Function enqueue_write_buffer 

pub unsafe fn enqueue_write_buffer<T, M, En, Ewl>(
    command_queue: &CommandQueue,
    buffer: M,
    block: bool,
    offset: usize,
    data: &[T],
    wait_list: Option<Ewl>,
    new_event: Option<En>,
) -> Result<()>
where
    T: OclPrm,
    En: ClNullEventPtr,
    Ewl: ClWaitListPtr,
    M: AsMem<T> + MemCmdRw,

Enqueues a write from host memory, data, to device memory referred to by buffer.

Safety

Caller must ensure that data lives until the read is complete. Use new_event to monitor it (use [core::EventList::last_clone] if passing an event list as new_event).