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4363 Serge 1 
/**************************************************************************
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 *
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 * Copyright 2006 Tungsten Graphics, Inc., Bismarck, ND. USA.
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 * All Rights Reserved.
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 *
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 * Permission is hereby granted, free of charge, to any person obtaining a
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 * copy of this software and associated documentation files (the
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 * "Software"), to deal in the Software without restriction, including
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 * without limitation the rights to use, copy, modify, merge, publish,
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 * distribute, sub license, and/or sell copies of the Software, and to
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 * permit persons to whom the Software is furnished to do so, subject to
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 * the following conditions:
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 *
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 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
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 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
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 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
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 * USE OR OTHER DEALINGS IN THE SOFTWARE.
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 *
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 * The above copyright notice and this permission notice (including the
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 * next paragraph) shall be included in all copies or substantial portions
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 * of the Software.
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 */
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/*
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 * List macros heavily inspired by the Linux kernel
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 * list handling. No list looping yet.
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 */
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#include
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typedef struct _drmMMListHead
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{
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    struct _drmMMListHead *prev;
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    struct _drmMMListHead *next;
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} drmMMListHead;
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#define DRMINITLISTHEAD(__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 DRMLISTADD(__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 DRMLISTADDTAIL(__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 DRMLISTDEL(__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 DRMLISTDELINIT(__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 DRMLISTENTRY(__type, __item, __field)   \
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    ((__type *)(((char *) (__item)) - offsetof(__type, __field)))
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#define DRMLISTEMPTY(__item) ((__item)->next == (__item))
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#define DRMLISTSINGLE(__list) \
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	(!DRMLISTEMPTY(__list) && ((__list)->next == (__list)->prev))
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#define DRMLISTFOREACH(__item, __list)					\
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	for ((__item) = (__list)->next;					\
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	     (__item) != (__list); (__item) = (__item)->next)
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#define DRMLISTFOREACHSAFE(__item, __temp, __list)			\
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	for ((__item) = (__list)->next, (__temp) = (__item)->next;	\
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	     (__item) != (__list);					\
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	     (__item) = (__temp), (__temp) = (__item)->next)
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#define DRMLISTFOREACHSAFEREVERSE(__item, __temp, __list)		\
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	for ((__item) = (__list)->prev, (__temp) = (__item)->prev;	\
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	     (__item) != (__list);					\
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	     (__item) = (__temp), (__temp) = (__item)->prev)
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#define DRMLISTFOREACHENTRY(__item, __list, __head)                            \
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	for ((__item) = DRMLISTENTRY(typeof(*__item), (__list)->next, __head); \
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	     &(__item)->__head != (__list);                                    \
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	     (__item) = DRMLISTENTRY(typeof(*__item),                          \
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				     (__item)->__head.next, __head))
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#define DRMLISTFOREACHENTRYSAFE(__item, __temp, __list, __head)                \
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	for ((__item) = DRMLISTENTRY(typeof(*__item), (__list)->next, __head), \
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	     (__temp) = DRMLISTENTRY(typeof(*__item),                          \
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				     (__item)->__head.next, __head);           \
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	     &(__item)->__head != (__list);                                    \
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	     (__item) = (__temp),                                              \
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	     (__temp) = DRMLISTENTRY(typeof(*__item),                          \
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				     (__temp)->__head.next, __head))
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#define DRMLISTJOIN(__list, __join) if (!DRMLISTEMPTY(__list)) {	\
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	(__list)->next->prev = (__join);				\
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	(__list)->prev->next = (__join)->next;				\
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	(__join)->next->prev = (__list)->prev;				\
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	(__join)->next = (__list)->next;				\
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}