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