JPH0520103A - Shared memory managing system - Google Patents

Abstract

PURPOSE:To reduce the burden imposed on a user process and to maintain the operation file by providing a shared memory access means, and a file environment maintenance means. CONSTITUTION:A file system generating means 8 generates (flcb) table 6 on a shared memory, based on information of a file information definition film 9, secures an area of main memory files 1-4 on the shared memory, and sets identification information of the main memory files 1-4 to the (flcb) table 6. In the case an access request is executed to the main memory file from a user process 5, a shared memory access means 10 executes an access to the main memory files 1-4, based on information of the (flcb) table 6. When a read/write request is generated to the main memory files 1-4 from a terminal 13, a file environment maintenance means 12 executes an access to the main memory files 1-4, based on information of the (flcb) table 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shared memory management system for managing an interprocess shared data area on a shared memory.

[0002]

2. Description of the Related Art Conventionally, when data is transferred by sharing an area on a shared memory between processes, if the shared area can be recognized only between the processes that perform the processing, the processes can be shared between the processes. The shared data area on the shared memory can be easily accessed. FIG. 5 illustrates a conventional shared memory access method. In FIG. 5, 1 to 4 are main memory files on a shared memory, 5 is a user process, and 6 is a UNIX kernel.

Now, the user process 5 is about to transfer data to the user process 6 having no parent-child relationship by using the main memory files 1 to 4 on the shared memory. Both user processes 5 and 6 use main memory file 1
In order to recognize ~ 4, a key is defined for each main memory file, which is a convention between both processes. In this case, the user process 5 requests the UNIX kernel 7 to acquire the right to use the main memory file corresponding to the key. If the usage right can be acquired, the main memory files 1 to 4 are read and written. When the reading / writing is completed, the user process 5 requests the UNIX kernel 7 to release the right to use the main memory files 1 to 4.

Thereafter, similarly, the user process 6 executes U
It requests the UNIX kernel 7 to acquire the right to use the main memory file for the key, reads from and writes to the main memory files 1 to 4, and issues a request to the UNIX kernel 7 to abandon the right to use the main memory files 1 to 4. . Data is transferred from the user process 5 to the user process 6 by performing the above operation.

[0005]

As described above, data transfer between processes using the shared memory can be easily performed by simply recognizing the key and data structure of the area used by both target processes. it can. However, the information is closed information between each process, and the timing for allocating the area is also performed when each process is first started. For this reason, it is difficult to perform maintenance work such as data setting / reference to the main memory file on the shared memory during the operation test of the user process, resulting in a decrease in test efficiency. Further, when reading / writing the main memory file on the shared memory, the usage right of the shared memory must be secured / abandoned without fail, which affects the production efficiency of the user process.

The present invention has been made in order to solve the above problems, and the main memory file on the shared memory can be grasped as the whole system, and the maintenance work can be easily performed on the main memory file. , A shared memory management method that allows a user process to easily access a main memory file on the shared memory is provided.

[0007]

A shared memory management system according to the present invention is a shared memory management system for managing a data area on a shared memory when data is transferred between processes using the shared memory. , All data is handled as a file unit, and identification information of the file group is collectively managed by one information file, a generating means for generating the file system, and a shared memory based on the identification information of the information file. A shared memory access unit configured by a shared memory interface function group that sets / references data for each data area of the It is characterized by that.

[0008]

According to the present invention, the file system generating means collectively manages the identification information of all the main memory files used in the shared memory by generating the shared memory file system. Then, the shared memory access means and the file environment maintenance means recognize any main memory file on the shared memory by the same method and access the main memory file on the shared memory.

[0009]

【Example】

Example 1. FIG. 1 is a block diagram showing an embodiment of the present invention. In the figure, 1 to 4 are main memory files on the shared memory, 5 is a user process that uses the main memory files 1 to 4, and 6 is an information file for collectively managing identification information for the main memory files on the shared memory. It is a flcb table. The file system generation means 8 generates the flcb table 6 on the shared memory based on the information of the file information definition file 9, and the main memory files 1 to 4 are generated.
Area of the main memory file 1
4 has the function of setting the identification information of No. 4 in the flcb table 6. The shared memory access means 10 has a function of accessing the main memory files 1 to 4 based on the information in the flcb table 6 when the user process 5 makes an access request to the main memory files 1 to 4. The user process 5 uses the symbol file 11 to set the main memory file name to the main memory file No. Has been converted to. The file environment maintenance means 12 has a function of accessing the main memory files based on the information in the flcb table 6 when a read / write request is issued from the terminal 13 to the main memory files 1 to 4.

FIG. 2 is a detailed diagram of the flcb table 6, and FIG. 3 is an operation flowchart of the file environment generation process. The detailed operation of the file system generation means 8 will be described with reference to FIGS. 2 and 3. The file environment generation process 14 is started when the computer is started up, and the contents of the file information definition file 9 are fetched in step 51. The file information definition table 9 is a file that defines the attributes (file type, number of records, record size) of all main memory files on the shared memory. Step 52
The attributes of all main memory files imported by flcb
Set in Table 6. In step 53, the areas of the main memory files defined in the flcb table 6 are secured in the shared memory one by one.

In step 54, as a result of step 53, U
The shared memory ID assigned to the secured area transferred from the NIX kernel 7 is set to the position of the corresponding file in the flcb table 6. In step 55,
It is checked whether or not the area reservation in the shared memory of the main memory file defined in the flcb table 6 is completed. If the area reservation main memory file remains, the process returns to step 52. finish. By the above operation, all the main memory files defined in the file information definition file 9 are secured in the shared memory.

Further, FIG. 4 shows a shared memory access unit 1.
The operation of shared memory access will be described with reference to FIG. In step 61, the shared memory ID assigned to the main memory file to be accessed is fetched from the flcb table 6. Step 6
UNI based on the shared memory ID imported by 2
A usage right acquisition request is issued to the X kernel 7. Step 6
In 3, the pointer to the main memory file obtained from the UNIX kernel 7 at the time of acquiring the usage right is aligned with the head of the internal buffer. If the request to the main memory file is a read, the read processing from the main memory file is performed in step 64, and if the request is a write request, the write processing in step 65 is performed.

When the access to the main memory file is completed, the usage right of the target main memory file is abandoned in step 66. File environment maintenance means 1
In No. 2, since the method of accessing the shared memory file system is the same as that of the shared memory access unit 10, the description of the operation based on the flowchart is omitted, and only different processing will be described. The shared memory access means 10 uses the file No. as the information for identifying the target main memory file. Is received from the user process 5, but the file environment maintenance means 1
In 2, the file N is entered by keyboard input from the terminal 13.
o. To receive.

[0014]

As described above, according to the present invention, by providing the shared memory access means between the user process and the shared memory, it is possible to reduce the load on the user process, and the file environment maintenance means. By providing the above, it is possible to allow the tester of the user process to maintain the main memory file on the shared memory and improve the test efficiency.

[Brief description of drawings]

FIG. 1 is a block diagram illustrating a shared memory management method according to an exemplary embodiment of the present invention.

FIG. 2 is a detailed diagram showing a file environment according to the present invention.

FIG. 3 is a flowchart showing the operation of the file environment generating means according to the present invention.

FIG. 4 is a flowchart showing the operation of the shared memory access means according to the present invention.

FIG. 5 is a detailed diagram showing a conventional shared memory access method.

[Explanation of symbols]

 1 Main Memory File 2 Main Memory File 3 Main Memory File 4 Main Memory File 5 User Process 6 User Process 7 UNIX Kernel 8 flcb Table 9 File Information Definition Table 10 Shared Memory Access Means 11 Symbol File 12 File Environment Maintenance Means 13 Terminal 14 Files Environment generation process

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[Procedure amendment]

[Submission date] November 1, 1991

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Claim 1

[Correction method] Change

[Correction content]

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0007

[Correction method] Change

[Correction content]

[0007]

A shared memory management system according to the present invention is a shared memory management system for managing a data area on a shared memory when data is transferred between processes using the shared memory. treat all data as a file unit, the identification information of the files 1
A file system for collectively managing with one information file, a generation means for generating those file systems, and a shared memory interface for setting / referring data to each data area on the shared memory based on the identification information of the information files It is characterized in that it is provided with a shared memory access means composed of a function group and a file environment maintenance means for performing maintenance on the file group on the shared memory based on the contents of the information file.

Claims (1)

Claim: What is claimed is: 1. In a shared memory management method for managing a data area in a shared memory when data is transferred between processes using the shared memory, all data is set as a file unit. Handle and identify the file group 1
A file system for collectively managing with one information file, a generation means for generating those file systems, and a shared memory interface for setting / referring data to each data area on the shared memory based on the identification information of the information files A shared memory management method comprising: a shared memory access means composed of a function group; and a file environment maintenance means for maintaining a file group on the shared memory based on the contents of an information file.