119 lines
4.5 KiB
C
119 lines
4.5 KiB
C
/**************************************************************************
|
|
*
|
|
* 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; \
|
|
}
|