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/**************************************************************************
*
* Copyright 2006 Tungsten Graphics, Inc., Bismarck, ND. USA.
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sub license, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
* THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
* USE OR OTHER DEALINGS IN THE SOFTWARE.
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial portions
* of the Software.
*/
/*
* List macros heavily inspired by the Linux kernel
* list handling. No list looping yet.
*/
#include <stddef.h>
typedef struct _drmMMListHead
{
struct _drmMMListHead *prev;
struct _drmMMListHead *next;
} drmMMListHead;
#define DRMINITLISTHEAD(__item) \
do{ \
(__item)->prev = (__item); \
(__item)->next = (__item); \
} while (0)
#define DRMLISTADD(__item, __list) \
do { \
(__item)->prev = (__list); \
(__item)->next = (__list)->next; \
(__list)->next->prev = (__item); \
(__list)->next = (__item); \
} while (0)
#define DRMLISTADDTAIL(__item, __list) \
do { \
(__item)->next = (__list); \
(__item)->prev = (__list)->prev; \
(__list)->prev->next = (__item); \
(__list)->prev = (__item); \
} while(0)
#define DRMLISTDEL(__item) \
do { \
(__item)->prev->next = (__item)->next; \
(__item)->next->prev = (__item)->prev; \
} while(0)
#define DRMLISTDELINIT(__item) \
do { \
(__item)->prev->next = (__item)->next; \
(__item)->next->prev = (__item)->prev; \
(__item)->next = (__item); \
(__item)->prev = (__item); \
} while(0)
#define DRMLISTENTRY(__type, __item, __field) \
((__type *)(((char *) (__item)) - offsetof(__type, __field)))
#define DRMLISTEMPTY(__item) ((__item)->next == (__item))
#define DRMLISTSINGLE(__list) \
(!DRMLISTEMPTY(__list) && ((__list)->next == (__list)->prev))
#define DRMLISTFOREACH(__item, __list) \
for ((__item) = (__list)->next; \
(__item) != (__list); (__item) = (__item)->next)
#define DRMLISTFOREACHSAFE(__item, __temp, __list) \
for ((__item) = (__list)->next, (__temp) = (__item)->next; \
(__item) != (__list); \
(__item) = (__temp), (__temp) = (__item)->next)
#define DRMLISTFOREACHSAFEREVERSE(__item, __temp, __list) \
for ((__item) = (__list)->prev, (__temp) = (__item)->prev; \
(__item) != (__list); \
(__item) = (__temp), (__temp) = (__item)->prev)
#define DRMLISTFOREACHENTRY(__item, __list, __head) \
for ((__item) = DRMLISTENTRY(__typeof__(*__item), (__list)->next, __head); \
&(__item)->__head != (__list); \
(__item) = DRMLISTENTRY(__typeof__(*__item), \
(__item)->__head.next, __head))
#define DRMLISTFOREACHENTRYSAFE(__item, __temp, __list, __head) \
for ((__item) = DRMLISTENTRY(__typeof__(*__item), (__list)->next, __head), \
(__temp) = DRMLISTENTRY(__typeof__(*__item), \
(__item)->__head.next, __head); \
&(__item)->__head != (__list); \
(__item) = (__temp), \
(__temp) = DRMLISTENTRY(__typeof__(*__item), \
(__temp)->__head.next, __head))
#define DRMLISTJOIN(__list, __join) if (!DRMLISTEMPTY(__list)) { \
(__list)->next->prev = (__join); \
(__list)->prev->next = (__join)->next; \
(__join)->next->prev = (__list)->prev; \
(__join)->next = (__list)->next; \
}
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