From: Peter Xu <pet...@redhat.com>

In monitor_qmp_read(), we have the hack to temporarily replace the
cur_mon pointer.  Now we move this hack deeper inside the QMP dispatcher
routine since the Monitor pointer can be actually obtained using
container_of() upon the parser object, just like most of the other JSON
parser users do.

This does not make much sense as a single patch.  However, this will be
a big step for the next patch, when the QMP dispatcher routine will be
split from the QMP parser.

Reviewed-by: Stefan Hajnoczi <stefa...@redhat.com>
Reviewed-by: Eric Blake <ebl...@redhat.com>
Signed-off-by: Peter Xu <pet...@redhat.com>
Message-Id: <20180309090006.10018-7-pet...@redhat.com>
[eblake: rebase context of qobject_to() macro]
Signed-off-by: Eric Blake <ebl...@redhat.com>
---
 monitor.c | 17 ++++++++++-------
 1 file changed, 10 insertions(+), 7 deletions(-)

diff --git a/monitor.c b/monitor.c
index b5acc92b735..83e98741b4c 100644
--- a/monitor.c
+++ b/monitor.c
@@ -3762,7 +3762,9 @@ static void handle_qmp_command(JSONMessageParser *parser, 
GQueue *tokens)
 {
     QObject *req, *rsp = NULL, *id = NULL;
     QDict *qdict = NULL;
-    Monitor *mon = cur_mon;
+    MonitorQMP *mon_qmp = container_of(parser, MonitorQMP, parser);
+    Monitor *old_mon, *mon = container_of(mon_qmp, Monitor, qmp);
+
     Error *err = NULL;

     req = json_parser_parse_err(tokens, NULL, &err);
@@ -3787,8 +3789,13 @@ static void handle_qmp_command(JSONMessageParser 
*parser, GQueue *tokens)
         QDECREF(req_json);
     }

+    old_mon = cur_mon;
+    cur_mon = mon;
+
     rsp = qmp_dispatch(cur_mon->qmp.commands, req);

+    cur_mon = old_mon;
+
     if (mon->qmp.commands == &qmp_cap_negotiation_commands) {
         qdict = qdict_get_qdict(qobject_to(QDict, rsp), "error");
         if (qdict
@@ -3825,13 +3832,9 @@ err_out:

 static void monitor_qmp_read(void *opaque, const uint8_t *buf, int size)
 {
-    Monitor *old_mon = cur_mon;
+    Monitor *mon = opaque;

-    cur_mon = opaque;
-
-    json_message_parser_feed(&cur_mon->qmp.parser, (const char *) buf, size);
-
-    cur_mon = old_mon;
+    json_message_parser_feed(&mon->qmp.parser, (const char *) buf, size);
 }

 static void monitor_read(void *opaque, const uint8_t *buf, int size)
-- 
2.14.3


Reply via email to