JP2718377B2 - Waiting system for child task completion - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-programming computer system capable of constituting one job from a plurality of tasks, and more particularly to a child task completion waiting system in a system having a hierarchical structure between tasks constituting jobs. .

[0002]

2. Description of the Related Art The fourth edition of "ACOS-4 / XVP Supervisor Manual, DDA82-4" was issued by NEC in May 1994, and the first edition was issued by NEC in April 1991. "ACOS-4 / X
VP System Macro Programming Handbook, D
In the child task end waiting method in which the parent task waits for the end of the child task disclosed in CC81-1 ", only one child task waiting can be designated.

In the task termination determination method described in Japanese Patent Application Laid-Open No. 2-226427, by specifying one of the child tasks, it is possible to wait for the termination of all the tasks of the descendants of the specified child task. However, if the invoking task has multiple child tasks, they cannot wait for them at the same time.

[0004]

In the prior art, when one parent task wants to wait for the termination of a plurality of child tasks, the user recognizes the names of all the child tasks of the own task on a program. In addition, there is a problem in that the child task termination waiting system provided by the system must be called many times, which complicates the configuration of the user program.

An object of the present invention is to provide a multi-programming computer system environment in which one job can be composed of a plurality of tasks, and in particular, a user programming method in a system environment having a hierarchical structure between tasks constituting a job. The purpose is to improve the degree of freedom.

Another object of the present invention is to provide a child task end waiting system which can wait for the end of all the child tasks of the task by a single call, thereby improving the degree of freedom of programming for the user. It is in.

[0007] Still another object of the present invention is to provide a child task termination which can select whether to wait for termination of a specific child task or all child tasks of the task by one invocation. It is an object of the present invention to provide a queuing system and improve the user's degree of programming.

[0008]

According to a first child task end waiting system of the present invention, a task waiting request is made in a multi-programming computer system in which one job can be composed of a plurality of tasks. A task waiting request identifying means for waiting for the termination of the child task for each child task for all the child tasks of the request task, and returning an end notification of the request task when all the child tasks are completed. Have been.

A second task waiting system for child tasks according to the present invention is a multi-programming computer system in which one job can be composed of a plurality of tasks. A termination semaphore for judging the end of the task based on the presence or absence of an event, and when a task waiting request is issued, for all child tasks of the requested task, the termination semaphore of the child task is assigned to each child task. Task waiting request identification means for performing an event waiting for the termination semaphore after receiving the event, notifying the event to the termination semaphore, and returning to the caller that the requested task has been completed when all the child tasks are completed. It is composed of

[0010] A third child task completion waiting system of the present invention is a multi-programming computer system in which one job can be composed of a plurality of tasks. A termination semaphore for determining the end of a task based on the presence or absence of an event, a child task name list that exists for each task, and the number of child tasks and the name of the child task are registered, and task waiting When a request is made, it is determined whether the request waits for completion of a specific task or all child tasks of the request task, and waits for completion of the specific task. If it is determined that the termination semaphore of the child task to be waited for, Wait for the event, notify the termination semaphore after receiving the event, and when the child task ends, return to the caller the end of the requested task, and terminate all child tasks. If it is determined that the request is a waiting request, the task name list of the requested task is referred to, and for each task registered in the task name list, an event is waited for the termination semaphore of the task. Task termination notification semaphore after receiving the event, notifies the termination semaphore of the event, and, when all the child tasks have been completed, returns to the caller a notification that the requested task has been completed. I have.

A fourth child task completion waiting system according to the present invention is a multi-programming computer system in which one job can be composed of a plurality of tasks. A termination semaphore for determining the end of a task based on the presence or absence of an event, a child task name list that exists for each task, and the number of child tasks of each task and the name of the child task are registered, and a task start Termination semaphore initialization means for initializing a termination semaphore of a task to be started to a state in which no event exists, and a child task list for creating the child task name list of the started task at the start of the task Means, and at the end of the task, the termination semaphore of the task to be terminated. A task end notifying means for notifying an event, and an event waiting for the termination semaphore of the task having the specified task name, and after receiving the event, performing an event notification to the termination semaphore. Task completion waiting means for returning that the task has been completed, and when a task waiting request is made, refer to the task name list of the requesting task, obtain a task name, and execute the task completion waiting means. Waiting task selecting means for repeating the calling process for the number of child tasks, and when a task waiting request is made, whether the request waits for completion of a specific task, or completion of all child tasks of the requesting task And wait for the end of one specific task. If it is determined that the request is to be matched, specify the name of the child task to be waited for, pass control to the task end waiting means, if it is determined to be a request to wait for the end of all child tasks, And a task waiting request identifying means for transferring control to the waiting task selecting means.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to the drawings.

Referring to FIG. 1, a child task completion waiting system according to an embodiment of the present invention exists in units of tasks, notifies an event when each task is completed, and determines the end of the task based on the presence or absence of an event. Semaphore 1 for a task, a child task name list 2 that exists in each task, and the number of child tasks of each task and the name of the child task are registered, and a termination semaphore 1 of the task to be started when the task is started. Semaphore initialization means 11 for initializing the semaphore to a state in which no event exists
And a child task list creating means 12 for creating a child task name list 2 of the task to be started at the start of the task, and a task end notification for notifying the event to the termination semaphore 1 of the task to be ended at the end of the task Means 21
When a task waiting request is made, it is determined whether the request waits for completion of a specific task or all child tasks of the requesting task. If it is determined that the request is to wait for the end of the task, the name of the child task to be waited for is specified, control is passed to the task end waiting means 33, and if it is determined that the request is to wait for the end of all the child tasks. Is a task waiting request identifying means 31 that passes control to a waiting task selecting means 32
When a task waiting request is made, the task name is obtained by referring to the task name list 2 of the request source task,
The waiting task selecting means 32, which repeats the process of calling the task end waiting means 33 for the number of child tasks, waits for an event for the termination semaphore 1 of the task having the specified task name, and after receiving the event, the termination semaphore 1 And a task end waiting means 33 for returning that the task designated as the caller has ended.

Next, a child task completion waiting system according to an embodiment of the present invention will be described with reference to FIGS.

At the start of the task, the termination semaphore initialization means 11 initializes the termination semaphore 1 of the task to be started to a state in which no event exists, and passes control to the child task list creation means 12.

The child task list creator 12 stores the number of child tasks and the names of all child tasks in a child task name list 2 corresponding to the task to be started when the task is started.

At the end of the task, task end notification means 2
1 notifies the termination semaphore 1 of the task to be finished of the event.

Referring to FIG. 2, when a task waiting request is made, the task waiting request identifying means 31
Analyzes the request and determines whether the request waits for the end of one specific task or all child tasks of the requesting task (step 2).
01), if it is determined that the request is a request to wait for the end of a specific task, the name of the child task to be waited for is specified, and control is passed to the task end waiting means 33 (step 202).

If the task waiting request identification means 31 determines in step 201 that the task waiting request is a request waiting for the end of all child tasks, it passes control to the waiting task selecting means 32 (step 203). .

Referring to FIG. 3, when a task waiting request is made, the waiting task selecting means 32
Referring to the task name list 2 of the requesting task, it is determined whether or not the task end waiting means 33 has been called for all child tasks (step 301), and the task end waiting means 33 has been called for all child tasks. If it is determined that the child task is not waiting for completion of the task, it is selected from the child task name list 2 (step 302), and the task name of the selected child task is designated to specify the task completion waiting means 33. And returns to the decision step 301 (step 30).
3).

Referring to FIG. 4, the task end waiting means 33 waits for an event on the termination semaphore 1 of the task having the designated task name, and after receiving the event, notifies the termination semaphore 1 of the event ( Step 401).

Further, the task end waiting means 33 comprises:
It returns that the task specified as the caller has been completed (step 402).

As described above, the processing of the child task completion waiting system according to the embodiment of the present invention is completed.

The child task end waiting system according to one embodiment of the present invention selects, by one invocation, whether to wait for the end of a specific child task or all the child tasks of the task. The present invention has an effect of providing a child task completion waiting system capable of improving a user's degree of freedom in programming.

[0025]

As described above, the child task completion waiting system according to the present invention is a multi-programming computer system environment in which one job can be composed of a plurality of tasks. In a system environment having a hierarchical structure, there is an effect that the degree of freedom of the user's programming can be improved.

Further, the child task completion waiting system of the present invention provides a child task completion waiting system which can wait for the completion of all the child tasks of the task by one call, and provides a user with a high degree of freedom in programming. Has the effect that can be improved.

Further, a child task completion waiting system is provided which allows the user to select whether to wait for the completion of a specific child task or to wait for the completion of all child tasks of the task by one invocation. Has the effect of improving the degree of freedom of programming.

[Brief description of the drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention.

FIG. 2 is a flowchart showing a process of a task waiting request identification unit 31 in one embodiment of the present invention.

FIG. 3 is a flowchart showing processing of a waiting task selecting means processing 32 according to an embodiment of the present invention.

FIG. 4 is a flowchart showing processing of a task end waiting means 33 according to an embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Termination semaphore 2 Child task name list 11 Termination semaphore initialization means 12 Child task list creation means 21 Task end notification means 31 Task waiting request identification means 32 Waiting task selection means 33 Task end waiting means

Claims (2)

(57) [Claims] A job is composed of a plurality of tasks.
Multi-programming computer system
And It exists on a task-by-task basis.
To determine the end of a task based on the presence or absence of an event.
Termination semaphore and It exists for each task, and the number of child tasks and child tasks of each task
A list of child task names with registered task names, When a task wait request is made, the request is
Wait for the completion of a specific task or the request
Whether to wait for all child tasks of the task to finish
And wait for the end of one specific task.
Request, the child task to be waited for
Event waiting for the termination semaphore
After receiving the event
Event notification to the local semaphore and the child task ends.
At that point, the caller is informed that the requested task has been completed.
Must be returned while waiting for all child tasks to complete
If the task is determined to be
Refer to the task name list and register it in this task name list.
For each task that has been terminated
Wait for an event on the semaphore and receive the event
After taking it, the event is sent to the termination semaphore.
When all the child tasks are finished,
Task waiting to return to the source that the requested task has been completed
Child task comprising matching request identification means.
End completion system. 2. One job is composed of a plurality of tasks.
Multi-programming computer system
And It exists on a task-by-task basis.
To determine the end of a task based on the presence or absence of an event.
Termination semaphore and It exists for each task, and the number of child tasks and child tasks of each task
A list of child task names with registered task names, Termination of the started task when the task starts
Initializes the semaphore to a state where no events exist.
-Termination semaphore initialization means, When starting a task, the child task name of the task to be started
Child that creates a list Disk list creation means, At the end of the task, the termination of the task to be terminated
Task end notification means for notifying events to event semaphores
When, The termination session for the task with the specified task name
Wait for event on mafo and receive event
Event notification to the termination semaphore
And then the task specified by the caller ends
Task end waiting means for returning the fact that When the task wait request is made, the requesting task
Refer to the above task name list, obtain the task name, and
The task that calls the task end waiting means is a child task
A waiting task selecting means to be repeated for several minutes, When a task wait request is made, the request is
Whether to wait for the completion of a specific task or the request source
Whether to wait for all child tasks of the task to finish
And wait for the end of one specific task.
Request, the child task to be waited for
Task name, and control the task end waiting means.
Request to wait for the end of all child tasks.
If it is determined that the waiting task selection means
Task waiting request identification means for transferring control to
A child task completion waiting system.