JPH0217536A - Input system for program library - Google Patents

Abstract

PURPOSE:To increase the processing efficiency by detecting the date and time at the time of preparing and updating a program for both data part and directory part. CONSTITUTION:The date and time of the updating of programs A and B are respectively stored into both directory part and data part, the contradiction between the directory part and the data part is detected with the date and time of the updating of the program during the input of the data part and when both are not coincident, the directory part is re-inputted.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a program library for use within a computer system.

[Conventional technology]

A conventional program library consists of a directory section and a data section. The directory section stores the storage location of each program in the data section, and when inputting a program, the directory section is first searched to find the location of the corresponding program.

For example, "Program Product vO83/ES Data Management Commentary (8091-3-042
) J (Published by Hitachi, Ltd.) p47-48.92-9
3 can be mentioned.

[Problem to be solved by the invention]

The above conventional technology has the following first-order problem.

(1) Incorrect data input when library is shared In order to shorten library input time, the directory section that has been input once is stored permanently in memory, and the program in the data section may be input repeatedly as needed. In this case, the contents of the program may be updated during the process, and the area on the library where the program existed may be replaced with the contents of another program.

In this way, if a library is shared by multiple users and there is contention for access, there is a possibility that data will be swapped midway through, leading to the possibility of inputting incorrect data.

(2) Restrictions on library sharing In order to avoid the problem in (1), it is necessary to limit library sharing and perform library input and updating exclusively. Waiting for access requests occurs, resulting in a decrease in processing efficiency and operability.

[Means to solve the problem]

The problem mentioned above is that in order to detect discrepancies between the contents of the directory part and the data part, the program update date and
This can be solved by recording the time.

[Effect]

If the update date and time of the program recorded in the directory and data sections do not match, it is determined that the data section has been updated, and the directory section is entered again.
The position of the latest data section can be recalculated, and incorrect data will not be entered.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows the structure of the program library. The update date and time of programs A and H are stored in both the directory section and the data section as T1. I remember it as T,'. These Tl k, T? is program A
, B are recorded when outputting them to the library.

Figure 2 shows the update date and time of the program while inputting the data section.
This shows a method of detecting inconsistencies between the directory section and the data section using time. Date and time match (TZ
=T'i') If it is, it is assumed that there is no contradiction and the data section is input to the end. Both do not match (TI≠'r 'i))
If so, recognize that there is a contradiction and re-enter the directory part,
Check again for contradictions.

〔Effect of the invention〕

According to the present invention, even if a program library is input and updated at the same time, the contents of input data can always be guaranteed.

In addition, it is not necessary to input and update the library exclusively, there is no need to wait for access, and processing efficiency and operability can be improved.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of a program library according to an embodiment of the present invention, and FIG. 2 is an explanatory diagram of an input method for the program library shown in FIG. A, B...Program name, Pc...Position information of each data section, Tf...Program update date and time, T? ...Program update date and time. English f side

Claims (1)

[Claims] 1. In a program library that consists of a data section that stores program contents and a directory section that stores the program storage location, the date and time when the program was created or updated in both the data section and the directory section. By recording some kind of identification information that can detect whether or not there is a contradiction between the two, even if the library is input and updated at the same time, the synchronization difference between the directory section and the data section can be detected based on the aforementioned date and time, and the latest An input method for a program library, characterized in that a program can be input.