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     int64_t sec, usec;
  39
  40     err = qemu_gettimeofday(&tv);
  41     if (err < 0) {
  42         /* Put -1 to indicate failure of getting host time */
  43         sec = -1;
  44         usec = -1;
  45     } else {
  46         sec = tv.tv_sec;
  47         usec = tv.tv_usec;
  48     }
  49
  50     obj = qobject_from_jsonf("{ 'seconds': %" PRId64 ", "
  51                              "'microseconds': %" PRId64 " }",
  52                              sec, usec);
  53     qdict_put_obj(qdict, "timestamp", obj);
  54 }
  55
  56 /*
  57  * Build a QDict, then fill event name and time stamp, caller should free the
  58  * QDict after usage.
  59  */
  60 QDict *qmp_event_build_dict(const char *event_name)
  61 {
  62     QDict *dict = qdict_new();
  63     qdict_put(dict, "event", qstring_from_str(event_name));
  64     timestamp_put(dict);
  65     return dict;
  66 }