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/qdict.h"
  20 #include "qapi/qmp/qjson.h"
  21
  22 static QMPEventFuncEmit qmp_emit;
  23
  24 void qmp_event_set_func_emit(QMPEventFuncEmit emit)
  25 {
  26     qmp_emit = emit;
  27 }
  28
  29 QMPEventFuncEmit qmp_event_get_func_emit(void)
  30 {
  31     return qmp_emit;
  32 }
  33
  34 static void timestamp_put(QDict *qdict)
  35 {
  36     int err;
  37     QDict *ts;
  38     qemu_timeval tv;
  39
  40     err = qemu_gettimeofday(&tv);
  41     /* Put -1 to indicate failure of getting host time */
  42     ts = qdict_from_jsonf_nofail("{ 'seconds': %lld, 'microseconds': %lld }",
  43                                  err < 0 ? -1LL : (long long)tv.tv_sec,
  44                                  err < 0 ? -1LL : (long long)tv.tv_usec);
  45     qdict_put(qdict, "timestamp", ts);
  46 }
  47
  48 /*
  49  * Build a QDict, then fill event name and time stamp, caller should free the
  50  * QDict after usage.
  51  */
  52 QDict *qmp_event_build_dict(const char *event_name)
  53 {
  54     QDict *dict = qdict_new();
  55     qdict_put_str(dict, "event", event_name);
  56     timestamp_put(dict);
  57     return dict;
  58 }