SDL_Semaphore - A means to manage access to a resource, by count, between threads.

       This struct is available since SDL 3.2.0.

Simple Directmedia Layer                           SDL 3.2.10                               SDL_Semaphore(3type)

       Semaphores  (specifically,  "counting  semaphores"),  let  X number of threads request access at the same
       time, each thread granted access decrementing a counter. When the counter reaches zero,  future  requests
       block until a prior thread releases their request, incrementing the counter again.

       Wikipedia has a thorough explanation of the concept:

       https://en.wikipedia.org/wiki/Semaphore_(programming)

       Defined in SDL3/SDL_mutex.h

       SDL_Semaphore - A means to manage access to a resource, by count, between threads.

#include"SDL3/SDL.h"typedefstructSDL_SemaphoreSDL_Semaphore;