JPH1083313A - Message simultaneously transmitting system and method for it - Google Patents

Abstract

PROBLEM TO BE SOLVED: To accelerate a transmitting time by reducing time for processing the whole system. SOLUTION: Table information including the addresses of mail boxes 31 to 3N (N is a natural number not less than 3) corresponding to each task 41 to 4N (N is a natural number not less than 1) to transmit is transferred to a transmission part 6 as parameters. Therefore, the transmission part 6 simultaneously transmits to the plural mail boxes 31 to 3N by once starting based on table information to improve operability and transmission performance. On the other hand, through the use of table information distributed as the parameter, a transmission part 3 transmits a message to the mail boxes 31 to 3N corresponding to the tasks 41 to 4N at each transmission destination to simplify processing on a transmission side and to reduce the number of the times of access to a stack with the starting of the transmission part and the switching of operation to the transmission part to reduce time for processing the whole system to accelerate a transmission speed and to improve transmitting performance.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a simultaneous message transmission system and a simultaneous message transmission method, and more particularly to a real-time operating system (real-time operating system).
S) The present invention relates to a message simultaneous transmission system and a message simultaneous transmission method for transmitting to a plurality of tasks in (S).

[0002]

2. Description of the Related Art Conventionally, there is a message transmission system for transmitting a message to a plurality of tasks on a real-time operating system (hereinafter, referred to as a real-time OS). In such a message transmission system, an access address of one destination mailbox and a pointer of a transmission message are given as parameters to the transmission unit. That is, in the conventional message simultaneous transmission system, the transmitting task and the receiving task have a one-to-one correspondence, and even when transmitting the same message to a plurality of tasks at the same time, the transmitting task is separately performed by each partner task. Had to be sent to. Therefore, in this type of transmission system, a transmission unit that performs a transmission operation is activated every time transmission is performed, and thus the transmission task and the transmission unit have a relationship as illustrated in FIG. That is,
In this system, the operation of the transmission task and the operation of the transmission unit are switched n times (n is a natural number of 3 or more) and the information is transmitted to the reception task.

[0003]

However, in a conventional message transmission system using a real-time OS, a transmission task and a reception task have a one-to-one correspondence, and the same message is transmitted to a plurality of reception tasks. Even when transmitting simultaneously, the transmitting task must transmit separately to the receiving task of each other party, and the transmitting unit must be called each time, so that access to the stack, In addition, it was necessary to frequently switch the operation to the transmission unit. Therefore, in this type of system, when the same message is transmitted to a plurality of tasks at the same time, there is a problem that the processing time of the entire system becomes slow.

[0004] It is an object of the present invention to provide a message simultaneous transmission system and a message simultaneous transmission method for shortening the processing time of the entire system and increasing the transmission speed when the same message is simultaneously transmitted to a plurality of tasks. Is to do.

Another object of the present invention is to improve the transmission performance by simultaneously transmitting a message to a plurality of partners by one activation of the transmission unit and simplifying the processing on the transmission side. It is in.

Still another object of the present invention is to reduce the number of times of access to the stack and the number of switching of operations to the transmission unit upon activation of the transmission unit, thereby reducing the processing time of the entire system, thereby improving operability. Is to improve.

[0007]

SUMMARY OF THE INVENTION A message simultaneous transmission system and a message simultaneous transmission method according to the present invention provide a real-time OS in which a plurality of tasks simultaneously transmit and receive messages via a mailbox. The table information including the box address is passed to the transmission unit as a parameter. Accordingly, the transmission unit can simultaneously transmit to a plurality of mailboxes by one activation based on the table information, so that operability and transmission performance can be improved.

In the present invention, the transmitting unit transmits a message to the mailbox corresponding to the task of each transmission destination using the table information passed as a parameter, thereby simplifying the processing on the transmission side. The number of times the access to the stack and the switching of the operation to the transmission unit due to the activation of the transmission unit are reduced, so that the processing time of the entire system can be reduced, and the transmission speed is increased and the transmission performance is improved. Can be.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a message simultaneous transmission system and a message simultaneous transmission method of the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram showing a system to which a simultaneous transmission method according to one embodiment of the present invention is applied. This system includes a transmission task unit 1 for transmitting a message, a real-time operating system (OS) 2 for controlling an actual transmission operation, and mailboxes 31 to 3N for receiving a message (N is a natural number of 3 or more).
And the receiving task units 41 to 4N (N is a natural number of 1 or more), the main parts of which are configured.

The transmission task section 1 receives a table section 8 for storing address information of a mailbox corresponding to each destination task and a table pointer of the table section 8, and transmits a message to the corresponding mailbox. And a transmitting unit 6 that performs a transmitting operation based on the transmitting function to be performed.

FIG. 2 is a diagram showing a specific configuration of the mailbox address storage table 8 in the transmission task unit 1 shown in FIG. The mailbox address storage table 8 includes mailbox addresses 1 to N corresponding to each destination task, and a table stopper indicating the end of the table.

Next, the operation of the embodiment of the simultaneous message transmission system and the simultaneous message transmission method of the present invention will be described. FIG. 3 is a flowchart illustrating the operation of the simultaneous message transmission system according to the embodiment of the present invention.

Referring to FIG. 3, in step 101 (hereinafter abbreviated as S101), the simultaneous transmission system in the transmission task moves the pointer of the first registered mailbox address. Next, S102
To determine whether or not the mailbox address is a table stopper indicating the end of the table.

If the mailbox address is not the table stopper indicating the end of the table (Yes in S102)
), The process ends without performing the following process. If the mailbox address is not the table stopper indicating the end of the table (N in S102)
In the case of (o), the process proceeds to S105, and the corresponding mailbox is activated for transmission.

Further, in S106, the pointer is moved to the next registered mailbox address, and the determination in S102 is performed again.

Next, the operation of this embodiment will be described in more detail with reference to FIGS. In FIG. 1, transmission task 1
Obtains the mailbox address corresponding to each destination task, stores it in the mailbox address storage table 8 shown in FIGS. 1 and 2, and passes the pointer of the table to the transmission unit 6 as a parameter.

The transmitting unit 6 moves the pointer from the pointer delivered in S101 to the first registered mailbox address, and then in S102
It is determined whether or not it is a table stopper. If it is not the table stopper, control is passed to the OS to transmit to the mailbox in S105, and then the pointer is moved to the registered mailbox address in S106, and the process returns to step 102.
If it is determined in step 102 that the table stopper is used, the transmitting unit 6 ends the process.

As a result, as shown in FIG. 4, the transmission task 1 only activates the transmission unit 6 once using the mailbox address storage table 8, and each mail registered in the mailbox address storage table 8 is activated. The same message can be sent to the box. In this case, the number of times the access to the stack and the switching to the operation to the transmission unit 6 due to the activation of the transmission unit 6 can be extremely reduced.

FIG. 6 is a diagram showing a first modified embodiment of the present invention. In this modified example, the area (Al, A2, A3) where the mailbox address storage table 8 stores the address of the mailbox corresponding to each destination task
And a table stopper indicating the end of the table, and that receiving tasks 41 to 43 corresponding to the mailboxes 31 to 33 are provided.

The transmission task 1 obtains a mailbox address corresponding to each transmission destination task, stores it in the mailbox address storage table 8, and stores the addresses in the areas Al and A.
The pointer of the table in which A2 and A3 are set can be passed to the transmitting unit 6 as parameters. This transmission unit 6
Transfers the control to the real-time OS 2 so that the mailbox address registered first from the passed pointer is not the table stopper but to the mailbox A corresponding to the receiving task A.

Next, the pointer is moved to the registered mailbox address. Similarly, start sending,
Mailboxes 31 to 31 corresponding to the receiving tasks 41 to 43
After the control is transferred to the OS for transmission to the OS 33, when the mailbox address registered next becomes the table stopper, the process is terminated.

FIG. 6 is a view showing a second modified embodiment of the present invention. In this modified example, a plurality of tasks 71 to 7N and 91 to 9N that do not distinguish between a transmission task and a reception task are provided.
Mailboxes 31-3N, 81-corresponding to each task
8N is different from the above embodiment and the first modified embodiment.

In this modified embodiment, when the tasks 91 to 9N are on the transmitting side, the tasks 71 to 7N are on the receiving side, and operate in the same manner as in the above embodiment. When the tasks 71 to 7N are on the transmitting side, the tasks 91 to 9N are on the receiving side,
The operation is the reverse of that of the above embodiment, but the same operation is performed in any case.

In the second modified embodiment described above, each of the tasks 71 to 7N and 91 to 9N simultaneously transmits the same message to a plurality of destinations, so that the transmission task and the reception task are not distinguished. Messages can be transmitted and received, the tasks 71 to 7N and 91 to 9N can be used for general purpose, and the transmission and reception performance of the system can be improved.

In the above-described embodiment, the first and second modified embodiments, a plurality of tasks correspond to each task to be transmitted using the real-time OS 2 which simultaneously transmits and receives messages via a mailbox. The table information including the address of the mailbox is passed to the transmission unit 6 as a parameter. Thereby, the transmitting unit 6 can simultaneously transmit to a plurality of mailboxes by one activation based on the table information, and thus operability and transmission performance can be improved.

In the present embodiment, the first and second modified embodiments, the transmission unit 6 uses the table information of the mailbox address storage table 8 passed as a parameter to correspond to the task of each transmission destination. By transmitting a message to the mailbox, the processing on the transmission side is simplified, the number of access to the stack upon activation of the transmission unit 3 and the number of switching operations to the transmission unit 3 are reduced, and the processing time of the entire system Can be reduced,
As a result, the transmission speed can be increased and the transmission performance can be improved.

[0027]

According to the present invention described above, based on the table information which is the mailbox address corresponding to each destination task passed as a parameter,
By starting the transmission unit once, transmission processing can be performed simultaneously on a plurality of tasks, so that the operation time of the entire system can be reduced, and operability and transmission performance can be improved. Can be.

Further, according to the present invention, the transmitting unit transmits a message to the mailbox corresponding to the task of each transmission destination by using the table information passed as a parameter, so that the transmission unit transmits the message to the stack. And the number of times of switching the operation to the transmission unit and the operation of the transmission unit is reduced, the processing time of the entire system can be reduced, and the transmission speed can be increased and the transmission performance can be improved. Can be.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of an embodiment of a simultaneous message transmission system and a simultaneous message transmission method of the present invention.

FIG. 2 is a diagram showing a configuration of a mailbox address storage table in FIG. 1;

FIG. 3 is a flowchart illustrating the operation of the embodiment of the present invention.

FIG. 4 is a timing chart illustrating the operation of the simultaneous message transmission system according to the embodiment of the present invention.

FIG. 5 is a block diagram illustrating a configuration of a first modified example of the present invention.

FIG. 6 is a block diagram illustrating a configuration of a second modified example of the present invention.

FIG. 7 is a timing chart for explaining the operation of a conventional simultaneous message transmission system.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Transmission task part 2 Real-time OS 6 Transmission part 8 Mailbox address storage table 31-3N Mailbox 41-4N Reception task part 71-7N Task part 81-8N Transmission part 91-9N Task part

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Miwa Shirahata Inventor Miyagi NEC Co., Ltd.

Claims (7)

[Claims] 1. A message simultaneous transmission system in which a real-time operation system unit for controlling transmission is connected to a plurality of mailboxes for receiving messages, wherein information including an access address of the mailbox of each destination is stored. A message simultaneous transmission system, comprising: a table means for performing transmission to a plurality of mailboxes simultaneously based on the table information. 2. The simultaneous message transmission system according to claim 1, further comprising an interface unit for simultaneously transmitting the message to the mailbox based on the table information sent from the table unit. 3. The real-time operation system unit transmits simultaneously to the mailbox by one activation based on table information sent from the table means via the interface means. The message simultaneous transmission system according to claim 1 or 2, wherein 4. The real-time operation system unit transmits a message to a mailbox corresponding to a task of each transmission destination based on table information sent from the table unit via the interface unit. The simultaneous message transmission system according to any one of claims 1 to 3. 5. A message simultaneous transmission system in which a real-time operation system section for controlling transmission is connected to a plurality of mailboxes for receiving messages, stores information including an access address of the mailbox of each destination. And transmitting simultaneously to the plurality of mailboxes based on the table information. 6. The real-time operation system unit includes a step of simultaneously transmitting to the mailbox by one activation based on table information sent from the table means via the interface means. 5. The method for simultaneous transmission of messages according to claim 4, wherein: 7. The real-time operation system section includes a step of transmitting a message to a mailbox corresponding to a task of each transmission destination based on table information sent from the table means via the interface means. 7. The simultaneous message transmission method according to claim 5, wherein