Provided by: libsdl3-doc_3.2.8+ds-1_all 

NAME
SDL_US_TO_NS - Convert microseconds to nanoseconds.
HEADER FILE
Defined in SDL3/SDL_timer.h
SYNOPSIS
#include "SDL3/SDL.h" #define SDL_US_TO_NS(US) (((Uint64)(US)) * SDL_NS_PER_US)
DESCRIPTION
This only converts whole numbers, not fractional microseconds.
RETURN VALUE
Returns US, expressed in nanoseconds.
THREAD SAFETY
It is safe to call this macro from any thread.
AVAILABILITY
This macro is available since SDL 3.2.0. Simple Directmedia Layer SDL 3.2.8 SDL_US_TO_NS(3)