qapi/qmp-event.c

   1 /*
   2  * QMP Event related
   3  *
   4  * Copyright (c) 2014 Wenchao Xia
   5  *
   6  * Authors:
   7  *  Wenchao Xia   <wenchaoqemu@gmail.com>
   8  *
   9  * This work is licensed under the terms of the GNU LGPL, version 2.1 or later.
  10  * See the COPYING.LIB file in the top-level directory.
  11  *
  12  */
  13
  14 #include "qemu/osdep.h"
  15
  16 #include "qemu-common.h"
  17 #include "qapi/qmp-event.h"
  18 #include "qapi/qmp/qstring.h"
  19 #include "qapi/qmp/qjson.h"
  20
  21 static QMPEventFuncEmit qmp_emit;
  22
  23 void qmp_event_set_func_emit(QMPEventFuncEmit emit)
  24 {
  25     qmp_emit = emit;
  26 }
  27
  28 QMPEventFuncEmit qmp_event_get_func_emit(void)
  29 {
  30     return qmp_emit;
  31 }
  32
  33 static void timestamp_put(QDict *qdict)
  34 {
  35     int err;
  36     QObject *obj;
  37     qemu_timeval tv;
  38
  39     err = qemu_gettimeofday(&tv);
  40     /* Put -1 to indicate failure of getting host time */
  41     obj = qobject_from_jsonf("{ 'seconds': %lld, 'microseconds': %lld }",
  42                              err < 0 ? -1LL : (long long)tv.tv_sec,
  43                              err < 0 ? -1LL : (long long)tv.tv_usec);
  44     qdict_put_obj(qdict, "timestamp", obj);
  45 }
  46
  47 /*
  48  * Build a QDict, then fill event name and time stamp, caller should free the
  49  * QDict after usage.
  50  */
  51 QDict *qmp_event_build_dict(const char *event_name)
  52 {
  53     QDict *dict = qdict_new();
  54     qdict_put(dict, "event", qstring_from_str(event_name));
  55     timestamp_put(dict);
  56     return dict;
  57 }