JPS61134844A - Share space control system for storage device - Google Patents

Abstract

PURPOSE:To improve the data processing efficiency by defining a space to be shared among plural tasks and delivering a share declaration. CONSTITUTION:The memory area of a main storage device 2 stores an inter- task share control table 2-1, task control tables 2-2a and 2-2b and tasks 2-3a, 2-3b-. Then a share space 2-6 is defined first by the task 2-3a and secured when the share space 2-6 is used to secure mutual share for tasks 2-3a and 3-3b. The task 3b share the same task space with the task 2-3a and is going to share the information with the task 2-3a by means of the space 2-6. Thus the reference of the information is possible for the task 2-3b. The share state of the space 2-6 is released when the information on the space 2-6 is unnecessary for either one of both tasks. Thus an independent proper space is available to these tasks.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention is applicable to data processing systems to dynamically define a shared space that can be mutually referenced between a plurality of arbitrary tasks. This invention relates to a shared space control method in a storage device that can be resolved.

[Prior art]

Conventionally, in this type of storage device, the correspondence of shared space between multiple tasks at one unit was not possible. Is it fixedly defined during system generation?

Or it was fixedly defined when the task was created.

To that end, according to the progress of a certain process. This method has the disadvantage that it is not possible to define and eliminate any shared space limited between specific tasks at any time.

[Purpose of the invention]

An object of the present invention is to eliminate the above-mentioned conventional drawbacks.

An object of the present invention is to provide a shared space control method in a storage device that can dynamically define and eliminate an arbitrary inter-task shared space between specific tasks at any time.

[Structure of the invention]

A storage device shared space control method according to the present invention is as follows.

As shown in Figure 1, any one of multiple tasks
an inter-task common space definition means for defining a space to be shared between tasks according to a request from one task; and a task for making the defined inter-task common space to be shared as a common space by another specified task. inter-task shared space sharing means; and inter-task shared space sharing release means for releasing sharing of the shared space from the one task or another task sharing the inter-task shared space by the inter-task shared space sharing means. and.

and an inter-task shared space eliminating means for eliminating the defined inter-task shared space after the sharing is canceled by the means.

[Summary of operation of the invention]

In the shared space control method according to the present invention, when a space is shared between a plurality of arbitrary tasks, the tasks attempting to use the shared space define the space to be shared at any time, and further declare the sharing. By doing this, from the time the sharing declaration is made, the tasks mentioned above will be able to use the shared space specified in the sharing declaration, and the sharing of the shared space will be canceled for the tasks that are sharing the shared space. This makes it possible to eliminate the shared space defined as .

[Embodiments of the invention]

Next, a shared space control system according to the present invention will be described with reference to embodiments and drawings.

FIG. 2 is a block diagram showing the configuration of an embodiment according to the present invention. In the figure, 1 is a central processing unit, and 2 is a main storage device controlled by the central processing unit. The storage area of the main storage device 2 includes an inter-task shared space management table 2-1. Task management cheedel 2-2a, 2-
2b, Task (A) 2-3a.

Task (B) 2-3b, segment table (ST)
2-4a, 2-4b, page table (FT) 2-5
．． and a common space 2-6 are accommodated, respectively.

When attempting to mutually share information using the shared space 2-6, an inter-task shared space is first defined by the task (A) 2-2w, and the tasks can access it together. On the other hand, task (B) 2-3b attempts to share information with task (A) 2-3a using the inter-task shared space.

Task (A) 2-3 By sharing the inter-task shared space defined by a, task (A) and task (B) can access the same inter-task shared space, and can mutually exchange information in the inter-task shared space. can be viewed and updated.

Information on the inter-task shared space can cancel the sharing of this inter-task shared space and make the space that was previously used as the inter-task shared space available for use as a space unique to the own task.

Note that when the sharing of the inter-task shared space is canceled, if there are no more tasks sharing the inter-task shared space,
The inter-task shared space is returned and the inter-task shared space is canceled. The control procedure for the shared space described above is shown in FIG.

FIG. 4 is a diagram for explaining a management method for inter-task shared space. To explain the management of the inter-task shared space with reference to this figure, when defining the inter-task shared space, the inter-task shared space management table has the task shared space identifier specified or the task shared space identifier automatically assigned. (12, 13, 14) are created. This created table is used to define the inter-task shared space from the inter-task shared space management queue. At this time, the task shared space identifier is controlled to be internal to the system. Additionally, when the inter-task shared space is canceled, the inter-task shared space management table with the task shared space identifier specified for cancellation is removed from the management queue, and the removed inter-task shared space management table is deleted. As a result, the inter-task shared space is resolved.

When sharing a shared space between tasks, the task queue pointer of the shared space management table between tasks (12, 13, 14) that has the shared space identifier of the task that made the sharing request is set to the shared task (19, 20, 21゜22). The inter-task shared space is shared by queuing the corresponding task management tables (15, 16, 17, 18). Additionally, when the inter-task shared space sharing is canceled, the task management table to be unshared is removed from the task queue of the inter-task shared space management table with the specified task shared space identifier, and the inter-task shared space sharing is canceled. will be held.

FIG. 5 is a diagram for explaining a method of sharing the inter-task shared space. To explain the inter-task shared space sharing method with reference to this figure, when defining the inter-task shared space, among the entries in the inter-task shared space definition (ST) 31, the entry of the segment designated as the inter-task shared space is defined as an inter-task shared space, a page table (FT) 33 is secured for the inter-task shared space, and the start address of this page table (FT) 33 is the corresponding segment of the segment table (BT) 31.
set in the entry. After that, actually shared space 2-6
When using the inter-task shared space, the real memory of the inter-task shared space is secured, and the address of the real memory is registered in the page table (FT) 33, so that the inter-task shared space can be accessed.

When sharing the inter-task shared space, the segment table (ST) 3 of the task that is already using the inter-task shared space
The segment entry corresponding to the specified inter-task shared space in 1 is copied to the corresponding segment entry in the segment table (ST) 32 of the task that made the sharing request, and the page table (F
T) By sharing 33, it becomes possible to share a shared space between tasks. Furthermore, when the inter-task shared space sharing is canceled, among the entries in the segment table (ST) 31 or 32 of the task whose sharing is to be canceled, the entry of the segment corresponding to the specified inter-task shared space is cleared. Sharing of the specified task from the inter-task shared space is canceled.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, it is possible to define the required amount of inter-task shared space to be used between specific tasks at any time, and to share it only for a necessary period. This has a significant effect on improving data processing efficiency.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of a shared space control system according to the present invention, FIG. 2 is a block diagram showing the configuration of an embodiment according to the present invention, and FIG.
FIG. 4 is a flowchart showing the shared space control procedure in the embodiment of one CQ diagram, FIG. 4 is a diagram for explaining the inter-task shared space management method in the embodiment of FIG. FIG. 3 is a diagram for explaining a method for sharing an inter-task shared space in the illustrated embodiment. In the figure, 1 is a central processing unit, 2 is a main memory, 2-
1 is an inter-task shared space management table. 2-2a, 2-2b are task management tables, 2-3a
. 2-3b is a task, 2-4a and 2-4b are segment tables, 2-5 is a page table, and 2-6 is a shared space. io-

Claims (1)

[Claims] Inter-task shared space definition means for defining a space to be shared between tasks according to a request from any one of a plurality of tasks; For one other task,
An inter-task shared space sharing means for sharing the inter-task shared space as a shared space, and a task for releasing the sharing of the shared space from the one task sharing the inter-task shared space or from another task using the inter-task shared space sharing means. 1. A shared space control method in a storage device comprising: an inter-task shared space release means; and an inter-task shared space elimination means for resolving the defined inter-task shared space after the sharing is released by the means.