# SDL_SignalCondition Restart one of the threads that are waiting on the condition variable. ## Header File Defined in [<SDL3/SDL_mutex.h>](https://github.com/libsdl-org/SDL/blob/main/include/SDL3/SDL_mutex.h) ## Syntax ```c void SDL_SignalCondition(SDL_Condition *cond); ``` ## Function Parameters | | | | | -------------------------------- | -------- | --------------------------------- | | [SDL_Condition](SDL_Condition) * | **cond** | the condition variable to signal. | ## Thread Safety It is safe to call this function from any thread. ## Version This function is available since SDL 3.2.0. ## See Also - [SDL_BroadcastCondition](SDL_BroadcastCondition) - [SDL_WaitCondition](SDL_WaitCondition) - [SDL_WaitConditionTimeout](SDL_WaitConditionTimeout) ---- [CategoryAPI](CategoryAPI), [CategoryAPIFunction](CategoryAPIFunction), [CategoryMutex](CategoryMutex)