| 摘要 |
<P>PROBLEM TO BE SOLVED: To surely detect, even from an application software side, whether or not processing in a demon process is completed, in a device control system in which a kernel module controls an MMC/SD memory card device via the demon process. <P>SOLUTION: A kernel module utilizes an unused region in the tail of a file name storage region that is a part of existent storage regions, to count and store how many times a read/write command is issued. Furthermore, before issuing the command to and after receiving a response from the MMC/SD memory card device, a demon process counts and stores how many times the read/write command is issued. An operation completion confirmation tool determines whether these count values are matched or not (S370, S375). If matched, normal end is made but if reaching time-out without matching (S350-S360), error end is made, and the result is therefore detected at an application side. <P>COPYRIGHT: (C)2013,JPO&INPIT |
