SDL_ThreadID.3type - Man Page

#include <SDL3/SDL_thread.h>

typedef Uint64 SDL_ThreadID;

These are different from SDL_Thread objects, which are generally what an application will operate on, but having a way to uniquely identify a thread can be useful at times.

This datatype is available since SDL 3.2.0.

SDL_GetThreadID(3), SDL_GetCurrentThreadID(3)