diff options
Diffstat (limited to 'include/qemu/queue.h')
| -rw-r--r-- | include/qemu/queue.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/include/qemu/queue.h b/include/qemu/queue.h index fcecb70228..60e794a4e3 100644 --- a/include/qemu/queue.h +++ b/include/qemu/queue.h @@ -144,6 +144,20 @@ struct { \ *(elm)->field.le_prev = (elm)->field.le_next; \ } while (/*CONSTCOND*/0) +/* + * Like QLIST_REMOVE() but safe to call when elm is not in a list + */ +#define QLIST_SAFE_REMOVE(elm, field) do { \ + if ((elm)->field.le_prev != NULL) { \ + if ((elm)->field.le_next != NULL) \ + (elm)->field.le_next->field.le_prev = \ + (elm)->field.le_prev; \ + *(elm)->field.le_prev = (elm)->field.le_next; \ + (elm)->field.le_next = NULL; \ + (elm)->field.le_prev = NULL; \ + } \ +} while (/*CONSTCOND*/0) + #define QLIST_FOREACH(var, head, field) \ for ((var) = ((head)->lh_first); \ (var); \ |