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

NAME
SDL_CleanupTLS - Cleanup all TLS data for this thread.
SYNOPSIS
#include <SDL3/SDL_thread.h>
void SDL_CleanupTLS(void);
DESCRIPTION
If you are creating your threads outside of SDL and then calling SDL functions, you should call this
function before your thread exits, to properly clean up SDL memory.
THREAD SAFETY
It is safe to call this function from any thread.
AVAILABILITY
This function is available since SDL 3.2.0.
Simple Directmedia Layer SDL 3.2.20 SDL_CleanupTLS(3)