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Class Information
Number: 718/108
Name: Electrical computers and digital processing systems: virtual machine task or process management or task management/control > Task management or control > Process scheduling > Multitasking, time sharing > Context switching
Description: Subject matter comprising means or steps for saving and restoring state data (i.e., context) of a task, process, or thread in a preemptive, nonpreemptive, or cooperative multitasking system.

Patents under this class:
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Patent Number Title Of Patent Date Issued
5129087 Computer system and a method of monitoring transient data structures in a computer system Jul. 7, 1992
5127098 Method and apparatus for the context switching of devices Jun. 30, 1992
5057997 Interruption systems for externally changing a context of program execution of a programmed processor Oct. 15, 1991
5050067 Multiple sliding register stacks in a computer Sep. 17, 1991
5016161 Method and apparatus for the flow control of devices May. 14, 1991
5008812 Context switching method and apparatus for use in a vector processing system Apr. 16, 1991
4905190 Multiprogram control information processing system with process roll-in from main memory Feb. 27, 1990
4873625 Method and apparatus for extending collation functions of a sorting program Oct. 10, 1989
4851992 Register/saving/restoring system for saving and restoring data in a register of a slave processor Jul. 25, 1989
4835677 System for directly and indirectly accessing control registers by different operating systems based upon value of operating system indication bit May. 30, 1989
4833640 Register bank change including register to register transfer in a data processing system May. 23, 1989
4747040 Dual operating system computer May. 24, 1988
4486831 Multi-programming data processing system process suspension Dec. 4, 1984
4484274 Computer system with improved process switch routine Nov. 20, 1984
4403285 System for automatically releasing a dead lock state in a data processing system Sep. 6, 1983
4047161 Task management apparatus Sep. 6, 1977
4025904 Programmed allocation of computer memory workspace May. 24, 1977

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