50 lines
1.2 KiB
C
50 lines
1.2 KiB
C
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#ifndef LAB_SEMP_H
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#define LAB_SEMP_H
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/**************************************************************************
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* Authors: Gary Fleming, Amber McCloughan
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* Class: CIS452 - Operating Systems Concepts
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* Professor: Dr. Greg Wolffe
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* Date: 3/14/2019
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*
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* Library of functions for synchronization
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* using semaphores. Includes the classic
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* wait() and signal() functions, as well as
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* functions for initializing and deleting
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* semaphores.
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*
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* @see semp.c for function implementations.
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***************************************************************************/
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/**
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* Initialize a semaphore. The ID for using the other
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* functions should be returned by the function.
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*
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* @param value, the value to initialize the semaphore to.
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*/
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int semp_init(int value);
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/**
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* Attempts to wait on the semaphore. Subtracts 1 from
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* the internal value of the semaphore.
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*
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* @param semId, the ID of the semaphore.
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*/
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int semp_wait(int semId);
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/**
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* Signals the semaphore. Adds 1 to the internal value
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* of the semaphore.
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*
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* @param semId, the ID of the semaphore.
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*/
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int semp_signal(int semId);
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/**
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* Deletes the semaphore.
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*
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* @param semId, the ID of the semaphore.
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*/
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int semp_destroy(int semId);
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#endif
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