JPH06139167A - Method for accessing protocol of user's program - Google Patents

Abstract

PURPOSE:To shorten operation time by accessing different protocols by the same program. CONSTITUTION:Information (addresses, the number of transmitting/receiving data, etc.) to be applied to a service program A 2a for different protocols is separated from a user program 1 as an operation file (1) and a common interface part 3 for respective service programs and a real memory file managing part for managing operation files and records X in a real memory are prepared. When the user program opens the operation file (1) in the case of transferring data by a prescribed protocol A, the common interface part 3 reads out the file (1) and informs information (parameter) corresponding to a specific protocol A to the program A 2a, which is started to execute output operation for instance.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for a user program (network program) to access a service program supporting different protocols.

Normally, when the protocol (so-called control procedure) is different, the interface from the user program is different, so that it becomes necessary to create different user programs corresponding to the respective interfaces.

For example, when a service program of a certain protocol (for example, e-mail, TCP / IP used for remote file transfer, etc.) is accessed, the user program created to access the protocol is different. Protocol {for example, open system interconnection (OS
I) etc.} cannot be applied.

Therefore, the conventional method requires the program writer to newly rewrite the user program for the open system interconnection (OSI) or to recreate it from the beginning.

Therefore, there is a demand for an access method that does not require the creation of such user programs for different interfaces. Also, due to the recent improvement in digitization technology, the speed of networks has increased (eg, digital integrated networks).
(ISDN) has been promoted}, and it is necessary to send and receive a large amount of data at one time in order to effectively use high-speed lines. Moreover, it is necessary to execute the input / output operation in a shorter operation time.

Generally, in a data processing system using a virtual memory system, the memory space of the user and the memory space of the operating system (OS) of the system are divided for the purpose of protecting the data in the memory space of the user. Since they are managed separately, records or buffers on the user program (this is in the user memory space) and buffers on the service providing side (this is the operating system (OS)) Since the transfer operation in page units on the virtual memory always occurs at the time of inputting / outputting to / from the memory space}, the larger the amount of data is transferred, the more time is consumed in the central processing unit (CPU). (Overhead) increases.

Therefore, there is a need for such a data transfer method with less overhead in the central processing unit (CPU).

[0008]

2. Description of the Related Art FIG. 7 is a diagram schematically showing data transfer between user programs, and FIG. 8 is a diagram for explaining record input / output operations in a data processing system employing a virtual storage method. is there.

First, referring to FIG. 7, the user program A
When data is transferred between 1a and the user program B 1b, the user programs A 1a and B 1b arranged in the user memory space of each data processing system.
However, if a predetermined line control procedure such as TCP / IP,
Data was transferred by accessing service programs 2a and 2b that support protocols such as open system interconnection (OSI).

Next, the user program 1a or 1b
The internal operation in the case of performing an output operation between the service program and the service program 2a or 2b will be described with reference to FIG.

1) First, the user program 1a retrieves predetermined data from a file storage device (for example, a predetermined database is built) by opening (OPEN) a file to which data is to be transferred (GET).
Then, it is expanded as a record X for output in the user memory space. At this time, the control parameter (address, data length) is generated, and the address of the control parameter is
Point to the record X.

2) The user program 1a issues a write command {Write (x)} to the service program 2a. 3) In the service program 2a, check the parameters, etc., and if normal, acquire the buffer Y in the system-shared memory space in the operating system (OS) area and control the user program 1a. Transfer.
This operation is because the user memory space cannot be seen from the service program 2a.

4) User program to which the control is transferred 1
a transfers the data of the record X to the buffer Y of the above operating system (OS) area (this area can be recognized by the user program 1a because it is a memory space shared by the system), Transfer control to service program 2a again.

5) The service program 2a transfers data to a predetermined network. The above operation is the operation in the case of output from the user side, but in the case of input as well, the data received in the buffer Y (corresponding to the above for input) is transferred to the user memory space. Transfer to record X (corresponding to the above for input)} is performed.

In this way, transfer (copying) is performed between the record X in the user memory space and the buffer Y in the system-shared memory space for each input / output.

[0016]

In the conventional protocol access method by the user program, since the interface is different for each service program, that is, for each protocol, the user is different from the different interface. I had to prepare a program.

In addition, when inputting / outputting a record on the user program or the buffer X and the buffer Y on the service providing side, as described above, each input / output is stored in the virtual memory. Since a data transfer operation occurs between the user memory space and the system shared memory space, the larger the amount of data sent, the more the overhead in the central processing unit (CPU).
There is a problem that (specifically, processing in page units) increases.

In view of the above-mentioned conventional drawbacks, the present invention provides an access method in which a user program can access each service program supporting different protocols by one interface, specifically, an interface method between protocols. Access that sets each information indicating the difference as an operation file for each protocol, opens the operation file corresponding to the protocol, and accesses through the common interface unit based on the information of the operation file for each protocol. Method, and without copying the data on the real memory between the virtual storage areas of its own data processing system, access with the sequential file interface to generate the sequential file generated on the real memory. Data set of a specified service program or user program. By notifying, in a simple, it is an object to provide a high-speed data transfer interface.

[0019]

1, FIG. 2 and FIG. 3 are explanatory views of the principle of the present invention. FIG. 1 shows the concept of an access method to a service program via a common interface section. 2 shows the concept of service program selection by operation file, and FIG. 3 shows the concept of output operation by real memory file management. The above problems can be solved by the protocol access method of the user program configured as follows.

Service programs with different protocols 2
The information (address, number of sent / received data, etc.) given to a, 2b, ... is separated from the user program 1 as an operation file, and each service program 2a, 2b,
A common interface section 3 for, a real memory file management section 4 for managing the above-mentioned operation file and record Xaa on the real memory are provided, and a service program 2a, which corresponds to the protocol instructed by the user program 1,
2b, ..., and when performing data transfer by a predetermined protocol A, the user program 1 opens the operation file A corresponding to the protocol A, so that the common interface unit 3 The operation file A is read, and the service program A 2a corresponding to the protocol A is notified and the service program A 2a is notified.
When 2a is started and output from user program 1,
When the user program 1 stores the data read from the file storage device in the output record Xaa on the real memory, the real memory file management unit 4 adds the output record list a of the operation file. , The addresses of the records Xaa to are repeatedly stored, the set of transmission data is arranged as a sequential file in the real memory, and when the service program A 2a of the protocol A executes the output operation, The memory file management unit 4 retrieves the address of the set of output records Xaa to arranged on the real memory from the operation file and notifies the service program A 2a of the same. When receiving the data, the service program A 2a The operation file is opened and the service program A 2a
When there is a read from, the real storage address is assigned to the virtual storage address of the input record Y, and the assigned address is repeatedly stored in the input record list b of the operation file, Received data is transferred to the assigned real storage address area (record Y)
data is transferred to the real memory file management unit 4 and the received data set is placed in the real memory, and the address of the placed record Yba is fetched from the real file by the real memory file management unit 4 and stored in the user program. Configure to notify 1

[0021]

When a certain user program (network program) accesses a service program that supports different protocols, the present invention allows the operation files for each protocol to absorb the difference in the access method so that the protocol can be used. It is intended to minimize the difference in the interface due to.

First, when a user program starts access to the service program A of a specific protocol A, information corresponding to the protocol, for example, the address of its own user program, the address of the partner user program By opening the operation file A in which (program name), the number of data to be input / output at one time, and the like are set, the common interface unit refers to the opened operation file A, and the protocols A, B, ... Which service program to access should be determined.

As described above, in the protocol access method according to the present invention, the interface for each service program is defined in the operation files A, B, ..., and the user program corresponds to the operation file A, B.
Just by opening B, ..., the operation files A,
Since the contents of B, ... are notified to the service programs A, B, ..., the user program does not need to define the service program corresponding to the protocol, and all user programs can use the same common interface unit. The service programs A, B, ... Corresponding to the respective protocols A, B ,. The above is the first feature of the present invention.

The second feature of the present invention relates to a high speed interface, and by adopting this access method, input / output operations can be executed at higher speed.

Specifically, it is realized by a technique using the real memory file, the real memory file management unit, and the common interface unit. That is, the user program executes, for example, the input / output processing for the service program A corresponding to the predetermined protocol A using the real memory file. That is, the user program has an interface as a sequential organization file with respect to the real memory file, and executes input / output processing via the real memory file management unit.

The real memory file management is an access method for accessing a set of data on the real memory by a sequential file interface, and the user program first stores a file to be accessed in a file storage. When it is taken out (GET) from the device and is output (Write) as a record X from the file, the above-mentioned real memory file management unit arranges it in the real memory as a record X in the form of a sequential file, and then the record X The leading address of the above is stored in the output record list a of the opened operation file A.

Next, the real memory file management unit retrieves the address of the record X arranged in the real memory file from the operation file and notifies the service program A of the address.

The read operation is also executed by the same processing. That is, when the operation file A is opened from the service program A and read from the service program A, a real storage address is assigned to the virtual storage address of the input record Y, and the operation file A on the operation file A is read. , The allocated address is stored in the input record list b, and the received data input to the buffer on the operating system (OS) area is stored in the allocated real storage address area (record Y) ba ... By repeating the transfer, the set of received data is arranged as a sequential file in the real memory, and when the input operation is completed, the arranged input records Yba ...
The address of is extracted from the above operation file and notified to the user program 1.

As described above, according to the present invention, since the data set on the real memory is input / output as a sequential file, a simple and high-speed access interface can be obtained.

[0030]

Embodiments of the present invention will be described in detail below with reference to the drawings. 1 to 3 described above are explanatory views of the principle of the present invention,
4, 5 and 6 are diagrams schematically showing an embodiment of the present invention, FIG. 4 shows an example of the structure of the operation file, (a) shows the entire structure, b) shows an example of address information in the service program information, and FIG. 5 shows a write operation by real memory file management.
Indicates a read operation based on actual memory file management.

In the present invention, the information given to the service program corresponding to each protocol (the address of the program, the number of data that can be transmitted and received, etc.) is separated from the user program 1 as an operation file,
Further, a common interface unit 3 common to each service program 2a, 2b, ... is provided between the service program 2a, 2b, ... and the user program 1 so that each service program 2a, 2b, ... A means for minimizing the difference in the interface and a real memory file management section 4 provided under the user program 1 are provided.
4 is, for example, the output (Wri
te), the record X of the user memory area is arranged in the real memory area as a set of records Xaa-, and when the output operation from the user program 1 is completed, the addresses of the records Xaa, ab- Means stored in the output record list a of the operation file} to the service programs 2a and 2b, or when the service programs 2a and 2b input data, the real memory file management unit 4 , When the input operation is completed,
Record Yb in which the input data is stored
The means for notifying the user program 1 of the addresses a, bb and the like {stored in the input record list b of the operation file} is the means necessary for carrying out the present invention. The same reference numerals indicate the same objects throughout the drawings.

Hereinafter, referring to FIGS. 1 to 3, FIGS.
The protocol access method of the user program of the present invention will be described with reference to FIG. As shown in Figure 2,
When the operation file A corresponding to the protocol A is opened (OPEN) by the user program (network program) 1, it is set in the operation file A designated by the open operation, for example, at the time of system construction. Service program information A related to the protocol A, such as service program name, address information, and the number of data transmitted / received at one time {see the structure of the operation file shown in FIGS. 4 (a) and 4 (b)} Is analyzed by the common interface unit 3 of the present invention, the service program A to be accessed is determined, and the determined service program A 2a is activated. At this time, the contents of the operation file A are edited into a format that is easily used by the service program A 2a, and the edited information is transferred to the service program A 2a.

As described above, in the present invention, the information for the service program A 2a corresponding to the protocol A is collected and stored in the operation file A, so that the user program 1 stores the operation file A. Simply by opening, the interface common to the service programs A to 2a and 2b can be received.

FIG. 4 shows an example of the structure of an operation file in which the information peculiar to the present invention and peculiar to each protocol are stored. FIG. 4 (a) shows the overall structure, in which the service program information corresponding to each of the above protocols is stored at the beginning, and in the next column, the beginning address of the output record list a is Stores the start address of the input record list b, and each output record list a contains the user program.
1 is the buffer obtained by GET and expanding the output file, or the addresses of records Xaa, ... in the real memory storing the data of record X are stored in ascending or descending order, and the service program is stored in the input record list b. Addresses when the data received by 2a, 2b ~ are stored in the record Yba, ~ in the real memory in ascending order, or
They are stored in descending order.

FIG. 4 (b) shows an example of storing the above service program information. The address of the service program corresponding to TCP / IP, open system interconnection (OSI), etc., the address of the service program of the other party. Alternatively, the service program name or the like of the other party is stored as shown in the figure.

In addition, the service program information includes:
There is the number of data to be transmitted and received at one time. These pieces of information are stored and set in a predetermined area on the real memory in correspondence with each protocol, for example, at the time of initialization processing when the system is constructed.

Next, the write (output) and read (input) operations by the actual memory file management unit 4 will be described with reference to FIGS. It is assumed that the operation file A has already been opened by the access to the service program A 2a from the user program 1 and the real memory file management unit 4 has been called from the common interface unit 3.

The user program 1 fetches the output data (GET) from the file storage device, and records X (DATA1) in the user's memory space (virtual memory space).
Then, edit and expand the data.

Here, when the user program 1 outputs the record X by executing the output command {Write (x)}, in the present invention, the already called real memory file management unit 4 is , The record X in the user memory space is read, and the record X is read in the real memory.
Is arranged as a record Xaa, and the head address of the arranged record Xaa is stored in the output record list a of the operation file.

At this time, that is, the first output data (DATA
When 1) is stored in the record Xaa of the real memory, the same output data exists in both the real memory and the user memory as shown in “α” of FIG. Will be there. {“Β” indicates that the same data exists in both the real memory and the user memory for the next data. } However, at the time when the next output data (DATA2) is edited and expanded in the same record X of the user memory space, the data (DATA1, ...) on the record Xaa on the real memory is , The record does not exist in the user memory space (virtual memory space), and the record X in the virtual memory space is the record Xaa in the real memory.
Has lost its connection with.

Thereafter, each time the output data is newly edited by the user program 1 and expanded into the record X in the user memory space, the real memory file management unit
4, in the form of a sequential file on the real memory,
The head addresses of the arranged records Xab to are arranged in order are stored in the output record list a of the operation file.

At the time when the output operation by the user program 1 is completed, the real memory file management unit 4 addresses the buffer (record X) stored in the output record list a of the operation file. To service program 2a.

Next, referring to FIG. 6, a read operation, that is,
The data receiving operation will be described. First, the service program A 2a opens the operation file A, and when there is a read from the service program A 2a, the real storage address is assigned to the virtual storage address of the input record Y in the user memory space. .

At this time, actually, the input record Y
The virtual storage address is only associated with the real storage address, and the data copying as described in the above-mentioned conventional method is not performed.

Thereafter, the allocated address is stored in the input record list b on the operation file A, and the received data input from the line is stored in the buffer in the operating system (OS) area. Allocated real storage address area (record Y) ba, bb
To the buffer stored in the input record list b on the operation file A at the time when the input operation is completed. By notifying the address of the user program 1 to the user program 1, the contents of the arranged records Yba and bb are sequentially transferred to the input record Y in the user memory space of the user program 1. It Note that “α” and “β” in FIG. 6 are synonymous with “α” and “β” in FIG. 5, so description thereof will be omitted.

As described above, since the output record list a and the input record list b are separated in the operation file of the present invention, the user program 1
Input processing and output processing can be executed in parallel for one file.

As described above, according to the present invention, the information (address, number of transmitted / received data, etc.) given to service programs of different protocols is separated as an operation file from the user program, and a common interface for each service program is provided. Section, the above-mentioned operation file on the real memory, record Xaa, ..., Record Y
By providing a real memory file management unit for managing ba, ...
When performing data transfer with a predetermined protocol A, the user program opens the operation file to
The common interface unit reads out the operation file, notifies the service program A corresponding to a specific protocol A, activates the service program A, and outputs the file from the file storage device to the user when the user program outputs. By storing the data {content of record X} read in the buffer of the memory space in the record Xaa to the real memory by the real memory file management unit,
The real memory file management unit repeatedly stores the addresses of the records Xaa to in the output record list a of the operation file, arranges a set of data on the real memory, and stores the protocol A service program. When A executes the output operation, the real memory file management unit retrieves the address of the record Xaa arranged in the real memory from the output record list a of the operation file and notifies the service program A of it. At the time of data reception, the service program A opens the operation file, and the service program A
From the line, the real storage address is assigned to the virtual storage address of the input record Y in the user memory space, and the received data from the line is assigned to the real storage address area (record Y). It is repeatedly transferred to ba to store the addresses of the records Yba to the input record list b of the operation file to arrange the received data set on the real memory, and the arranged record Yba is arranged. It is characterized in that the real memory file management unit takes out the addresses of to from the operation file and notifies them to the user program.

[0048]

As described above in detail, according to the protocol access method of the user program of the present invention,
Information passed to the service program corresponding to each protocol, that is, the parameters related to the protocol,
Since they are all stored in the operation file, different service programs can be accessed with the same interface, and there is no need to create a protocol-compatible user program.

In data transfer, copying between the user memory space of the virtual storage space and the memory space of the operating system (OS) of the service program is performed in the user program as in the conventional case. No longer needed
The real memory file management unit under the user program stores the addresses of the record X for output and the record Y for input, which are arranged in the form of a sequential file on the real memory,
Since the output record list a and the input record list b on the operation file are used for management, the address of the record X is notified to the service program at the time of writing, and the address of the record Y is notified to the user program at the time of reading. It is expected that the performance at the time of data transfer will be improved.

[Brief description of drawings]

FIG. 1 is an explanatory diagram (1) of the principle of the present invention.

FIG. 2 is an explanatory diagram of the principle of the present invention (No. 2)

FIG. 3 is an explanatory diagram of the principle of the present invention (No. 3)

FIG. 4 is a diagram (1) schematically showing an embodiment of the present invention.

FIG. 5 is a diagram schematically showing an embodiment of the present invention (part 2).

FIG. 6 is a view schematically showing an embodiment of the present invention (No. 3).

FIG. 7 is a diagram schematically showing data transfer between user programs.

FIG. 8 is a diagram for explaining record input / output operation in a data processing system using a virtual storage method.

[Explanation of symbols]

 1 User program (network program) 2a, 2b Service program A, B, ~ 3 Common interface section 4 Real memory file management Operation file a Output record list b Input record list aa, ab ~ ~ Output record X ba, bb , ~ Record Y for input Record X in user's memory space Record Y in user's memory space

Claims (1)

[Claims] 1. Service programs (2) of different protocols
Information (address, number of sent / received data, etc.) given to a, 2b, ...) is separated from the user program (1) as an operation file (), and each service program
Common interface part (3) for (2a, 2b, ...), the operation file () on the real memory, and the record X (a
a)) is provided, and a real memory file management unit (4) is provided to access the service programs (2a, 2b, ...) corresponding to the protocol instructed by the user program (1). When data is transferred by protocol A, the user program (1) opens the operation file (), so that the common interface unit (3) stores the service program information (parameter) of the operation file (). When the user program (1) is read, the service program A (2a) corresponding to the protocol A is notified, the service program A (2a) is activated, and when the user program (1) outputs, the user program (1) is actually executed. Record X (a for output on memory
a), the actual memory file management unit (4) stores the data read from the file storage device into the output record list (a) of the operation file ().
Then, by repeatedly storing the address of the record X (), the set of transmission data is arranged in the real memory, and when the service program A (2a) of the protocol A executes the output operation, the real memory is The file management unit (4) outputs the output records X (aa-) arranged in the real memory.
The address of the set of is extracted from the operation file () and notified to the service program A (2a). When data is received, the operation program () is opened from the service program A (2a), and the service program A (2) is opened. When there is a read from 2a), the real storage address is assigned to the virtual storage address of the record Y for input,
Input record list of the operation file () (b)
Then, the storage of the assigned address is repeated, the received data is transferred to the assigned real storage address area (record Y) (ba-), and the set of received data is stored in the real memory. The address of the arranged record Y (ba-) is allocated to the real memory file management unit.
(4) A protocol access method for a user program, characterized in that the action file () is taken out and the user program (1) is notified.