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aio-posix: make AioHandler deletion O(1)

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It is not necessary to scan all AioHandlers for deletion.  Keep a list
of deleted handlers instead of scanning the full list of all handlers.

The AioHandler->deleted field can be dropped.  Let's check if the
handler has been inserted into the deleted list instead.  Add a new
QLIST_IS_INSERTED() API for this check.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Sergio Lopez <slp@redhat.com>
Message-id: 20200214171712.541358-5-stefanha@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Stefan Hajnoczi
2020-02-14 17:17:11 +00:00
parent 195ed8cb36
commit 4749079ce0
3 changed files with 43 additions and 19 deletions
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3
include/qemu/queue.h
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@ -158,6 +158,9 @@ struct { \
} \
} while (/*CONSTCOND*/0)
/* Is elm in a list? */
#define QLIST_IS_INSERTED(elm, field) ((elm)->field.le_prev != NULL)
#define QLIST_FOREACH(var, head, field) \
for ((var) = ((head)->lh_first); \
(var); \