Provided by: libsdl3-doc_3.2.28+ds-1_all 

NAME
SDL_Condition - A means to block multiple threads until a condition is satisfied.
SYNOPSIS
#include <SDL3/SDL_mutex.h>
typedef struct SDL_Condition SDL_Condition;
DESCRIPTION
Condition variables, paired with an SDL_Mutex, let an app halt multiple threads until a condition has
occurred, at which time the app can release one or all waiting threads.
Wikipedia has a thorough explanation of the concept:
https://en.wikipedia.org/wiki/Condition_variable
AVAILABILITY
This struct is available since SDL 3.2.0.
Simple Directmedia Layer SDL 3.2.28 SDL_Condition(3type)