qapi event: convert SHUTDOWN

This patch also eliminates build time warning caused by
QAPI_EVENT_MAX = 0.
Signed-off-by: NWenchao Xia <wenchaoqemu@gmail.com>
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
Reviewed-by: NEric Blake <eblake@redhat.com>
Signed-off-by: NLuiz Capitulino <lcapitulino@redhat.com>

docs/qmp/qmp-events.txt

@@ -314,21 +314,6 @@ Example:
     "data": { "offset": 78 },
     "timestamp": { "seconds": 1267020223, "microseconds": 435656 } }
 
-SHUTDOWN
---------
-
-Emitted when the Virtual Machine is powered down.
-
-Data: None.
-
-Example:
-
-{ "event": "SHUTDOWN",
-    "timestamp": { "seconds": 1267040730, "microseconds": 682951 } }
-
-Note: If the command-line option "-no-shutdown" has been specified, a STOP
-event will eventually follow the SHUTDOWN event.
-
 SPICE_CONNECTED, SPICE_DISCONNECTED
 -----------------------------------
 

qapi-event.json

+##
+# @SHUTDOWN
+#
+# Emitted when the virtual machine has shutdown, possibly indicating that QEMU
+# is about about to exit.
+#
+# Note: If the command-line option "-no-shutdown" has been specified, qemu will
+# not exit, and a STOP event will eventually follow the SHUTDOWN event
+#
+# Since: 0.12.0
+##
+{ 'event': 'SHUTDOWN' }

vl.c

@@ -117,6 +117,8 @@ int main(int argc, char **argv)
 #include "ui/qemu-spice.h"
 #include "qapi/string-input-visitor.h"
 #include "qapi/opts-visitor.h"
+#include "qom/object_interfaces.h"
+#include "qapi-event.h"
 
 #define DEFAULT_RAM_SIZE 128
 
@@ -1962,7 +1964,7 @@ static bool main_loop_should_exit(void)
     }
     if (qemu_shutdown_requested()) {
         qemu_kill_report();
-        monitor_protocol_event(QEVENT_SHUTDOWN, NULL);
+        qapi_event_send_shutdown(&error_abort);
         if (no_shutdown) {
             vm_stop(RUN_STATE_SHUTDOWN);
         } else {