Boots – shoes – and leggings
Patent
1978-12-04
1983-07-19
Zache, Raulfe B.
Boots, shoes, and leggings
G06F 900
Patent
active
043947255
ABSTRACT:
A method of and apparatus for executing a family of instructions provides synchronization of processes in a multiprocessing system. Representations of processes awaiting data (information units) such as the completion of an asynchronous operation or the availability of a resource are stored in a memory in a first queue and representations of information units available to processes are stored in memory in a second queue. Transfer of information units between processes is controlled by data elements known as "semaphores" stored in the memory. Each semaphore contains a field having a numerical value identifying which of the two different kinds of queues is present. When a P instruction is executed by a process indicating that the process requires data in order to continue operating or a V instruction is executed indicating that an information unit is available for transfer to another process, a semaphore is addresses and its field tested to determine whether processes or information units are available to enable the information transfer between processes to be effected. Once the information transfer is completed, the field of the addressed semaphore is up-dated.
REFERENCES:
patent: 3297999 (1967-01-01), Shimabukuro
patent: 3449722 (1969-06-01), Tucker
patent: 3496550 (1970-02-01), Schachner
patent: 3548384 (1970-12-01), Barton et al.
patent: 3564504 (1971-02-01), Morenoff et al.
patent: 3665421 (1972-05-01), Rehhausser et al.
patent: 3686641 (1972-08-01), Logan
patent: 3789365 (1974-01-01), Jen et al.
patent: 3848233 (1974-11-01), Lotan et al.
patent: 3938096 (1976-02-01), Brown et al.
Madnick, "Operating Systems", 1974, pp. 251-255, McGraw-Hill.
Bienvenu Jacques
Bradley John J.
Carre Claude
deRivet Philippe-Hubert
Dufond Patrick
Compagnie Honeywell Bull
Eng David Y.
Zache Raulfe B.
LandOfFree
Apparatus and method for transferring information units between does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus and method for transferring information units between , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus and method for transferring information units between will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-754715