FIFOq.h

/*
 * Problem 3 - Discontinuities
 * TCSS 422 A Spring 2016
 * Bun Kak, Chris Ottersen, Mark Peters, Paul Zander
 */

#ifndef FIFOQ_H
#define FIFOQ_H

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "PCB.h"

#define this this_
#define FIFO_NULL_ERROR 431
#define FIFO_CONSTRUCT_ERROR 433
#define FIFO_STRING_ERROR 439

#define NODE_NULL_ERROR 401
#define NODE_CONSTRUCT_ERROR 409
#define NODE_STRING_ERROR 419
#define NODE_DATA_ERROR 421

#define FIFOQ_TOSTRING_MAX (PCB_TOSTRING_LEN * 100)

typedef struct FIFOq *FIFOq_p;
typedef struct Node_type Node;
typedef Node *Node_p;

struct FIFOq
{
    int size;
    Node_p head;
    Node_p tail;
};

struct Node_type
{
    int pos;
    PCB_p data;
    Node_p next_node;
};

FIFOq_p FIFOq_construct(int *);

void FIFOq_destruct(FIFOq_p,
                    int *);              // deallocates pcb from the heap
int FIFOq_init(FIFOq_p,
               int *);              // sets default values for member data
int FIFOq_is_empty(FIFOq_p, int *);

void FIFOq_enqueue(FIFOq_p, Node_p, int *);

void FIFOq_enqueuePCB(FIFOq_p, PCB_p, int *);

PCB_p FIFOq_dequeue(FIFOq_p, int *);

char *FIFOq_toString(FIFOq_p, char *, int *,
                     int *); // returns a string representing the contents of the pcb

Node_p Node_construct(PCB_p data, Node_p next, int *ptr_error);

int Node_init(Node_p this, PCB_p, Node_p, int *);

int Node_destruct(Node_p this);

PCB_p Node_getData(Node_p this, int *ptr_error);

int Node_setData(Node_p this, PCB_p data);

Node_p Node_getNext(Node_p this, int *ptr_error);

int Node_setNext(Node_p this, Node_p next);

char *Node_toString(Node_p this, char *str, int *ptr_error);

Node_p FIFOq_remove_and_return_next(Node_p curr, Node_p prev, FIFOq_p list);

int is_null(void *this, int *ptr_error);

int FIFOq_test_main(int argc, char **argv);

#endif /* FIFOQ_H */