Computer, method of controlling computer, and recording medium onto which method of controlling is recorded

摘要

In the present invention, a computer in which a plurality of programs are executed under a management of an Operation System having a memory management mechanism includes a unit for ensuring atomicity of a first user process without requiring a dedicated CPU instruction. The unit for ensuring atomicity includes a unit for detecting an interrupt by a second user process, a unit for canceling the first user process by utilizing a memory protection function possessed by said Operating System, and a unit for executing an operation of the first user process again.