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| author | Ben Skeggs <bskeggs@redhat.com> | 2011-12-17 23:37:20 +1000 |
|---|---|---|
| committer | Ben Skeggs <bskeggs@redhat.com> | 2012-04-14 02:47:04 +1000 |
| commit | 0d6350002d74848dd3d1e4d28d514a7ac9d580c9 (patch) | |
| tree | 7160d9cb68222a1ede9b8854c351d203354440b6 | |
| parent | f00efc7ab442f106d3ac7699e80f1f7aee8451f4 (diff) | |
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>
| -rw-r--r-- | libdrm_lists.h | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/libdrm_lists.h b/libdrm_lists.h index 6410f573..8926d8d1 100644 --- a/libdrm_lists.h +++ b/libdrm_lists.h @@ -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; \ +} |