US6330528B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of terminating temporarily unstoppable code executing in a multi-threaded simulated operating system
Assignee: Hewlett Packard Development Co LP
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Filing: 1998-12-16
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Granted: 2001-12-11
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Expires: 2018-12-16
Abstract
Abstract An operating system is simulated to run in conjunction with a native operating system, allowing processes, particularly multi-threaded processes, originally developed for the simulated operating system to be ported to the environment of the native operating system with a minimum of effort. In their natural environment the processes being ported have the capability of requesting that other processes be terminated. This capability is provided in the simulated system and in a multi-threaded environment of the simulated system. Processes executing in the simulated system, even if multi-threaded, also have the capability of protecting against being stopped when executing critical code.
Inventors
- 👤 Cheng-Yu Huang
- 👤 Siddhesh Jere
- 👤 Jeffrey D. Merrick
- 👤 Sudesh Saoji
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:09
CPC Classifications
G; G06; G06F; G06F9/00; G06F9/06; G06F9/46; G06F9/48; G06F9/4806; G06F9/4843; G06F9/44; G06F9/455; G06F9/45533; G06F9/45537
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
156 words
In a computing multi-threaded environment that allows a first process to terminate operation of a second process, a method of allowing protected code of the second process to complete before terminating the second process by the first process, the method including the steps of: associating with the second process a stopmode value and a qstop value, the stopmode value indicating that the second process cannot be terminated when anything other than a first state, and the qstop value indicating that at least one prior attempt has been made to terminate the second process; incrementing the stopmode value prior to execution of protected code by the second process to indicate that the second process cannot be stopped; checking the stopmode value at the completion of execution of the protected code, and if the stopmode value is a first state, checking the qstop value; terminating the second process if the qstop value is not a first predetermined state.
Claim 2
Dependent Claim
156 words
In a computing multi-threaded environment that allows a first process to terminate operation of a second process, a method of allowing protected code of the second process to complete before terminating the second process by the first process, the method including the steps of: associating with the second process a stopmode value and a qstop value, the stopmode value indicating that the second process cannot be terminated when anything other than a first state, and the qstop value indicating that at least one prior attempt has been made to terminate the second process; incrementing the stopmode value prior to execution of protected code by the second process to indicate that the second process cannot be stopped; checking the stopmode value at the completion of execution of the protected code, and if the stopmode value is a first state, checking the qstop value; terminating the second process if the qstop value is not a first predetermined state.
Claim 3
Dependent Claim
32 words
The method of claim 1 , wherein in response to a request for termination of the second process from the first process the qstop value is changed to a second predetermined state.
Claim 4
Dependent Claim
121 words
In a multi-threaded processing environment, a method for allowing a first process terminate execution of a second process only after completion of protected code that includes the steps of: providing the second process with a stopmode value that, when set to a first value indicates the second process cannot be stopped, and when set to at least a second value indicates that the process can be stopped; incrementing the stopmode value to the first state prior to execution of protected code by the second process; terminating the second process if the stopmode value is set to the second state, providing the second process with a qstop value having a first state indicative that a termination of the second process was attempt.
Claim 5
Dependent Claim
121 words
In a multi-threaded processing environment, a method for allowing a first process terminate execution of a second process only after completion of protected code that includes the steps of: providing the second process with a stopmode value that, when set to a first value indicates the second process cannot be stopped, and when set to at least a second value indicates that the process can be stopped; incrementing the stopmode value to the first state prior to execution of protected code by the second process; terminating the second process if the stopmode value is set to the second state, providing the second process with a qstop value having a first state indicative that a termination of the second process was attempt.
Claim 6
Dependent Claim
35 words
The method of claim 3 , including the step of the second process exiting execution of the protected code to check the qstop value and if in the first state the second process terminating execution.
Claim 7
Dependent Claim
28 words
The method of claim 3 , wherein execution of the second process includes spawning one or more threads, each of the one or more threads including protected code.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2004-12-10 | 2005-06-11 | 2005-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-12-10 | 2009-06-11 | 2009-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-12-10 | 2013-06-11 | 2013-12-11 | $7700.00 | Window Closed / Lapsed |