JPH01248240A - Process control system - Google Patents

Abstract

PURPOSE:To control a waiting state of a specific task by providing each store area of a set pattern, a wait pattern, a previous ECB pointer, a next ECB pointer and a holding pointer, on an vent control block (ECB). CONSTITUTION:First of all, a system call is issued by other task, and an ECB 6 and an ECB 12 having ID numbers X, Y are generated in an OS. Subsequently, a task A 18, a task B 19 and a task C 20 issue a system call, set an ID number every task and obtain an access address of the corresponding ECB. Next, the system call is issued by each task and an access address of other ECB which s linked with the ECBs being in the previous ECB pointer store area and the next ECB pointer store area of the ECB corresponding to each ID number is registered. Also, a task D 21 issues a system call and stores a waiting pattern and an access address of its own task in a wait pattern store area and a holding pointer store area of each ECB. In such a way, the task D 21 becomes an execution waiting state.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a process control method in an operating system of an information processing device, and more particularly to a process control method that controls the execution waiting state of a process using a pattern of a plurality of event control blocks.

[Conventional technology]

Conventionally, in this type of process control method, an event flag for synchronization is generated in the operating system (O8) with an identification (ID) number, and a task that waits for a certain event is created after registering the event flag waiting pattern. , and enters the execution waiting state. A plurality of tasks that notify that an event has occurred acquire the access address of the event flag using the ID number, and set a bit pattern in the event flag when the event occurs. At this time, if the event flag is a bit pattern that satisfies the conditions for the task in the waiting state, the task is released from the waiting state and the task is activated.

[Problem that the invention seeks to solve]

In the conventional process control method described above, the number of tasks whose waiting states can be controlled is limited by the number of bits that constitute the event flag queuing pattern. Also, by setting different bit patterns for multiple tasks,
In a system in which it is desired to control the waiting state, there is a problem in that only one waiting pattern can be set for all event occurrence patterns.

[Means for solving problems]

The process control method of the present invention is an operating system in which processes executed in an information processing device are controlled using a management table in main memory called an event control block. A set pattern storage area for setting a pattern, a wait pattern storage area for setting a bit pattern that makes the task in the waiting state satisfy the condition of the event control block, and a task in the waiting state are generated to synchronize the tasks. A first event control block pointer storage area and a second event control block pointer storage area that store access addresses of the event control blocks before and after being linked to the event control block in order to connect the plurality of event control blocks. and a standby pointer storage area for storing an access address of a task in a waiting state, and if the set pattern and the wait pattern of any one of the plurality of event control blocks match 17. The configuration is such that a task that is in a waiting state is activated.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a configuration diagram of an event control block in an embodiment of the present invention. Event control block (ECB) t-t, generated by system call,
It is initialized to zero when it is created. [Set pattern] is a storage area for setting the event occurrence pattern of a task when an event occurs in the task being executed. Wait pattern 2 is a storage area in which a bit pattern for a task in a waiting state to satisfy the ECH condition is set.

The previous ECB pointer storage area 3 is an area for registering the access address of another ECB linked before a certain ECBO. The next ECB pointer storage area 4 is an area for registering the access address of another ECB linked next to a certain ECB. The standby pointer function area 5 is an area for registering the access address of a task in a waiting state. When the bit patterns of ECB set pattern storage area 1 and weight pattern storage area 2 match, this ECB
CBK! Delete all Junk ECBs, release tasks waiting for execution, and resume execution.

FIG. 2 is a configuration diagram for performing task management using the above-mentioned ECB. Here, the current task A18゜Task B19
．． Task C20 and task D21 are in the ready state, and task A18. Task B19. It is assumed that task D21 starts running after task C20 completes running. first,
First, another task issues a system call and calls ECB6. with ID numbers X and Y. Generate ECB12 in O8K.

Next, task A18. Task B19. Task C20 issues a system call, sets an ID number for each task, and acquires the access address of the corresponding ECB. In the example, task A18 acquires the access address of ECB6 with ID number X, and task B19 and tasks C, 20
acquires the access address of ECB 12 with ID number Y. From now on, this access address will be used for ECB operations. Next, each task issues a system call to register the access address of another ECB linked to the ECB in the previous ECB pointer storage area and next ECB pointer storage area of the ECB corresponding to each ID number. In the example, task A18 is the next ECB of ECB6 that has the ID number button.
Register the access address of ECB12 with ID number Yt in the pointer storage area 10, task B19 and task C2
0 registers the access address of the ECB 6 having the ID number button in the previous ECB pointer storage area 15 of the ECB 12 having the ID number button. Next, task D21 issues a system call to register the waiting pattern and the access address of its own task in the wait pattern storage area and standby pointer storage area of each ECB. Thereafter, the task D21 is in an execution waiting state. In the example, task D21 has an ID number button.
A bit pattern of '002' is registered in the wait pattern storage area 14 of the ECB 12 which has the pit turn of the weight pattern storage area 8VC'ool# of the CB6 and the ID number button.The task B19 being executed generates an event. When this happens, a system call is issued from the acquired access address to the set pattern storage area 1:3 of the ECB 12 corresponding to the ID number button, and the event occurrence pattern '001' is set to the logical OR.At this time, the wait pattern storage area 14
It is checked to see if the contents of and the bit pattern of the waiting condition match, but the waiting condition does not match. Next, when task A]8 generates an event, I
ECB60 set pattern storage area 7 corresponding to D number button
Event occurrence pattern by issuing a system call to -001
# is disjunctive and escapes. In this case, since the wait pattern storage area 8 and the bit pattern of the waiting condition match, E
Clear all ECBs linked to CB6 to zero and O
Delete from 8. In the example, the next ECB pointer storage area 10
Since the access address of ECB 12 is registered in , ECB 12 is deleted.

Next, ECB6 is also deleted from O8. At this time,
A system call is issued to the task D21 registered in the standby pointer storage area 11 in the waiting state to release the task D21 from the waiting state and start the task D21.

FIG. 3 shows an example of a system configuration for performing the above-mentioned process control, in which 22 is a main storage device, 23 is an input device, 24 is a control device, 25 is an output device, and 26 is an arithmetic device.

〔Effect of the invention〕

As explained above, according to the present invention, the ECB includes a set pattern, a wait pattern, a previous ECB pointer, a next EC
By providing storage areas for the B pointer and the wait pointer, it is possible to control the wait state of a specific task by setting different bit patterns for each of a plurality of tasks.

[Brief explanation of the drawing]

FIG. 1, FIG. 2, and FIG. 3 are diagrams showing one embodiment. 6.12...Event control block (
ECB), 1, 7.13... Set pattern storage area, 2, 8.14... Weight pattern storage area, 3. 9゜15... Previous ECB pointer storage area, 4.10. 16...Next ECB pointer storage area, 5, 11.17...Waiting pointer storage area, 18...Task A119...Task B120... ...Task C121...Task agent Patent attorney Susumu Uchihara 12 Diagram ZZ

Claims (1)

[Claims] In an operating system that controls processes executed in an information processing device using a management table in main memory called an event control block, when an event occurs in a task that is being executed, a set pattern is stored that sets the event occurrence pattern for this task. a wait pattern storage area in which a task in a wait state sets a bit pattern that satisfies the conditions of the event control block;
A first event control that stores access addresses of the event control blocks before and after the event control blocks linked to the event control block to connect the plurality of event control blocks generated to synchronize tasks in a waiting state. Any event control block among the plurality of event control blocks, comprising a block pointer storage area, a second event control block pointer storage area, and a standby pointer storage area that stores an access address of a task in a waiting state. A process control method characterized in that a task in a waiting state is activated when the set pattern and the wait pattern match.