void
Dijkstra(int** adj_matrix, int num, int start, int dist[]) {
int i, u, v;
int id, key;
bool* access = malloc(sizeof(bool) * num);
struct PQueue* pq = create_pqueue(num);
for (i = 0; i < num; i++) {
if (i == start) {
dist[i] = 0;
}
else {
dist[i] = infinite;
}
access[i] = false;
insert(pq, i, dist[i]);
}
for(i = 0; i < num; i++) {
extract_min(pq, &u, &key);
access[u] = true;
for (v = 0; v < num; v++) {
if (!access[v] && adj_matrix[u][v] && dist[v] > dist[u] + adj_matrix[u][v]) {
dist[v] = dist[u] + adj_matrix[u][v];
decrease_key(pq, v, dist[v]);
}
}
}
destroy_pqueue(pq);
free(access);
}
/**
* Create process list
* @param pnum Number of processes in the system
* @return List of processes of the system
*/
process init_processes(int pnum)
{
process plist = malloc(sizeof(struct process_t) * pnum);
if (plist == NULL) return NULL;
for(int i = 0; i < pnum; ++i) {
plist[i].state = ST_RELEASED;
plist[i].timestamp = 0;
plist[i].request_timestamp = 0;
plist[i].recv_queue = facility("recvq", 2 * pnum);
plist[i].recvd_from = create_pqueue(2 * pnum);
plist[i].nreplies = 0;
plist[i].pending = malloc(sizeof(int) * pnum);
memset(plist[i].pending, 0, sizeof(int) * pnum);
}
return plist;
}
int main() {
p_queue * priority_Q = create_pqueue(); //sets up a priority queue
srand(time(0));
int i, n, pid = 0, dequeue_Count;
// Queue count
int queue_count = 0;
for (i = 0; i < 10; i++) { // Creates the PCB's and puts them in the Priority Queue.
queue_count++;
// Create and add 10 pcb's to enqueue
for (n = 0; n < 10; n++) {
PCB * pcb = create();
pcb->priority = rand() % 32;; // Assign random priority (0-31 range)
add(priority_Q, pcb);
pcb->pid = pid++;
}
// Print off current state of priority queue:
display(priority_Q, 0, queue_count); //displays the current state of the priority queue after ten additions
printf("\n\n"); //gives gap in display
// Print off PCB's that have been dequeued:
printf("PCB's that have been dequeued:\n");
for (dequeue_Count = rand() %3 + 4; dequeue_Count > 0; dequeue_Count--) { //creates a loop for a random number between 4 and 6
PCB * removed = pop_pcb(priority_Q); //pops a pcb from the priority queue
toString(removed); //prints the contents of the removed pcb
}
printf("\n\n"); //gives a gap in the display
}
display(priority_Q, 1, queue_count); //displays the priority queue
return 0;
}