Function vkRegisterDeviceEventEXT 

pub unsafe extern "system" fn vkRegisterDeviceEventEXT(
    device: VkDevice,
    pDeviceEventInfo: *const VkDeviceEventInfoEXT,
    pAllocator: *const VkAllocationCallbacks,
    pFence: *mut VkFence,
) -> VkResult

Available if built with prototypes.