28 lines
492 B
C
28 lines
492 B
C
#ifndef DIJKSTRA_H
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#define DIJKSTRA_H
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#include <sys/sem.h>
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/**
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* return the semaphore associated to the key cle
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* if the semaphore doesn't already exist the function create it with initval token then return it
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*/
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int sem_create(key_t cle, int initval);
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/**
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* take a token on the semaphore semid or wait if none available
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*/
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void P(int semid);
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/**
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* put a token on the semaphore semid
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*/
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void V(int semid);
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/**
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* delete the semaphore semid
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*/
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void sem_delete(int semid);
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#endif
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