void fd_screen_fence_ref(struct pipe_screen *pscreen,
struct pipe_fence_handle **ptr,
struct pipe_fence_handle *pfence);
-boolean fd_screen_fence_signalled(struct pipe_screen *screen,
- struct pipe_fence_handle *pfence);
boolean fd_screen_fence_finish(struct pipe_screen *screen,
struct pipe_fence_handle *pfence,
uint64_t timeout);