1477     int fence_fd;  in AcquireNextImageKHR()  local
1478     err = window->dequeueBuffer(window, &buffer, &fence_fd);  in AcquireNextImageKHR()
1490             swapchain.images[idx].dequeue_fence = fence_fd;  in AcquireNextImageKHR()
1496         window->cancelBuffer(window, buffer, fence_fd);  in AcquireNextImageKHR()
1501     if (fence_fd != -1) {  in AcquireNextImageKHR()
1502         fence_clone = dup(fence_fd);  in AcquireNextImageKHR()
1506             sync_wait(fence_fd, -1 /* forever */);  in AcquireNextImageKHR()
1520         window->cancelBuffer(window, buffer, fence_fd);  in AcquireNextImageKHR()
1733                     int fence_fd;  in QueuePresentKHR()  local
1734                     err = window->dequeueBuffer(window, &buffer, &fence_fd);  in QueuePresentKHR()
1746                         img.dequeue_fence = fence_fd;  in QueuePresentKHR()