consumer.c

#include <stdio.h>
#include <stdlib.h>
#include <windows.h>

#define MAX_ORDERS 100

typedef enum {
    BURGER,
    FRIES,
    DRINK,
    SALAD
} OrderType;

typedef struct {
    int number;
    OrderType type;
    int preparationTime; // in seconds
    int status; // 0 for preparing, 1 for serving, -1 for empty slot
} Order;

int main() {
    HANDLE hMapFile;
    Order *orders;

    // Open the existing shared memory created by the producer
    hMapFile = OpenFileMapping(FILE_MAP_ALL_ACCESS, FALSE, "SharedMemory");

    if (hMapFile == NULL) {
        perror("OpenFileMapping");
        exit(EXIT_FAILURE);
    }

    orders = (Order *)MapViewOfFile(hMapFile, FILE_MAP_ALL_ACCESS, 0, 0, MAX_ORDERS * sizeof(Order));

    if (orders == NULL) {
        perror("MapViewOfFile");
        CloseHandle(hMapFile);
        exit(EXIT_FAILURE);
    }

    while (1) {
        system("cls"); // Clear screen for updated display on Windows (use "clear" for Unix-like systems)
        printf("Orders in Preparation:\n");
        for (int i = 0; i < MAX_ORDERS; i++) {
            if (orders[i].status == 0) {
                printf("Order %d (Type: %d) - Preparing...\n", orders[i].number, orders[i].type);
                orders[i].status = 1; // Change status to serving
                Sleep(orders[i].preparationTime * 1000); // Simulate preparation time in milliseconds
                printf("Order %d (Type: %d) - Ready to Serve\n", orders[i].number, orders[i].type);
                orders[i].status = -1; // Mark order as served (-1 indicates empty slot)
            }
        }
        Sleep(1000); // Refresh display every second (1 second = 1000 milliseconds)
    }

    UnmapViewOfFile(orders);
    CloseHandle(hMapFile);

    return 0;
}