diff options
| -rw-r--r-- | include/qemu/queue.h | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/include/qemu/queue.h b/include/qemu/queue.h index 42bcadfbb1..a98eb3ad79 100644 --- a/include/qemu/queue.h +++ b/include/qemu/queue.h @@ -191,8 +191,19 @@ struct { \ } while (/*CONSTCOND*/0) #define QSLIST_INSERT_HEAD(head, elm, field) do { \ - (elm)->field.sle_next = (head)->slh_first; \ - (head)->slh_first = (elm); \ + (elm)->field.sle_next = (head)->slh_first; \ + (head)->slh_first = (elm); \ +} while (/*CONSTCOND*/0) + +#define QSLIST_INSERT_HEAD_ATOMIC(head, elm, field) do { \ + do { \ + (elm)->field.sle_next = (head)->slh_first; \ + } while (atomic_cmpxchg(&(head)->slh_first, (elm)->field.sle_next, \ + (elm)) != (elm)->field.sle_next); \ +} while (/*CONSTCOND*/0) + +#define QSLIST_MOVE_ATOMIC(dest, src) do { \ + (dest)->slh_first = atomic_xchg(&(src)->slh_first, NULL); \ } while (/*CONSTCOND*/0) #define QSLIST_REMOVE_HEAD(head, field) do { \ |