SDL Wiki
(This is the legacy documentation for stable SDL2, the current stable version; SDL3 is the current development version.)


Wait until a condition variable is signaled.


int SDL_CondWait(SDL_cond * cond, SDL_mutex * mutex);

Function Parameters

cond the condition variable to wait on
mutex the mutex used to coordinate thread access

Return Value

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_CondSignal() or SDL_CondBroadcast() 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.

This function is the equivalent of calling SDL_CondWaitTimeout() with a time length of SDL_MUTEX_MAXWAIT.


This function is available since SDL 2.0.0.


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