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lists: add nicer+unsafe foreach, and list join macros 

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Signed-off-by: Christoph Bumiller <e0425955@student.tuwien.ac.at>
main
Ben Skeggs 2011-12-17 23:37:20 +10:00
parent f00efc7ab4
commit 0d6350002d
1 changed files with 29 additions and 0 deletions
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29
libdrm_lists.h
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@ -78,6 +78,13 @@ typedef struct _drmMMListHead
#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); \
@ -87,3 +94,25 @@ typedef struct _drmMMListHead
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; \
}