Function ocl::ffi::clEnqueueReadBuffer

pub unsafe extern "system" fn clEnqueueReadBuffer(command_queue: *mut c_void,
                                                  buffer: *mut c_void,
                                                  blocking_read: u32,
                                                  offset: usize,
                                                  cb: usize,
                                                  ptr: *mut c_void,
                                                  num_events_in_wait_list: u32,
                                                  event_wait_list: *const *mut c_void,
                                                  event: *mut *mut c_void)
                                                  -> i32