/**
* C 和 C++ 的谁好谁坏的争论还在不断的继续，C语言的使用非常的广范，很多大型的系统都是用C 语言来写的。
* C++ 似乎有更好的编程范式。支持面向对象，模版，省去了很多处理。
* C++ 最好不要滥用，具体问题，具体分析。
*
*/
#include <stdio.h>
#include <stdlib.h>
/**
* 通用链表声明部分
*/
struct list_head {
struct list_head *next, *prev;
};
#define LIST_HEAD_INIT(name) { &(name), &(name) }
#define LIST_HEAD(name) \
struct list_head name = LIST_HEAD_INIT(name)
#define INIT_LIST_HEAD(ptr) do { \
(ptr)->next = (ptr); (ptr)->prev = (ptr); \
} while (0)
static void __list_add(struct list_head * new, struct list_head * prev, struct list_head * next);
static void list_add(struct list_head *new, struct list_head *head);
static void list_add_tail(struct list_head *new, struct list_head *head);
static void __list_del(struct list_head * prev, struct list_head * next);
static void list_del(struct list_head *entry);
static void list_del_init(struct list_head *entry);
static int list_empty(struct list_head *head);
static void list_splice(struct list_head *list, struct list_head *head);
#define list_entry(ptr, type, member) \
((type *)((char *)(ptr)-(size_t)(&((type *)0)->member)))
#define list_for_each(pos, head) \
for (pos = (head)->next; pos != (head); pos = pos->next)
#define NEW_LIST_NODE(type, node) \
{\
node = (struct type *)malloc( sizeof(struct type)); \
if (node == NULL) exit(-1);\
}
#define FREE_LIST(type, p, list_name)\
{\
struct type *posnode;\
while(!list_empty(&(p)->list_name)) {\
posnode = list_entry((&(p)->list_name)->next, type, list_name);\
list_del((&(p)->list_name)->next);\
free(posnode);\
}\
}
/**
* 通用链表实现部分
*/
static void __list_add(struct list_head * new, struct list_head * prev, struct list_head * next)
{
next->prev = new;
new->next = next;
new->prev = prev;
prev->next = new;
}
static void list_add(struct list_head *new, struct list_head *head)
{
__list_add(new, head, head->next);
}
static void list_add_tail(struct list_head *new, struct list_head *head)
{
__list_add(new, head->prev, head);
}
static void __list_del(struct list_head * prev, struct list_head * next)
{
next->prev = prev;
prev->next = next;
}
static void list_del(struct list_head *entry)
{
__list_del(entry->prev, entry->next);
}
责任编辑：小草
