JPS6454540A - Process control system for operating system - Google Patents

Process control system for operating system

Info

Publication number
JPS6454540A
JPS6454540A JP21237587A JP21237587A JPS6454540A JP S6454540 A JPS6454540 A JP S6454540A JP 21237587 A JP21237587 A JP 21237587A JP 21237587 A JP21237587 A JP 21237587A JP S6454540 A JPS6454540 A JP S6454540A
Authority
JP
Japan
Prior art keywords
semaphore
holding
instruction
argument
semaphores
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP21237587A
Other languages
Japanese (ja)
Inventor
Mitsuo Miwa
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NEC Corp filed Critical NEC Corp
Priority to JP21237587A priority Critical patent/JPS6454540A/en
Publication of JPS6454540A publication Critical patent/JPS6454540A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F9/00—Arrangements for program control, e.g. control units
    • G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
    • G06F9/46—Multiprogramming arrangements
    • G06F9/52—Program synchronisation; Mutual exclusion, e.g. by means of semaphores

Landscapes

  • Engineering & Computer Science (AREA)
  • Software Systems (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)

Abstract

PURPOSE:To execute queuing until one goes to vacant, by providing a holding queue time pointer and a holding before-queue pointer corresponding to the respective semaphores, and a display area for displaying to which semaphore this pointer corresponds, on a PCB. CONSTITUTION:A semaphore number display area 8 is provided on a PCB main body. As an instruction to a process control system for expressing a holding queue of a process which is holding in each semaphore by a holding queue time pointer 6, as for a P instruction, at least one or more semaphore numbers become arguments and when one or more semaphores which are not blocked exist among all the semaphores which are designated by this argument, the operation is returned to an instruction issue process, and when all the semaphores have been blocked, the PCB of the issue process is transferred, and the process is brought to holding. As for a V instruction, a unique semaphore number becomes an argument and when the semaphore designated by the argument is not in a blocked state, the operation is returned to the instruction issue process, and if said semaphore is in a blocked state, one PCB is removed from the holding queue of the semaphore designated by the argument, and simultaneously, removed from all the connected holding queues, and the system becomes an execution waiting state.
JP21237587A 1987-08-25 1987-08-25 Process control system for operating system Pending JPS6454540A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP21237587A JPS6454540A (en) 1987-08-25 1987-08-25 Process control system for operating system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP21237587A JPS6454540A (en) 1987-08-25 1987-08-25 Process control system for operating system

Publications (1)

Publication Number Publication Date
JPS6454540A true JPS6454540A (en) 1989-03-02

Family

ID=16621524

Family Applications (1)

Application Number Title Priority Date Filing Date
JP21237587A Pending JPS6454540A (en) 1987-08-25 1987-08-25 Process control system for operating system

Country Status (1)

Country Link
JP (1) JPS6454540A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014153761A (en) * 2013-02-05 2014-08-25 Nec Corp License management device and its management method, license management system, and computer program

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014153761A (en) * 2013-02-05 2014-08-25 Nec Corp License management device and its management method, license management system, and computer program

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