119 lines
4.5 KiB
C
119 lines
4.5 KiB
C
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/**************************************************************************
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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 <stddef.h>
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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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}
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