JPH03189819A - Call processing system for program - Google Patents

Abstract

PURPOSE:To easily call an option program from a basic program by referring to that which is obtained by initializing a table corresponding to the option program. CONSTITUTION:An initialization processing part 5 retrieves an option table 8 and discriminates an entry for storing prescribed information, and writes in the contents of an entry of a basic table 6 corresponding thereto. Subsequently, after the initialization processing, a basic program 4 refers to an option table 8 and executes with regard to each function. Accordingly, in the case an extended routine exists, an extended routine of an option program 7 is pointed by the option table 8 and executed. On the other hand, in the case the extended routine does not exist, a basic routine of the basic program 4 is pointed by the option table 8 and executed. In such a manner, the discrimination processing in the basic program becomes unnecessary, and the processing can be simplified.

Description

[Detailed Description of the Invention] [Summary] The purpose of this invention is to make it possible to easily call an optional program from a basic program with regard to the call processing method for programs added to expand functions, and to support each of the basic functions. a basic table that stores an address pointing to a routine of the basic function in an entry corresponding to the basic function; and an option table that has an entry corresponding to the basic table and stores an address or predetermined information pointing to the routine of the extended function in the entry. and an initialization processing unit that initializes the option table is provided in the basic program, and the initialization processing unit sets the basic program corresponding to the entry of the option table that stores the predetermined information. The content of the entry in the table is written, and the basic program is configured to refer to the initialized option table and execute the routine of the basic program or option program.

[Industrial application field]

The present invention relates to a program call processing method.

More specifically, the present invention relates to a method of calling a program added to expand one function.

The performance of a data processing system is largely determined by the performance of the system program. Therefore.

Maintenance improvements (hereinafter simply referred to as functional enhancements) for specification changes 1 and functional enhancements are constantly added to the system programs.

[Conventional technology]

FIG. 6 is an explanatory diagram of the prior art;

4 is a basic program, and 7 is an optional program.

In order to accommodate frequent functional expansions, the system program (9) usually consists of a basic program (4) and an optional program (7) attached thereto. The basic program 4 is a part that implements basic functions, and the optional program 7 is a part that implements expanded functions.

Therefore, each time the function is expanded, an optional program 7 is added to realize the expanded function.

A plurality of functions of the system program are realized partly by the basic program 4 and partly by the optional program 7. For this purpose, the basic program 4 executes processing for a certain function (referred to as X).

The currently combined option program 7(Y) performs processing to determine whether or not an extended function exists for function X. If the option program 7 exists, the option program 7 is called and the extended function X routine is executed. On the other hand, if it does not exist, the routine of the basic function X of the basic program 4 is executed.

[Problem to be solved by the invention]

According to the prior art described above, it is necessary to perform a determination process to call the optional program 7 from the basic program 4. That is, in the basic program 4, the type (function) of the optional program 7 is determined, and the basic program 4
There is a problem in that it has to be determined whether to execute the process of the option program 7 or the process of the option program 7, which makes the process of the basic program 4 complicated.

Furthermore, when the optional program 7 is newly added, there is a problem in that the basic program 4 must also be modified. That is, it is necessary to newly add information regarding the optional program 7 for the 5-discrimination process (that the optional program 7 exists) to the basic program 4. Therefore, basic program 4
The versatility of the system is low, and the burden of creating the system program as a whole becomes large.

SUMMARY OF THE INVENTION An object of the present invention is to provide a program call processing method that makes it possible to easily call an optional program from a basic program.

[Means to solve the problem]

FIG. 1 is a diagram illustrating the principle of the present invention and shows a data processing system according to the present invention.

In FIG. 1, 1 is a data processing system, 2 is a program group, 4 is a basic program, 5 is an initialization processing section, 6 is a basic table, 7 (7-1, 72) is an option program, 8 (8-1) , 8-2) is an option table, and 9 is a unit added for functional expansion.

The program group 2 consists of a basic program 4 and an optional program 7.

The basic program 4 also includes a routine (basic routine) for realizing basic functions and an initialization processing section 5. A basic table 6 corresponding to this is provided. The initialization processing unit 5 initializes the option table 8.

The option program 7 includes a routine (extension routine) that implements an extended function that is an extension of the basic function provided in the basic program 4, and also has an option table 8 corresponding thereto.

The basic program 4 executes its own basic function routine when no extended function exists, and calls the option program 7 and executes the extended function routine when an extended function exists.

The option program 7 and the corresponding option table 8 are added as a unit 9.

[Operation] The basic table 6 has entries corresponding to each of the basic routines of the basic program 4, and stores an address pointing to the basic routine corresponding to each entry.

On the other hand, the option table 8 has entries corresponding to each of the entries in the basic table 6, and each entry stores an address or predetermined information indicating an extended routine. That is, if an extension routine exists in the option program 7, its address is stored, and if it does not exist, predetermined information is stored.

The initialization processing unit 5 searches the option table 8 to determine the entry that stores the predetermined information, and writes the contents of the corresponding entry in the basic table 6 to the entry. That is, the address of the basic routine is stored in the entry where no extended routine exists.

After the above initialization process, the basic program 4 refers to the option table 8 and executes each function. Therefore, if an extended routine exists, the extended routine of option program 7 is pointed to by option table 8 and executed. If no extended routine exists, the basic routine of the basic program 4 is pointed to by the option table 8 and executed.

According to the above, while the discrimination processing in the basic program 4 can be made unnecessary, only a simple initialization process is required, so that the processing in the basic program 4 can be simplified. Furthermore, even if a new option program 7 is added, the initialized version of the option table 8 is referred to.

There is no need to change the basic program 4 and basic table 6. Furthermore, in creating the option table 8, the system administrator who added the option program 7 only needs to set predetermined information in the entry corresponding to the extended routine that does not exist (has not been added). Therefore,
The burden of program creation can be reduced.

〔Example〕

FIG. 2 is a diagram showing the configuration of the embodiment.

3 is a user program, 21 is a basic part, 22 is an optional part, and 7-1 to 7-3 are optional programs.

The program group 2 is a system program of the data processing system 1, and is a basic part 21 consisting of the basic program 4.
and an option section 22 including a plurality of option programs 71 to 7-3.

Program group 2 is called from user program 3. The basic program 4 or the basic part 21 is.

This is a unified interface for the user program 3 at the time of this call.

Option programs 7-1 to 7-3 are extended processing programs A to C having mutually different extended functions.

The basic program 4 executes basic processes 1 to N using a basic routine. Further, for example, the option program 7-1 executes extension processes 1 and 3 using an extension routine, but cannot execute (does not support) extension processes 2 and N. Note that the expansion processing 1 executed by the option programs 7-1 and 7-3 is different from each other. By combining basic processing and extended processing, one large unit of processing is realized.

As shown in the figure, there are a plurality of option programs 7, and one option program 7 supports a plurality of extended functions. In addition, in Figure 1, 9 basic tables 6
and option table 8 are omitted. Option table 8 includes option programs 7-1 to 7-
3, respectively.

Further, the basic program 4 is a program that is always called and executed in any case.

On the other hand, option programs 7-1 to 7-3 are.

The presence or absence of resources in the data processing system l.

System configuration (application) determined by resource processing method, etc.
This is a program that is selected and used depending on the situation. Then, the basic program 4 and the selected option program 7 are combined to form a program that realizes a plurality of functions.

FIG. 3 and FIG. 4 are diagrams illustrating initialization processing.

The figures are shown before and after initialization, respectively.

In FIGS. 3 and 4, 41 to 4n are basic routines, and 71 to 7Ar are extended routines.

61 to 6n are entries of the basic table 6, and 81 to 8n are entries of the option table 8.

The basic program 4 includes routines (basic routines) 41 to 4N that implement basic functions 1 to N.

The basic table 6 includes entries 61 to 6N corresponding to the basic routines 41 to 4N, respectively. Each entry 61 to 6N stores the start address of the corresponding basic routine 41 to 4N.

Option program 7 (eg 7-1).

Basic routines 41, 43. Extended routine 71 corresponding to... ．． 73. ..., on the other hand, basic routine 4
Extension routine 72 corresponding to 2, . . . 4N. ...7
N is not provided, that is, 9. In this optional program 7, basic functions 2. ...Extension function 2 corresponding to N
．． ...N is not added.

Option table 8 (e.g. 8-1) has entry 6
Entries 81 to 8N corresponding to I to 6N, respectively
Equipped with. Each entry 81 to 8N stores the start address of the corresponding extended routine 71.73 for the entry 81.83 where the corresponding extended routine 71.73 exists.

Predetermined information is stored for entries 82.8N that do not have corresponding expansion routines 72.74.

This predetermined information (indicated by ◆ in the figure) is set to a value 2, for example NULL, which does not normally exist as an address.

The system administrator who created and added this option program 7 knows the existence (addition) of extension routines 71 and 73 and their addresses.

This can be set in entry 81.83. Also.

Since extension routines 72.74 were not added, entry 82.8N is set to NULL.

This work is hardly a burden.

The above state as shown in FIG. 3 is changed by the initialization process.
The state is as shown in FIG.

That is, the initialization processing unit 5 determines that the entry 82.8N is NUL.
L, the contents of the entries 62 and 6N corresponding to these are written. Therefore, the ends 1782.8N each point to the start address of the basic routine 42.4N. As a result, the option table 8 points to extended routines if they exist, and points to the basic routines if they do not exist.

FIG. 5 shows the operational processing flow.

(2) Depending on the configuration of the data processing system 1, one optional program 7 (for example 7-1) is selected and combined with the basic program 4;

In response to this, the initialization processing unit 5 of the basic program 4
The option table 8-1 of the combined option program 7-1 is initialized. This allows 5, for example, the 3rd
The option table 8-1 in the state shown in the figure is changed to the state shown in FIG.

■ User program 3 calls basic program 4.

■ In response to a request from the user program 3, the basic program 4 executes processing of a certain function 1.

At this time, as shown in FIG. 4, the extension routine 7I of the extension function 1 is executed.

(2) Similarly to process (2), the basic routine 42 of the basic function 2 is executed for one function 2.

The initialization process in process (2) is performed as shown in FIG. 5(B).

■ Set parameter 1 to 0.

■ Compare i with the number N of entries in option table 8 (8-1).

If the number N of entries is not greater than i, the process ends.

■ If the number of entries N is greater than 1, the i-th entry (for example, 82) in option table 8-1 is
Check whether it is ULL or not.

(i) If it is NULL, write the contents of the i-th entry (ie, 62) of the basic table 6 into the entry 82 concerned.

(2) If not NULL (without performing process (2)), and after process (2), set 1ti-to1. After this, repeat the process ① and the following.

The basic routine or extended routine in processes (1) and (2) is executed as shown in FIG. 5(C).

■ The basic program 4 refers to the entry in the option table 81 that corresponds to the function X to be executed.

Then, the subroutine jumps to the address within the entry.

■ The basic routine or extended routine to which the jump was made is executed. At this time, the basic program 4 can also be executed without distinguishing whether the execution routine is a basic routine or an extended routine.

〔Effect of the invention〕

As explained above, 1. According to the present invention, in the process of calling a program added to expand functions, the basic program for calling is It is possible to simplify processing by reducing the burden on the program, and it is also possible to eliminate the need to change the basic program each time the program is added.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the principle configuration of the present invention. FIG. 2 is a configuration diagram of an embodiment. 3 and 4 are diagrams illustrating initialization processing. FIG. 5 is a flowchart of operation processing. FIG. 6 is a diagram illustrating a conventional technique. ■ is a data processing system, and 2 is a program group. 4 is a basic program, 5 is an initialization processing section, 6 is a basic table, 7 (7-1, 7-2) is an option program, 8 (8-1, 8-2) is an option table 19 is for functional expansion It is a unit added to. Operation processing flow Figure 5 (Part 1) (B) Operation processing flow Figure 5 (Part 2)

Claims (1)

[Claims] Basic program (4
) and an optional program (7) that includes routines for realizing extended functions. Basic table (6
), and an option table (8) that has an entry corresponding to the basic table (6) and stores an address or predetermined information pointing to the routine of the extended function in the entry, and the option table (8) An initialization processing unit (5) for initializing is provided in the basic program (4), and the initialization processing unit (5) performs an initialization process for an entry in the option table (8) storing the predetermined information. The basic program (4) refers to the initialized option table (8) and writes the contents of the entry in the basic table (6) corresponding to the basic program (4).
) or the routine of the optional program (7).