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

NAME
SDL_WaitSemaphore - Wait until a semaphore has a positive value and then decrements it.
SYNOPSIS
#include <SDL3/SDL_mutex.h>
void SDL_WaitSemaphore(SDL_Semaphore *sem);
DESCRIPTION
This function suspends the calling thread until the semaphore pointed to by sem has a positive value, and
then atomically decrement the semaphore value.
This function is the equivalent of calling SDL_WaitSemaphoreTimeout() with a time length of -1.
FUNCTION PARAMETERS
sem the semaphore wait on.
AVAILABILITY
This function is available since SDL 3.2.0.
SEE ALSO
SDL_SignalSemaphore(3), SDL_TryWaitSemaphore(3), SDL_WaitSemaphoreTimeout(3)
Simple Directmedia Layer SDL 3.2.26 SDL_WaitSemaphore(3)