list.c

// A task on a task list (and also possibly on an outstanding_task_list.
struct task {
    int priority;
    struct list_node task_list;
    const char *task_name;
    struct list_node outstanding_task_list;
};


void list() {
    printf("list\n");
    struct task mow_lawn     = { .priority=23, .task_name="mow lawn"};
    struct task water_garden = { .priority=22, .task_name="water garden"};
    struct task feed_dog     = { .priority=21, .task_name="feed dog"};

    struct list_node task_list;
    struct list_node outstanding_task_list;

    INIT_LIST_NODE(&task_list);
    INIT_LIST_NODE(&outstanding_task_list);


    list_add(&(mow_lawn.task_list), &task_list);
    list_add(&(mow_lawn.outstanding_task_list), &outstanding_task_list);
    list_add(&(water_garden.task_list), &task_list);
    list_add(&(water_garden.outstanding_task_list), &outstanding_task_list);
    list_add(&(feed_dog.task_list), &task_list);

    struct list_node *pos;
    list_for_each(pos, &task_list) {
    	struct task *tmp = list_entry(pos, struct task, task_list);
    	printf("%i %s\n", tmp->priority, tmp->task_name);
    }

    list_for_each(pos, &outstanding_task_list) {
    	struct task *tmp = list_entry(pos, struct task, outstanding_task_list);
    	printf("%i %s\n", tmp->priority, tmp->task_name);
    }

}