JPH0588920A - Message queue control method - Google Patents

Abstract

PURPOSE:To shorten the overhead time for file access at the time of generating a message queue. CONSTITUTION:A message queue information table 11 which manages start and end positions of a message string and the message addition position at the time of message registration and message control information 13 which manages the pertinent message data start position and the next message start position are provided. A resource for message registration is preliminarily reserved, and this reserved resource for registration is used for following message registration to reduce the overhead due to file access at the time of generating the message queue of a queuing file 12 on a magnetic storage device 17.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a message queue control method.

[0002]

2. Description of the Related Art A conventional message queue control method is
In addition to message data, the message control information for managing the message queue is stored in the queuing file on the magnetic storage device, and when registering a new message in the message queue, refer to the message control information (queuing Since the message immediately before in the message queue and the own message are connected by reading the file) and updating (writing the queuing file), the queuing file on the magnetic storage device is always accessed.

[0003]

In the above-mentioned conventional message queue control method, in order to newly create a message queue other than the self-message registration process at the time of message registration, a message queue on the queuing file on the magnetic storage device is created. Since the message control information of a message is always referenced (reading the queuing file) and updated (writing the queuing file), there is no overhead for accessing the queuing file on the magnetic storage device in the message queue generation process. There is a drawback of this.

[0004]

A message queue control method of the present invention is a message queue control method of a processing system for controlling a message queue on a magnetic storage device, the message control information being included on the magnetic storage device. It has a message queuing file and a message queue information table in the main memory. When defining the message queue, the resources for the first message registration are secured in advance and the message in the message queuing file on the magnetic memory is stored. Write the control information and the message queue information table in the main memory, reserve it as the resource for registering the first message, and use the reserved resource for registration when registering the first message. First as a registration resource used for During message registered with reserved for the connection with the following message, upon subsequent next message registration is characterized by the use of registration resources reserved in sequence.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described in detail with reference to the drawings.

Referring to FIG. 1, in one embodiment of the present invention, a main storage device 15 storing a message queue information table 11 and a message queuing file storing message control information 13 and message data 14 are stored. It is composed of a magnetic storage device 17 having 12 and a CPU 16.

FIG. 2 shows the details of the message queue information table 11 shown in FIG. 1, in which an area 21 for setting the start position of a message, an area 22 for setting the last position of the message string, and an end position of the message string are shown. An area 22 for setting and an area 23 for setting a message addition position are included. A message data storage position in the message queuing file 12 is set at the beginning position 21 of the message sequence and a final position 22 of the message sequence, and a next message data reservation storage position in the message queuing file 12 is set at the message addition position 23. Is set.

FIG. 3 shows details of the message queuing file 12 shown in FIG. 1, and is composed of a plurality of blocks 31. Each block 31 is an area for storing message control information 13 and message data 14, and one message is composed of blocks for storing message control information.

FIG. 4 shows the message control information 1 shown in FIG.
3 shows the details of 3, and includes an area 41 for setting the own message data start position and an area 42 for setting the own message start position, in which the message data storage position in the message queuing file 12 is set, It is created for each message.

Next, the operation of this embodiment will be described.

When defining a message queue, one block of the blocks 31 of the message queuing file 12 is reserved as a registration resource, and the contents of the block are stored in the message queue information table 1 on the main storage device.
In synchronization with the setting of the head position 21 and the message addition position 23 of the message sequence No. 1, the own message data start position 41 and the own message start position of the message control information 13 on the message queuing file 12 on the magnetic storage device. Write at location 42 and.

At the time of registering the first message, the message addition position 23 of the message queue information table 11 is used as the own message start position of the first message, and the position is added to the block 31 group of the message queuing file 12 secured by the registration of the first message. The used blocks are rearranged, and the contents of the remaining one block are set as the next message registration resource in the message addition position 23 of the message queue information table 11, and at the same time, the message in the message queuing file 12 is rewritten. Own message start position 42 of control information 13
Write in.

At the own message data start position 41 of the message control information 13, the head position of the block 31 group in which the message data 14 is written on the message queuing file 12 is written. That is, when the registration of the first message is completed, the contents of the block 31 of the resource for message registration reserved at the time of defining the message queue is set in the first position 21 of the message queue of the message queue information table 11, and in the message addition position 23. The contents of the remaining one block of the block 31 group used for registering the first message are set.

In the next message registration, the message addition position 23 of the message queue information table 11 is added.
Is used as the start position of the own message, and the message queuing file 12
The blocks used above are rearranged, and the remaining blocks are set as message resource for the next message in the message addition position 23 of the message queue information table 11, and at the same time, the message control on the message queuing file 12 is controlled. By writing the information 13 at the start position of its own message, it is used in sequence. In this way, the resource is reserved for message registration at the time of defining the message queue, and the resource for registration reserved at the time of message registration is used to generate a message queue on the magnetic storage device. A message is stored on the magnetic storage device without performing the processing (reading the queuing file) and updating (writing the queuing file) of the message control information 13 of the message queuing file 12 for connecting the immediately preceding message and the own message. A new queue can be created.

[0015]

As described above, according to the present invention, a part of the message registration resources is reserved in advance when the message queue is defined, and the reserved registration resources are used when the message is registered thereafter. There is an effect that the access to the message queuing file can be reduced and the overhead can be reduced in generating the message queue on the instruction storage device.

[Brief description of drawings]

FIG. 1 is a time to show the configuration of an embodiment of the present invention.

FIG. 2 is a diagram showing a detailed configuration of a message queue information table 11 shown in FIG.

3 is a diagram showing a detailed configuration of a message queuing file 12 shown in FIG.

FIG. 4 is a diagram showing a detailed configuration of message control information 13 shown in FIG.

[Explanation of symbols]

 11 Message Queue Information Table 12 Message Queuing File 13 Message Control Information 14 Message Data 15 Main Storage Device 16 CPU 17 Magnetic Storage Device

Claims (1)

[Claims] 1. A message queue control method for a processing system for controlling a message queue on a magnetic storage device, comprising: a magnetic storage device having a message queuing file including message control information; and a main storage device. It has a message queue information table, and at the time of defining the message queue, reserves the resource for registering the first message in advance and stores it in the message control information of the message queuing file on the magnetic storage device and the message queue information table on the main storage device. Write, reserve as a resource for registering the first message, and use the reserved resource for registration at the time of registering the first message. The remaining resource for registration is used as a resource for registering the next message. Reserved for connection with With placing, the message queue control method during subsequent next messages registered, characterized in that the use of registration resources reserved in sequence.