JPH04251317A - System for protecting and reproducing status of task - Google Patents

Abstract

PURPOSE:To restore the executed status of a task before power supply is interrupted after the power supply is restored so as to eliminate the need for executing the task from the beginning when a power failure occurs or the power supply is interrupted by mistake while the task is executed. CONSTITUTION:When a power supply interruption detecting means 2 detects that power supply to a computer system is interrupted while an information processing section 1 executes processing, the means 2 refers to a task status managing means 3. When it is discriminated that a task is being executed, the means 2 actuates a power supplying means 4 so as to continue voltage supply and the task status storing means 5 stores the content of a memory 8 in a nonvolatile backup memory 7, such as hard disk. When the operation of the means 4 is stopped after storing the content in the memory 7, the computer system is set to a shut-off state. When the power supply to the computer system is restarted, on the other hand, a task status reproducing means 6 expands the task status stored in the memory 7 before the power supply is interrupted in the memory 8 and the information processing section 1 starts operations.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a task state protection and regeneration method, and more particularly to a task state protection and regeneration method that allows a computer operating as a standalone computer to reproduce a task state.

0002

[Prior Art] In conventional computer equipment, when terminating a task that is currently being executed, the normal operating procedure is to store data that needs to be saved on a magnetic disk, etc., and then turn off the power after completing the terminating process. If the computer device's power was accidentally cut off while a task was being executed, or if the power was accidentally turned off before the termination process, the data up to that point would be lost without being saved.

0003

[Problems to be Solved by the Invention] In the above-mentioned conventional computer devices, if there is a power outage while executing a task, or if the power is turned off forgetting the termination process, the situation cannot be reproduced, so the task is re-executed from the beginning. The drawback was that it had to be done.

SUMMARY OF THE INVENTION An object of the present invention is to provide a task state protection and regeneration method that can reproduce the state before power-off and eliminate the above-mentioned drawbacks.

[0005]

[Means for Solving the Problems] The task state protection and regeneration method of the present invention includes a power-off detection means for detecting that the power of a computer device is cut off, and task state management for determining whether a task is being executed. means, task state saving means for saving the state of the task in a backup memory when the power is cut off during execution of the task, power supply means for supplying necessary power while the task state saving means is in operation, and a computer device. and task state reproduction means for reading out the state of the task stored in the backup memory when the power is turned on.

[0006]

Embodiments Next, embodiments of the present invention will be described with reference to the drawings.

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

As shown in FIG. 1, the task state protection and regeneration method of this embodiment includes a power failure detection means 2 that monitors the power supply of the information processing unit 1 and detects a power failure, and a power failure detection means 2 that monitors the power supply of the information processing unit 1 and detects a power failure. When the power-off detection means 2 and the task state management means 3 detect that the power has been turned off during execution of a task, the task state management means 3 stores the state of the task in the memory (
(including registers) 8 to the backup memory 7; a power supply means 4 for supplying necessary power while the task state saving means 5 is in operation;
The task state reproducing means 6 reads out the state of the task stored in the backup memory 7 and expands it to the memory 8 when the power is turned on.

FIG. 2 is a flowchart explaining the operation of this embodiment.

During execution of processing by the information processing unit 1 (step 14)
), when the power-off detection means 2 detects that the computer device is powered off (step 15), it refers to the task state management means 3 (step 16). As a result of the reference, if the task is not being executed, the process ends and the computer device is brought to a halt state; however, if the task is being executed, the power supply means 4 is activated to continue supplying voltage (step 17).
), the task state storage means 5 stores the contents of the memory 8 (including information on registers, etc.) in a non-volatile backup memory 7 such as a hard disk (step 18). After storage, the operation of the power supply means 4 is stopped (step 19).
As a result, the computer device becomes stopped.

On the other hand, when the power of the computer device is turned on, the first initial screen asks whether to reproduce the task or perform normal start processing (step 11). Therefore, when an instruction is given to reproduce the task, the task state reproducing means 6 loads the task state stored in the backup memory 7 before the power is turned off in the memory 8 (step 12), and the information processing section 1 starts operating. If task reproduction is not required, normal start processing is performed (step 13), and the information processing section 1 becomes operational.

0012

[Effects of the Invention] As explained above, according to the task state protection and regeneration method of the present invention, power outage occurs during task execution.
If you accidentally turn off the power, you can restore the task execution state before the power was turned off after restarting by turning the power off and on again.
This has the effect of eliminating the need to start over from the beginning.

[Brief explanation of the drawing]

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

FIG. 2 is a flowchart showing the operation of the embodiment of FIG. 1;

[Explanation of symbols]

1 Information processing department 2 Power interruption detection means 3. Task status management means 4 Power supply means 5. Task state storage means 6 Task state reproduction means 7 Backup memory 8. Memory

Claims (1)

[Claims] [Claim 1] A power-off detection means for detecting that the power of a computer device is turned off; a task state management means for determining whether a task is being executed; task state saving means for saving a task state to a backup memory; power supply means for continuously supplying necessary power while the task state saving means is in operation; and task state reproduction means for reading out the state of the task being stored.