Provided by: libsdl3-doc_3.2.26+ds-2_all 

NAME
SDL_MS_TO_NS - Convert milliseconds to nanoseconds.
SYNOPSIS
#include <SDL3/SDL_timer.h>
#define SDL_MS_TO_NS(MS) (((Uint64)(MS)) * SDL_NS_PER_MS)
DESCRIPTION
This only converts whole numbers, not fractional milliseconds.
MACRO PARAMETERS
MS the number of milliseconds to convert.
RETURN VALUE
Returns MS, 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 3.2.26 SDL_MS_TO_NS(3)