Mechanism for ensuring data coherency during sequential readings of portions of data that changes with time

摘要

An apparatus and a method ensure coherency between portions of data from a data generator which are sequentially read by a reading device at least one portion at a time, even though that data within the data generator is changing with time. The present invention stores a prior status of bits of data from the data generator at a prior time point. The present invention then transfers data portions from this stored data as the reading device continues to sequentially read portions of that stored data of the prior time point. When the reading device has finished reading the portions of the data of the prior time point, the present invention stores a subsequent status of bits of data from the data generator at a subsequent time point. Then, the process for ensuring coherency between portions of data, that are sequentially read, repeats for the subsequent time point. Thus, the present invention allows the reading device to read data portions at a time while ensuring coherency among those portions and thus accuracy in the data read by the reading device.