/*Initialize status_queues structure Function
Variable Definition:
-- header: header pointer of process_info structure
-- signal: signal that decide process priority
Return value: status_queues structure pointer
*/
STATUS_QUEUES *initStatusQueues(PROCESS_INFO *header, const char signal){
STATUS_QUEUES *schedule = (STATUS_QUEUES*)malloc(sizeof(STATUS_QUEUES)); //status_queues structure
int count; //counter
//Sort the process by id number
sortProcess(&header, NULL);
//Set the process priority as start_time
setProcessPriority(header, 'S');
//Re-sort the process by start_time
sortProcess(&header, NULL);
//Set the process priority as "signal" decided
setProcessPriority(header, signal);
//Initialize the unarrival queue
schedule->queues[0] = header;
//Initialize the other four queues
for (count = 1; count < QUEUES_SIZE; count++){
//Allocate the memory for new queue front pointer
schedule->queues[count] = (PROCESS_INFO*)malloc(sizeof(PROCESS_INFO));
//Assign the front's next as NULL(empty queue)
schedule->queues[count]->next = NULL;
}
return schedule;
}
Process deQueue(PriorityQueue* queue){
Process deletedProcess;
sortProcess(queue);
deletedProcess = PROCESS[FRONT];
FRONT = (FRONT+1) % MAX;
return deletedProcess;
}
