DOKK / manpages / debian 13 / libsdl3-doc / SDL_Condition.3type.en
SDL_Condition(3type) SDL3 DATATYPES SDL_Condition(3type)

SDL_Condition - A means to block multiple threads until a condition is satisfied.

Defined in SDL3/SDL_mutex.h

#include "SDL3/SDL.h"
typedef struct SDL_Condition SDL_Condition;

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

This struct is available since SDL 3.2.0.

SDL 3.2.10 Simple Directmedia Layer