# SDL_GetTicksNS Get the number of nanoseconds since SDL library initialization. ## Header File Defined in [<SDL3/SDL_timer.h>](https://github.com/libsdl-org/SDL/blob/main/include/SDL3/SDL_timer.h) ## Syntax ```c Uint64 SDL_GetTicksNS(void); ``` ## Return Value ([Uint64](Uint64)) Returns an unsigned 64-bit value representing the number of nanoseconds since the SDL library initialized. ## Thread Safety It is safe to call this function from any thread. ## Version This function is available since SDL 3.2.0. ---- [CategoryAPI](CategoryAPI), [CategoryAPIFunction](CategoryAPIFunction), [CategoryTimer](CategoryTimer)