Ajout Exo1

ANALE-1/EXO1/SUJET/dijkstra.h

@@ -0,0 +1,27 @@
+#ifndef DIJKSTRA_H
+#define DIJKSTRA_H
+
+#include <sys/sem.h>
+
+/**
+ * return the semaphore associated to the key cle
+ * if the semaphore doesn't already exist the function create it with initval token then return it
+ */
+int sem_create(key_t cle, int initval);
+
+/**
+ * take a token on the semaphore semid or wait if none available
+ */
+void P(int semid);
+
+/**
+ * put a token on the semaphore semid
+ */
+void V(int semid);
+
+/**
+ * delete the semaphore semid
+ */
+void sem_delete(int semid);
+
+#endif