UPDATE METHOD, UPDATE DEVICE, AND UPDATE PROGRAM

摘要

When a hypervisor (131) receives a presence notification, the reference object of a node is expansion-set (S403), an old node (N1) is generated (S404), and a downloader (135) is notified (S405) of the start of downloading. When a check result notification (unused) is received from a linker (134), a call prohibition is set (S410) of an object library (a.dll). When the call prohibition is set, the hypervisor (131) notifies (S411) the downloader (135) of a delete command of an old a.dll. When the hypervisor (131) receives a notification that deletion has completed, the identification bit of the old node (N1) is rewritten (S414) from "0" to "1". Then, the call prohibition of the object library (a.dll) is removed (S415). As a result, non-stop updating is achieved while reducing system scale and cost.