SDL_SetCurrentThreadPriority - Man Page

#include <SDL3/SDL_thread.h>

bool SDL_SetCurrentThreadPriority(SDL_ThreadPriority priority);

Note that some platforms will not let you alter the priority (or at least, promote the thread to a higher priority) at all, and some require you to be an administrator account. Be prepared for this to fail.

priority

the SDL_ThreadPriority to set.

Returns true on success or false on failure; call SDL_GetError() for more information.

It is safe to call this function from any thread.

This function is available since SDL 3.2.0.