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/*
* This file is not copyrighted.
*/
#ifndef _WSBM_UTIL_H_
#define _WSBM_UTIL_H_
#include <stddef.h>
#ifndef containerOf
#define containerOf(__item, __type, __field) \
((__type *)(((char *) (__item)) - offsetof(__type, __field)))
#endif
struct _WsbmListHead
{
struct _WsbmListHead *prev;
struct _WsbmListHead *next;
};
#define WSBMINITLISTHEAD(__item) \
do{ \
(__item)->prev = (__item); \
(__item)->next = (__item); \
} while (0)
#define WSBMLISTADD(__item, __list) \
do { \
(__item)->prev = (__list); \
(__item)->next = (__list)->next; \
(__list)->next->prev = (__item); \
(__list)->next = (__item); \
} while (0)
#define WSBMLISTADDTAIL(__item, __list) \
do { \
(__item)->next = (__list); \
(__item)->prev = (__list)->prev; \
(__list)->prev->next = (__item); \
(__list)->prev = (__item); \
} while(0)
#define WSBMLISTDEL(__item) \
do { \
(__item)->prev->next = (__item)->next; \
(__item)->next->prev = (__item)->prev; \
} while(0)
#define WSBMLISTDELINIT(__item) \
do { \
(__item)->prev->next = (__item)->next; \
(__item)->next->prev = (__item)->prev; \
(__item)->next = (__item); \
(__item)->prev = (__item); \
} while(0)
#define WSBMLISTFOREACH(__item, __list) \
for((__item) = (__list)->next; (__item) != (__list); (__item) = (__item)->next)
#define WSBMLISTFOREACHPREV(__item, __list) \
for((__item) = (__list)->prev; (__item) != (__list); (__item) = (__item)->prev)
#define WSBMLISTFOREACHSAFE(__item, __next, __list) \
for((__item) = (__list)->next, (__next) = (__item)->next; \
(__item) != (__list); \
(__item) = (__next), (__next) = (__item)->next)
#define WSBMLISTFOREACHPREVSAFE(__item, __prev, __list) \
for((__item) = (__list)->prev, (__prev) = (__item->prev); \
(__item) != (__list); \
(__item) = (__prev), (__prev) = (__item)->prev)
#define WSBMLISTENTRY(__item, __type, __field) \
containerOf(__item, __type, __field)
#define WSBMLISTEMPTY(__item) \
((__item)->next == (__item))
#endif
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