Wait until a condition variable is signaled.
int SDL_WaitCondition(SDL_Condition *cond, SDL_Mutex *mutex);
|cond||the condition variable to wait on|
|mutex||the mutex used to coordinate thread access|
Returns 0 when it is signaled or a negative error code on failure; call SDL_GetError() for more information.
This function unlocks the specified
mutex and waits for another thread to call SDL_SignalCondition() or SDL_BroadcastCondition() on the condition variable
cond. Once the condition variable is signaled, the mutex is re-locked and the function returns.
The mutex must be locked before calling this function. Locking the mutex recursively (more than once) is not supported and leads to undefined behavior.
This function is the equivalent of calling SDL_WaitConditionTimeout() with a time length of -1.
This function is available since SDL 3.0.0.