJoystickPlayerIndex(SDL_Joystick *joystick);
DESCRIPTION
For XInput controllers this returns the XInput user index. Many joysticks will not be able to supply this
information.
FUNCTION PARAMETERS
joystick
the SDL_Joystick obtained from SDL_OpenJoystick().
RETURN VALUE
Returns the player index, or -1 if it's not available.
AVAILABILITY
This function is available since SDL 3.2.0.
SEE ALSO
SDL_SetJoystickPlayerIndex(3)
Simple Directmedia Layer SDL 3.2.20 SDL_GetJoystickPlayerIndex(3)