Method for controlling process priority in semaphore operation

Details Method for controlling process priority in semaphore operation Method for controlling process priority in semaphore operation

1990-05-15

1993-08-31

Kulik, Paul V.

Boots, shoes, and leggings

395725, 364DIG1, 3642428, 3642816, 3642817, 3642818, G06F 946

Patent

active

052416763

ABSTRACT:
In the P operation of a semaphore operation, the semaphore priority set in the semaphore is compared with the process priority of an execution process. When the semaphore priority is higher than the process priority of the execution process, the process priority is changed to the semaphore priority and the process is executed in accordance with the changed process priority. In the V operation, on the other hand, the semaphore priority is compared with the process priority of the first process which is placed in the wait state. When the semaphore priority is higher than the process priority of the first process in the wait state, the process priority is changed to the semaphore priority and the process is placed in the ready state. Furthermore, the process priority of the process in the ready state is compared with the process priority of an execution process. When the process priority of the process in the ready state is higher than the process priority of the execution process, the execution process is placed in the ready state.

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Kyoritsu Sogo Computer Dictionary, pp. 316-317, 1.2.2.1 Sync. Control and Exclusive Control, (1976).

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