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 <inttypes.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 #ifdef _WIN32
  22 #include "sysemu/os-win32.h"
  23 #endif
  24
  25 #ifdef CONFIG_POSIX
  26 #include "sysemu/os-posix.h"
  27 #endif
  28
  29 static QMPEventFuncEmit qmp_emit;
  30
  31 void qmp_event_set_func_emit(QMPEventFuncEmit emit)
  32 {
  33     qmp_emit = emit;
  34 }
  35
  36 QMPEventFuncEmit qmp_event_get_func_emit(void)
  37 {
  38     return qmp_emit;
  39 }
  40
  41 static void timestamp_put(QDict *qdict)
  42 {
  43     int err;
  44     QObject *obj;
  45     qemu_timeval tv;
  46     int64_t sec, usec;
  47
  48     err = qemu_gettimeofday(&tv);
  49     if (err < 0) {
  50         /* Put -1 to indicate failure of getting host time */
  51         sec = -1;
  52         usec = -1;
  53     } else {
  54         sec = tv.tv_sec;
  55         usec = tv.tv_usec;
  56     }
  57
  58     obj = qobject_from_jsonf("{ 'seconds': %" PRId64 ", "
  59                              "'microseconds': %" PRId64 " }",
  60                              sec, usec);
  61     qdict_put_obj(qdict, "timestamp", obj);
  62 }
  63
  64 /*
  65  * Build a QDict, then fill event name and time stamp, caller should free the
  66  * QDict after usage.
  67  */
  68 QDict *qmp_event_build_dict(const char *event_name)
  69 {
  70     QDict *dict = qdict_new();
  71     qdict_put(dict, "event", qstring_from_str(event_name));
  72     timestamp_put(dict);
  73     return dict;
  74 }