diff options
| author | Eric Blake <eblake@redhat.com> | 2021-01-13 16:10:11 -0600 |
|---|---|---|
| committer | Markus Armbruster <armbru@redhat.com> | 2021-01-28 08:08:45 +0100 |
| commit | dc13f40c6ba291e31d09053815c230ed88c8921f (patch) | |
| tree | 3c72e00bf08374a22bf458315b41695716411dd8 /include | |
| parent | 240ee8bd31f7ff7407197588ae800ff554758b4d (diff) | |
qapi: Introduce QAPI_LIST_APPEND
Similar to the existing QAPI_LIST_PREPEND, but designed for use where
we want to preserve insertion order. Callers will be added in
upcoming patches. Note the difference in signature: PREPEND takes
List*, APPEND takes List**.
Signed-off-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Message-Id: <20210113221013.390592-4-eblake@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/qapi/util.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/include/qapi/util.h b/include/qapi/util.h index 6178e98e97..d7bfb30e25 100644 --- a/include/qapi/util.h +++ b/include/qapi/util.h @@ -37,4 +37,17 @@ int parse_qapi_name(const char *name, bool complete); (list) = _tmp; \ } while (0) +/* + * For any pointer to a GenericList @tail (usually the 'next' member of a + * list element), insert @element at the back and update the tail. + * + * Note that this macro evaluates @element exactly once, so it is safe + * to have side-effects with that argument. + */ +#define QAPI_LIST_APPEND(tail, element) do { \ + *(tail) = g_malloc0(sizeof(**(tail))); \ + (*(tail))->value = (element); \ + (tail) = &(*(tail))->next; \ +} while (0) + #endif |