JPS63173136A - Inter-task communication system - Google Patents

Abstract

PURPOSE:To make the change of the content of a current software unnecessary and to accelerate communication, by connecting plural softwares with internal LANs via LAN emulation programs respectively. CONSTITUTION:The current softwares 10a and 10b are operated by the same hardward, and the LAN emulation programs 11a and 11b incorporated in the softwares are connected to an inter-task communication control program 12 as supervisors. In such a way, it is possible to substitute only the function of a LAN at high speed, and no necessity to control on an operating system is required.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a communication method between tasks, particularly in a multitasking system where multiple pieces of software using a single task LAN are run on the same hardware. The present invention relates to a communication method between tasks that does not require changes to existing software and can speed up the time required for communication.

[Background of the invention]

In general, when multiple single-user, single-task application programs are run on a piece of hardware, it is customary to consider each one as a task, and conventionally, communication between tasks in multiple systems (hardware) has been A LAN (Local Area Network) is used. That is, in a normal LAN system, as shown in the schematic perspective view shown in FIG. 2, software of a plurality of hardware la*lb is connected by a communication cable 2 to perform communication between tasks. This is shown in a block diagram as shown in Figure 3, in which the existing software 3 of each hardware 1aslb is
Each LAN control program 4a*4b is installed in a and 3b, and LA
N adapters 5a*5b are connected, and each of the LAN adapters 5a and 5b is connected by a communication cable 2.

However, this conventional LAN communication system performs task communication between software on different hardware, and when multiple pieces of software are run on the same hardware, changes to the existing software are required. There was a problem in that the requested processing speed was also slow.

[Purpose of the invention]

Therefore, the present invention has been made by focusing on the problems of the conventional branching technique as described above.When running existing software for multiple AG4s on the same hardware, it is necessary to change the contents of the existing software. The purpose of the present invention is to provide an inter-task communication method that can significantly speed up the communication by completing the communication only in the memory transfer time.

[Means for solving the problem] In order to achieve this objective, the communication system between cases according to the present invention is characterized in that a plurality of pieces of software are connected to each other via an internal LAN via a LAN emulation program. It is said that

[Effect]

] - As mentioned above, when running multiple pieces of software on the same hardware, the software,
Especially for single-tasking LAN on multi-tasking systems.
When running software that uses an existing software, by connecting the software via the internal LAN, there is no need to change the content if the software already exists.
Moreover, the time required for communication is only the memory transfer time, which greatly speeds up the communication.

〔Example〕

Next, an example of implementation of the present invention will be described in detail with reference to FIG.

FIG. 1 is a block diagram showing a communication system between tasks in which the present invention is implemented. In the figure, 10a and 10b indicate existing software, and the existing software is run by the same hardware. . These respective existing software 10a and 10bjt have LAN emulation programs lla and llb, and these LAN emulation programs 1la to 11b
is connected to an intertask communication control program 12 serving as a kernel (supervisor) to configure an internal LAN system.

That is, according to the inter-task communication method according to the present invention, I,
Only the functions of the AN are to be performed on behalf of the AN at high speed.
In particular, it is assumed that there is no need to control the operating system.

〔Effect of the invention〕

As described above, according to the inter-task communication method according to the present invention, software, especially existing software using a single-task LAN on a multi-task system, can be connected to the same eight-task system by an internal LAN. When running multiple pieces of software using software, the software can be used as is without changing the contents, and the communication time is reduced to just the memory transfer time, greatly speeding up the communication. It has become something that will be done.

[Brief explanation of the drawing]

1 is a block diagram showing a communication method between tasks according to the present invention, FIG. 2 is a schematic perspective view showing a general LAN system, and FIG. 3 is a block diagram of the same. 10a@10b...Existing software 11 a 1
11 l b-LANzmisL/-Shien program 12...Inter-task communication control program Patent applicant Katama Katama Representative Alps Electric Co., Ltd.

Claims (1)

[Claims] An inter-task communication method characterized in that a plurality of pieces of software are each connected to an internal LAN via a LAN emulation program.