SDL_RunOnMainThread - Call a function on the main thread during event processing.

       This function is available since SDL 3.2.0.

       If  this is called on the main thread, the callback is executed immediately. If this is called on another
       thread, this callback is queued for execution on the main thread during event processing.

       Be careful of deadlocks when using this functionality. You should not have the main thread wait  for  the
       current thread while this function is being called with wait_complete true.

callback
              the callback to call on the main thread.

       userdata
              a pointer that is passed to callback.

       wait_complete
              true to wait for the callback to complete, false to return immediately.

       SDL_RunOnMainThread - Call a function on the main thread during event processing.

       for more information.

SDL_IsMainThread(3)

Simple Directmedia Layer                           SDL 3.2.20                             SDL_RunOnMainThread(3)

#include<SDL3/SDL_init.h>boolSDL_RunOnMainThread(SDL_MainThreadCallbackcallback,void*userdata,boolwait_complete);

       It is safe to call this function from any thread.